Download B1_15_1985_Dec_WATTSUN Reference Manual_State of

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Public Wor1<s
Travaux publics
Canada
Canada
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Solar Programs Oflice (613) 998·9817
No. 11: February 1983
Computer Program Support Provided by the Solar Programs Office
In order to facilitate the use of computer aids in solar system design, the Sola r
Programs Office (SPa) of Public Works Canada provides support services for a number of
co mput er programs that are suitable for the design and evaluation of solar systems in
the Canadian climate.
These services are available to all Canadian solar system
designers .
The following solar design aids are mad e available and supported by spa on the
Datacrown and Control Data service bureaus :
FCHART 4 . 1
VENTAIR 2 . 0
ENERPUB
ASTEPl
The spa funds the provision , maintenance and storage of these programs on the service
bu reaus .
Consultants pay their own computing costs.
To gain access to the programs,
contact Kevin Ford at sPa for information BEFORE contacting the service bureau to set
up or modify an account .
Bri e f descriptions of these programs are attached .
Solar Energy Series
Canada
"
- 2 -
Support provided by the SPO is defined as follows:
1)
Program manuals are available on request from SPO (form attached).
2)
Guidance is provided on the USe and application of the programs and on the
thermodynamic principles of the programs in relation to solar system design.
3)
Guidance is provided on hard"are configurations and access to the programs.
4)
The programs are maintained by the SPO as the most up-to-date versions avaIlable,
as recommended by the program authors or by SPO staff.
The SPO also uses the WATSUN Program and encourages others to do so.
The National
Research Council has funded the establishment of a HATSUN User's Service at the
University of Haterloo, where the program originated.
It is the responsibility of the
User's Service to provide access to, and support for, the program.
intend to duplicate the efforts of the WATSUN User's Service.
on access to HATSUN contact:
L.R. Groves, (519) 885-6160.
use and application of WATSUN is attached.
For advice and assistance, contact:
Kevin Ford, DeSign Aids Engineer
Solar Programs Office
Public Harks Canada
Sir Charles Tupper Building
Riverside Drive
OTTAI,A, Ontario
K1A OMZ
Telephone:
(613) 998-3641
The SPO does not
For further information
An information sheet on the
_. 3 ..
of Computer Progra",s Supported by SPO
FCHART can be used for the analysis and design of solar heatIng systems and heat
pump
systems~
Based on methods developed at the UnJversity of WlsconsJn f s Solar
Energy Laborato:ey, the program featu:res
11fE:~w"eycle
optimization~
e08t analysis 9 system
eapabt 11 t1.es
~
The program
UBes
long~;term
a
Heatlt(~r
data.
find Heather data handli.ng
rnonth=·by-~>month
Carladlan locat.ions are built into thor:! p:cogf:al1L,
thermal p(::y'formance and
analysis
Heather data for 97
0
The user may :l.nput additIonal
The program Is int('::ract.iv(: and provJdes ta.bles of pet"£ormanc.e
-resultso
See Tec.hrdcal Note If12 fol' a detailed summary of program enhancements fo:t FCHAR'1'
versions 3.0, 4.0 and 4.1.
2)
El1IERPUlI
The ENERPUB computer program simulates the perfonnanc.e of
short·~t:crm
liquid·-~ba8ed
storage solar space heating syst.ems \'lith o"r without: a heat
seasonal or
pump~
The
IH'ogrmll can also sImulate the performance of a solnr heaLlng system used to heal:
0-1.1 In r.torage tanlu;.
hot
1ildL(~r
ENERPUH is not suitahle fot' rdmulation of solar dome(:;tie
8Y8ten.18 because of the rCGtr>l.ctive hea!: ex,changer: models .
peefot'mance is simulated for each
hout<~
ENERPUn haG
the potent:i.al for gr.eater
aceu:eacy than programs using monthly calculation procedures
~
Hmu:ly \I}cather data
is avai],able for 46 Canadian cities.
Severa1 of the models tn the ENERPUB
progral'l1 IrlGTC'!
adapted from HATSUN models vllth
Bome enhanc.c:':mentn over the WATSUN space heatIng progn-1uJs:
Stl'c1tifiert tank model for short-term or seasoQal storageo
FOllr possible heat pump locations&
Inclusion of heat loss from the storage to the
building~
outdoors or ground$
Inclusion of heat loss from collector and storage pip:lng to
building~
outdoors
or ground.
Th" attaehed diagrams show typieal applJcations for "h1cl1 ENERPUll is sui table.
- 4 -
HX
c
ST
2
Node 3
Node N
PI
CD
Figure 1:
Figure 2,
ENERPUB Application:
Solar Heating System Schematic - No Heat
- system type 0
Eml:R1'lHl Application:
Solar Heating System Schematic - Heat Pump in Series with Solar Supply - system type 1
HX
HX
_'II...
c
ST
---!\)-Pl
Figure 3:
CD
ENERl'UB Application:
Solar Heating System Schematic - Heat Pump in Parallel with Solar Supply - system type 2
- 5 -
CD
,,--r
DlIW
r4
!"IIl".:re 4,
ENIlRl'lllll ApplIcaU.<lln:
Sol,n Heatin!! SY'ltem Schemat!"
~
HX
:5,
1I""t Pump Supply Only - sY1:!t"m typ" J
OIl,
c
ENERPUlil AppllcatIm"
OIl Tank He"ting SygtelU -
sY1:!i:<>rtl type t.
- 6 -
3)
VENTAIR 2.0
The VENTAIR 2.0 computer program simulates the performance of air-based solar
collectors used in industrial process or building ventilation preheat systems.
The program can be used to simulate zero-storage systems with 100% ambient fresh
air intake to the solar collectors.
The program accepts data from all PUSH
approved air-based collectors or from any parallel plate air-based collector or
fibre matrix collector.
Performance calculations are based on hourly simulations.
Use of the program is restricted to applications for which the air demand is
constant over the hour.
For instance, a bathroom ventilation system operated by a
light switch or short duration timer is not an appropriate application. Hourly
weather data is available for 46 Canadian citles.
The attached diagram shows a typical application for which VENTAIR 2.0 is
suitable.
~anels
Collector
Solar
Heated
I
I
II
Fresh
Air
Collectoo:
Blm'ler
I
II
I
__ ~~l.f?~r-I---: ___
Face and
Bypass Damper
.1'-
Building
Supply Air
I
-- !
Direct
Fresh
Fan
QSensor
I (Tl)
;..
Air
HD3
U,
,
~1])2
L ________ .,
I
Heatinf!:
Coil
,
r------------J
:
~--------------------------J
!wo-stage Control Unit
SEQUENCE OF OPERATlnN
Stage
I"L__
.
II
Tamb
('~1\
l·UJ ...... J
I
I
1~
Damper 1
IIi
Ii
C!",
-
I
Tb<>·
.~
3
I'l'l
?
I
I
(>-1])2 )
I
I
Collec tor Elm,rer
Damper 3
Peating Coil
TI
(1'1D3)
'
'
Ij
•
.1
Damper 2
'b"
-bg!
0
DFT.'
Bypass
OFF
~
0
n
(C
BYT'ass
OFF
Tbg
I
0
C
()l\J
l1ypass
ON
Tbg
,
C
and
Coil
.1
Tho- is the desire.d inJ et tern.perature to the building or process
o
Figure 6:
VENTAIR Application:
System Schematic
.Log
I
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J
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4)
ASTEPl
ASTEPI simulates the hourly performance of both liquid and air solar heating
systems for space and service «ater heating.
The program is primarily directed to
the analysis of seasonal storage systems, although options are included to permit
the simulation of short-term storage systems 1 a eombined seasonal storage system
and a short·-term storage system.
ASTEPI utilizes the newly expanded solar radiation database of the Canadian
Atmospheric Environmental Services (AES), including pre-calculated radiation data
for selected tilt angles.
The program also allows the nser to examine the effort
of year-to-year «eather changes on the performance of a specified design.
A
simplified but accurate method for calculation of heat losses for a burIed
seasonal thermal storage tank is included.
10 Canadian cities.
Hourly weather data is available for
- 9 -
IiIATSIlN
WATSUN is an interactive program for the thermodynamic and economic evaluation of solar
system designs.
It is based on hour-by-hour simulation and uses meteorological data
for 52 Canadian locations.
Fifteen modules are now available, from simple DHW systems
to solar-assisted heat pump systems.
The output Includes the monthly and yearly energy
consumption and a life-cycle economic analysis "hich compares the cost effectiveness of
the solar heatIng system with a conventional reference heating system.
IVATSUN also
provIdes sever'al unique features such as specification of 'veekday/weekend and seasonal
load profiles, various heat exchanger models, and detailed hourly printouts.
The £0110l,,1ng 14 system models are available,
1-
Dml
Domestic Hot vlater System with Preheat Storage
2.
DHIVO
Domestic Hot .vater System without Storage
3.
DHHA
Domestic Hot Water System with Storage and Exchangers
4.
L
Liquid Based Solar Heating System
5.
A
Air Based Solar Heating System
6.
LHPP
Liquid Based SAHP System with HP in Parallel
7.
AUPP
Air Based SAHP System wIth HP in Parallel
8.
LHPS
Liquid Based SAHP System with HP in SerIes
9.
AlIPS
Air Based SAHP System ''lith HP in Series
10.
LHPD
Liquid Based SAHP with Dual Source HP
11.
AUPD
air Based SAHP System with Dual Source HP
12 "
LHPT
Liquid Based SAHP System with
13.
HP
Ai...·-to-Ai I' Heat Pump
14.
ER
Electric Resistance Heating System
T'idO
Storages
However the Solar Programs Office has validated and approved only the first 5 models.
- 10 -
vlATSUN MODELS
1.
Diffi
This model simulates a liquid-based solar DnW system with preheat tank such as
that shown in Figure 7(a).
auxiliary heater.
The major components are collectors, storage tanks and
Collected energy is stored in the preheat storage tank until
required. When the heating demand cannot be met completely by the solar source,
the auxiliary heater supplies the balance of the demand.
2•
DIffiO
This model simulates a liquid-based zero-storage solar system \vith no preheat tank
as shown in Figure 7(b).
3.
The major components include collectors and auxiliary
heater.
Collected energy is passed directly to the auxiliary tank for use as
needed.
The auxiliary heater supplies the balance of the demand.
nnWA
This model simulates a liquid-based solar DnW system with preheat tank and
heat exchangers as shown in Figure 7(c).
The major components are collectors,
storage tanks, heat exchanger(s) and auxiliary heater.
in the preheat tank until required.
Collected energy is stored
When the demand cannot be met completely by
the solar source, the auxiliary heater supplies the balance of the demand.
Three
types of exchanger are permitted - 1) external, 2) ,vraparound and 3) coil.
4.
L
This model. simulates a liquid-based solar heating system with a single tank
serving both space and DHW loads as shown in Figure 7(d).
The major components
include collectors, storage tank, heat exchanger(s) and auxiliary heater.
The DnW and space heating loads are served independently from a common storage
tank.
Collected energy is stored in the tank for use as needed.
heaters supply the balance of the demand.
building is assumed.
Auxiliary
Foreed aIr dIstribution in the
Auxiliary
Heater
Auxiliary
Heater
I' . 0
rr-r----~I~
I
.I IIH.~t
:+1
Hot Water
Wat
,
.
I
I
•
I
I
t
.
Pre-Heat
Storage Tank
Auxiliary Tank
yump
Auxiliary Tank
Water Hains
Pump
Figure la: W.!iTSIllII Application. Type ])W:
DIDi' System with Preheat Tank
Water Mains
Figure lb: WATSIllII Application. Type ])IDi'o:
DW Zero-storage System
Auxiliary
Heater
~
l
Collector
Hot Water
I
I/;
Storage
Exchanger
r--
~
Preheat
Storage Tank
<;> ~
,
I
I
I
I
.
.
I
I I
I
I
?:>
I
I I
I
St~rag
I
!
i
I
Load
!,'T,e"
I
Auxiliary Tank
~
>-'
Pump
Figure 1 c: UATSIllII Application. Type ])WA:
DfF~ System with Preheat Tank and Rea t Exei1angers
I
h.later Mains
To Conventional DIH.J Heater
f-'
N
Load Pump
....
-,
,,
?:,
L
,
Building
_ J
Liquid
Storage
,-+--+-+-,' Tank
Collector Pump
Water Mains
Auxiliary Heater
Figure 7d: WATSUN Appl.i<:ation. Type L:
Liquid-based DBW and Space Heating System with Singl.e Tank
Building
Heating Fan
Solar Air Collector
Local \,ater
Supply
Rock-Bed Storage
(Divided into tN'
Segments for Analysis)
-]-
-
-
,-
_J. __
Building
::CH
ro
Auxiliary Heater
0
'n-C:>
ro"
0
H
"
"ron-
"o
""
t-'-
f-"
t:!
::c
Building Return
Air By Pass
:s
Collector Circulating Fan
Figure 7e: WATSUN Appl.ication. Type A:
Air-based DBW and Space Heating System with Roek Bed Storage
- 13 -
5.
A
This model simulates an air-based solar heating system for space and hot water
heating of a residential building as shown in Figure 7 (e).
The major components
are the collectors, rock bed storage and auxiliary heater.
The heated air from
the collectors is passed either through the storage or the building.
If no
collection is possible and there is a demand, energy is drawn from storage and
supplemented by the auxiliary heater.
temperature and maintain air flow.
A by-pass duct is used to moderate the
The storage can be stratified up to a maximum
of 5 segments.
WATSON User's Service
The IvATSUN User's Service at the Univeristy of lvaterloo provides the following support
to users:
1)
A user can set up an account to run WATSUN on the University of Waterloo
computers, via a phone link.
2)
Copies of the WATSUN program and manual can be purchased from the User's service.
3)
Gui.dance is provided "lith respect to the thermodynamic models used for HATSUN.
Users may set up acounts to gain access to the program by contacting:
LoR. Groves
WATSUN User Service Facility
415 Phillip Street
HATERLOO, Ontario
N2L 3X2
Telephone:
(519) 885-6l60
ORDER FORM, COMPUTER PROGRAM MANUALS
I intend to use the following computer programs for the design and analysis of solar
heating systems.
Please send a manual for each of the programs checked and register me
as a user of those programs.
Name:
Tit Ie:
Organization: _________________________________________
Address: _____
City:
Province:
Postal Code:
Telephone Number:
~(_-L) ___________________
Computer Service Bureau Used:
Account
Number~
Return to:
[]
FCHART 4.1 (145 pages)
u
ENERPUB (68 pages)
[J
VENTAIR 2.0 (50 pages)
[J
ASTEP1 (41 pages)
Kevin Ford
Design Aids Engineer
Solar Programs Office
Public Works Canada
Sir Charles Tupper Building
Riverside Drive
OTTAWA, Ontario
KiA OM2
,., ,
.
,
", "
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Wsfo
WASHINGlDN
STATE ENERGY
OFFICE
4;4~
(
,
,.
WAOENG-85-44
Derember 1985
_ __
400 East Union
Olympia, WA 98504
(206) 754-Q7OO
WATISUN
Reference
Manual
Version 3,1
1; .
.. . ,:.,,;.
. '.:':.
', ..
..
-.
,
(.
Sponsored by
BONNEVILLE POWER ADMINISTRA nON
Under Agreement
No. DE-FC79-82BD34623
ii
Disclaimer
Neither the United States, the Bonneville Power Administration,
the State of Washington, the Washington State Energy Office,
nor any of their employees, nor any of their contractors, subcontractors, or their employees, makes any warranty, expressed or
implied, or assumes any legal responsibiUty for the accuracy,
completeness, or usefulness of any information, apparatus, product application, or process disclosed within this manual.
(
Additional copies of WATISUN Version 3.1
can be purchased from the
Washington State Energy Office.
.; ,': .' ,_, ._t.
.- - '" ,.'- '" --......
..."
'-.
For information, contact
John Doyle, 754-0745
.
.:-
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!;
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iti
TABLE OF CONTENTS
(
L
Introduction .........................................................,................... I-I
n.
Overview of WAITSUN 3.1: limitations and Parameters
Flow Chart of WATfSUN Menus ..........................................
Thennal ........................... ........ ............. ...................................
Economics .................................................................•.............
II-1
11-1
II- 2
11-4
m
Getting Your Inputs Together ............................................. III-l
An Overview .......................................................................... 111-1
Things to Consider When Entering Areas and R-Yalues ..... 111-1
How to Get the Infonnation You Need From a Blueprint ... 111-2
Input Worksheets: An Example ............................................. III-3
IV.
WATTSUN 3.1 .......................................................................
What You Will Need to Start ................................................
Dual Floppy Disk Systems .... ..... ........ ......... ......... .......... ........
Running the WATfSUN Program ..........................................
Hard Disk Systems ..... ... ......... ............. ....... ............... ...... .......
The WATfSUN Screen Design ..............................................
Symbols Used in Our Example ..........................•..................
Entering Data .........................................................................
Help vs. No Help Runs .. ... ........ ............ ... ................... ..........
IV-I
IV-I
IV- 1
IV-4
IV-4
11/-7
IV-B
:rv-9
IV-9
WATfSUN Example Run ..................................................... IV-12
Creating a New HIe ............................................................... IV-12
~~tinJe;r=..::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: ~=~g
Y.
"'~-
VI.
Economics ...............................................................................
Printing WATfSUN ................................................................
Storing Our Example ..............................................................
Creating Back-Up Data Disks ................................................
Summary of File Commands .................................................
Editing Existing Files ..............................................................
IV-42
IV-46
IV- 4 7
IV-49
IV-50
IV-50
Cost Data ...............................................................................
Overview of Cost Accounting ................................................
Cost Data Tables ....................................................................
V-I
V-I
V- 2
Procedures for Calculating Energy Budget with a Heat
Pump ...................................................................................... VI-I
VII.
Bibliography ..... : .................................................................... VII-l
VIll. Summary of Commands ................................................... VIII-l
IX.
Building Component Worksheet
Input Worksheet
IX
Iv
LIST OF TABLES
Tabl... A and II (Input Wozksheet) ............................................ III-5
Table 1
I!>cremental Costs Per Square Foot of Basement Wall
Types of lnaements ................................................. v- 3
Incremental Costs Per Square Foot of Floor By Types
of Incremellts .................................................................. V-4
Incremental Costs Per Square Foot of Wall By Types
of Increments ................ ......... ................ ......................... V- 5
Incremental Costs Per Square Foot of Window By
Types of Increments .............. ........ ................ ................. v-6
Incremental Costs Per Square Foot of Door Barrier By
Types of Increments ................................ ,...................... V-7
Incremental Costs Per Square Foot of Ceiling By
Types of Increments ....................................................... &-8
Incremental Costs Per Square Foot of Air Infiltration
Banier By Types of Increments ..................................... V-9
Incremental-Costs Per Square Foot of Air"to-rur Heat
Exchangers By Types of Increments ............................. &-10
(
By
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
Table 8
(
(
Section!
(
1
Introduction
loday's increased interest in energy efficient home construction has
stimulated the demand for energy analysis tools which are quick and
easy for the builder, designer, and code official to use, and which
accurately reflect the importance of people, appliance, and solar
gains in very well insulated buildings. WATTSUN is intended to be
such a tool.
WATTSUN was developed by the Washington State Energy Office,
Ecotope, and the Bonneville Power Administration. It was based on
"The Model Conservation Standard Energy Budget Approach Handbook,1I prepared by Larry Palmiter and Richard Byers of Ecotope,
Inc., with funding from the Bonneville Power Admihistration. The
Handbook contains the coorelations for thousands of annual heating
load simulations generated by the SUNDAY simulation program •.
SUNDAY was developed by Ecotope, Inc., and is used in evaluating
Model Conservation Standards of the Northwest Power Planning
Council. For mOt'e precise results, locations not listed, or buildings
that are beyond the parameters of this program, users may wish to
contact Ecotope, me., 2812 East Madison, Seattle, WA 98112, phone
(206) 322-3753.
WATTSUN was designed to assist the user ·in
estimating the thermal component performance (UA/ft2') and the
space heat energy budget (kWh/ft 2 /yr) of a single-family residence.l
WATTSUN can be used to comply with the thermal requirements of
the Super Good Cents Program and relevant energy codes. In
addition, WATTSUN 3.1 can prOVide a comparative economic analysis of two homes with different thermal characteristics and
construction costs. This can be very useful when evaluating the cost
effectiveness of proposed Super Good Cents homes with homes built
to current energy codes or current practice.
It is very important that the user understand that the values are
,
..........,,,
relative and not absolute. Actual heating and construction costs
. can, and most likely will, be different. The usefulness of this tool
. for evaluating building and heating costs is for bottom line comparisons - not actual costs or thermal performance.
Before attempting to ron IVATTSUN, see Chapter IV.
Super Good Cents Reference Malllla/. Oregon State University and
Bonneville Power Administration. January 1985.
"',,J
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1x
. ';-"
,
•
-~
-,
~.
~')
; .. :
Overview of WATISUN 3.1
Limitations and Parameters
Flow Chart of WATTSUN Menus
This flow chart provides an overview of the WATTSUN program. It shows
the relationships of the various menus to one another. For instance, if the
user is in the Main Menu and wishes to change the mortgage interest rate
of the example run in Section IV, he or she would select (6) Economic
Menu, and then select (4) to revise the mortgage rate. To select another
menu, press (ESC) and the program will return to the Main Menu at which
point the user can select another menu.
MAIN MENU
i
HEATING
10
(I)
Houae Name
2 Address
3 Builder
4 O.....ner
5 Utility
6 Analyst
COMPONENT"
AREA
(2)
(3)
1 Basemenl
FI2 of
23
1 Soulh
2 Slab on Grade
3 Cra .....1 Space
4 Above Grade
Healed
Floor Area
Required
Locations
To Select
From
2
3
4
5
6
Walls
5
6
7
8
9
t 1
Windo ..... s
Doors
Skylight
Ceilinga
lnlll1ralion
P,iHmal Mass
ECONOMIC
(6)
SOLAR"
(5)
LOCATION
(4)
Southeast
East
Northeaat
North
North.....est
1 West
8 Southwest
• Input for a current and a proposed home if economic analysis is required.
1
2
3
4
5
6
1
8
9
10
Base
Other
Mal1l;·Up
Rata
Term
% Down
Tax Bracket
Real Estate Tax
Inaurance
$/kWh
SYSTEM"
PRINT
FILES
(7)
(e)
(0)
Complete
Summary
Bldg. Comp.
Economics
5 Heeting
2 Save
3New
• Drive
5 Default
t Type
2 Summary
3 Duct Loaa
4 T'STAT
5 Weather
Deaign
Temperature
1
2
3
4
1 Load
i
~
....
2
SectlonH
Thermal
The thermal analysis portion of WATTSUN consists of two main
parts: 1) a menu driven building component description routine;
and 2) an energy calru1ation routine.
(
The Component Menu of WATTSUN prompts the user for the
types and areas of thermal components in a home. WATTSUN
adds up the heat loss from all the specified building thermal
components and calculates the heat loss coefficient (UA) in Btu/
hr/"F. It then divides the UA by the ft2 of heated floor area in
order to provide the component thermal performance (UA/ft2)
as an option for Super Good Cents thermal compliance.
Another option is the energy budget. This thermal analysis routine of WATTSUN was derived from thousands of computer simulations and curve fit correlations that were developed by
Ecotope for the Bonneville Power Administration. To calculate
the energy budget, the user must specify the house location,
heated floor area, glazing area, and thermal mass in addition to
the Component Menu information. The energy budget (kWh/fl2/
yr) is defined as the number of kWh used to space heat a ft2 of
heated floor area in one year.
.,"
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SectionH
(
3
Location
Compliance with the Northwest Power Planning Council's
Model Conservation Standards can be evaluated using:
Portland: (Zone 1, <6,000 HOD)
Spokane: (Zone 2, 6,000 ~ HD ::s 8,000)
Missoula: (Zone 3, >8,000 HOD)
The following cities' weather data can be run with WATTSUN.
Otherwise use the location most typical of your area:
Astoria, OR
Billings, MT
Boise, ID
Cutbank, MT
Dillon, MT
Glasgow, MT
Great Falls, MT
Helena, MT
Lewiston, ID
Lewiston, MT
Medford, OR
Miles City, MT
Missoula, MT
North Bend, OR
Olympia, WA
Pocatello, ID
Portland, OR
Redmond, OR
Salem, OR
Seattle, WA
Spokane, WA
Whidbey Island, W A
Yakima, WA
House Size
WATTSUN will provide the most accurate results for heated floor
areas of 850-3,350 ft 2 (in most cases this includes basements but
not unheated garages).' The program will accept values from 500
ft2 to 3,350 ft2.
·
',:
Glazing Area
The maximum glazing as a percentage of heated floor area
percent.-
- WATfSUN will advise you when you are out of this range.
j.
20
4
SectlonH
Thermal Mass
This Component Menu input is used for the "energy budget"
calculation. WATTSUN will provide the most accurate results
when the thermal mass level is greater than or equal to 3 Btu/
F/ft2 and less than or equal to 10 Btu/F/ft2 of heated floor area.
The program always assumes a minimum thermal mass of 3
Btu/"F/ft2."
(
Insulation Levels (UA/it2)
Heat loss per square foot of floor area ranging from .1 to .8 Btu/
ft2 can be accurately evaluated. This range of insulation levels is
found in new housing stock."
Other
. .. :.
.
"
..
".: .~-.
'
..'-
Thermostat settings are fixed at 65°F for Super Good Cents compliance only; internal gains (heat from people and appliances) are
assumed to be 3,000 Btu/hr. Heating system efficiency is assumed to be 100 percent (including ductwork). Thermostat settings, heating system efficiency, and heating duct heat loss can
be changed by the user only when evaluating space heating
use for the heating system economics portion of the program.
Economics
Economic analysis can be an excellent marketing tool! It also allows the user to design the most efficient home for the least relative cost while still complying with the thermal requirements of
Super Good Cents or relevant energy codes.
(
• WATfSUN will advise you when you are out of this range.
Sectionll
(
5
An economic comparison of two homes, current and proposed,
can be accomplished if the home's heating system types, efficiencies, component insulation levels, areas, and cost differences" are
entered in the Component Menu. WATTSVN does three economic analyses:
I. The life cycle cost (LCC) of the current and proposed homes
is calculated. LCC is the total cost to purchase, maintain, and
heat a home, including property taxes, insurance, and income
tax interest deductions expressed in today's dollars and calculated over the home's expected life.
\,
~3:::' :~',
t··
""
·"C .. ' .. '·
\:
, ".
.' .'
~".
'.~.
2. The first year's average monthly payments for the current and
proposed home are calculated. This provides the user with information on the increase or decrease in first year cash flow.
This information can be especially helpful to the lending institution which may evaluate the homeowner's ability to make
house payments before proceeding with a loan.
3. You are allowed to analyze the various insulation strategies
that you might wish to use on a particular house, comparing
each option in terms of heat saved per dollar spent. With a
fixed dollar budget for conservation features, you can spend
the money first on those items t!;lat provide the greatest reduction in heat loss per dollar spent. Dividing the reduction in
heat loss from current to proposed into the cost of upgrading
the component yields the cost optimization ratio expressed as
Cost/VA. The smaller this value, the better the option.
Note: It should be stressed that these are comparative costs and
not actual costs.
·Cost differences, known as "incremental costs", are the additional costs
associated with any comparison of alternatives, such as increased in~uJa~
tion or heating system efficiency. For a more complete explanation and
reference table of "incremental costs", see Section V.
,.'
,,',
6
SectiooU
WATISUN allows changes in economic parameters. There are
certain assumed values, called "default" values, that WATTSUN
will automatically use unless manually changed b.y the user
while in the Economic Menu. Default values can be customized
and saved, as part of the default values associated with the default building file specified under the Files Menu in the WATTSUN program.
Parameters
1 Base (cost of home)
2 Other (miscellaneous costs)
3 Mark·up (on envelope and heating system)
4 Rate (interest on loan)
5 Term Oength of loan)
6 Downpayment (percentage)
7 Tax Bracket (federal and state)
8 Real Estate Tax
.'"
L'
>,' •
9
InSurance
10 $fkWh (cost of electricity)
Default
$75,000
$0
20%
12%
30 }'IS.
10%
30%
2% of total cost
1% of total cost
$,05/kWh
Assumed default values for real fuel cost escalation and consumer discount rates cannot be changed by the user. The values
used in WATTSUN are as follows:
1
Consumer discount rate
2
Real fuel cost escalation rate
1O%/year
3%/ye ar
(
('
Sectiooill
1
Getting Your
Inputs Together
(
An Overview
Before running WATTS UN, you must determine a/1 paths of heat
loss from the home, the area (ft2) of those paths, and the nominal insulation levels (insulation R-values only) in those paths.
The paths of heat loss through various building components to
consider are as foJlows:
1. Basements'
2. Slab on Grade'
3.
4.
5.
6.
7.
8.
9.
10.
Crawl Space
Above-Grade Wans
Windows
Doors
Skylights
Ceilings
lnftltration
Thermal Mass
• Record the linear footage (LF) of these components.
Things to Consider When
Entering Areas and R-Values
I. Acquire your dimensions from the house plans and window /
door schedules.
2. Always record outside dimensions.
3. Record the rough frame area of windows and doors available
on window/door schedules.
4. Record all above-grade portions of below-grade walls as
above-grade wall.
2
Section m
5. Use the linear footage (LF) of all below-grade wall but not the
daylight basement waIl.
6. Record the area of glass In each direction (do not include
skylights).
c
7. Total heated floor area (ft2) should include all heated floor
area, such liS heated basements, heated greenhouses, heated
garages, ele.
8. Record (LF) of slab on grade and include the exposed portion
of daylight basement slab.
9. Record (LF) of ductwork and furnace duct size in unheated
space.
10. Record (ft2) of above-grade exterior masonry walls including
exterior fireplace walls and uninsulated above-grade basement
walls.
11. Acquire net wall area by subtracting windows and doors
from gross wall areas of that component.
12. Don't forget odd walls, band joist areas, and knee walls to attics/crawl spaces.
How to Get the Information
You Need From a Blueprint
",.,.,,-
...
1. Measure and record the linear footage (LF) of exterior foundation wall or slab for each type of above-grade wall in home
(include daylight basement walls).
2. Multiply the above values by the height of that type of
above-grade building wall to get the gross wall area abovegrade.
3. Determine and record the ft2 of doors.
4. Determine and record the ft 2 of windows for each house direction (i.e., north, south, east, west) for each type of window
(Le., double glazed, triple glazed, etc.).
5. Subtract and record the doors and windows for each type of
above-grade wall from the gross above-grade wall areas.
(.." .
·,--:"--'
',".-,
Sectioo.ill
>'
(
('
>.
.....
.
3
6. Measure and record the ft 2 of crawl space floor and roof area.
(Note: These will be the same for homes with flat ceilings
onlyJ
7. To calculate home volume, multiply the ceiling height by the
total floor area and record. (Note: Add any additional cathedral ceiling volume to that number only if the cathedral ceiling is substantially leakier than the flat ceiling. For example,
ceiling is car decking instead of sheetrock.)
8. Measure the ft2 of heated wood floor area and record. Measure the ft2 of slab floor area and record. Measure the number
of gallons of water storage or ft 2 of additional thermal mass
and record.
9. Measure and record the linear footage of below-grade basement wall (basement only).
to. Add windows in below-grade basement walls to window it2
in each direction.
Time-Saving Tips: Ask the builder to provide: a) window schedule with the manufacturer, model number, direction and ft' of
each window included; b) door schedule with the manufacturer
and model number; c) ft' of heated floor area.
Input Worksheets: An Example
-
-.
~
The following worksheet examples have been completed for the
example run in the next chapter. Blank worksheets for future use
are included in Section IX..
The Building Component Worksheet has all the building component data.
The Input Worksheet has all the life cycle cost data for the economic inputs, heating system specifications, and the duct heat
loss calculations.
Sectionlli
4
Building Component Worksheet
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Sectionm
5
Input Worksheet
(
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·!l· .,
-
..:.,.
SectionIV
1
WATfSUN 3.1
(
What You Will Need to Start
1.
2.
3.
4.
5.
6.
7.
An IBM Personal Computer (PC, XT, or AT), Compaq, or
other 100 percent compatible system.
256K of random access memory (RAM).
Two 5-1/4" floppy disk drives (double-sided, double-denSity), or one hard disk and one 5-1/4" floppy disk drive.
Any SO-column dot matrix or letter-quality printer.
A diskette containing version 2.0 or greater of DOS (normally purchased along with your computer system).
The WATTSUN Master Disk which accompanies this manual.
Two blank floppy diskettes (for dual floppy systems only).
Dual Floppy Disk Systems
Before using the WATTSUN program, it is important for you to
make a working copy of the original master disk, a working data
disk, and a back-up data disk. Never use the original WATTSUN
Master Disk for normal operation of the program. The steps required to make working copies are different for dual floppy and
hard disk systems. The following are the instructions for making
working disks for use on a dual floppy system .
.,
...
(
Step 1: Label Your Blank Disks
Label the two disks as follows:
Disk 1:
Disk 2:
Working Program Disk: Drive A
Working Data Disk: Drive B
2
SectionlV
Step 2: Start Your System
Place your DOS disk in drive A (left side) and switch on the
power to your computer. After about 30 seconds, your system
should boot (load) DOS. Depending upon your system, you may
be requested to enter today's date and the current military time;
do so if requested. The DOS prompt A> should appear at the
left side of your screen.
c
Step 3: Make a working copy of the WATTSUN
Master Disk
_
To make a working copy of the WATTSUN Master Disk, you
must first format the disk labeled Working Program Disk and
copy your DOS software onto it. This can be done by running
the FORMAT program from your DOS disk in drive A. Insert
the Working Program Disk into drive B. Enter the command below and press the return key (large key between the normal
typewriter keys and the numeric key pad which has an arrow
symbol pointing downwards and then to the left). Enter:
.....
C'·
..'
FORMAT 8:/S
The FORMAT program will begin with the following prompt:
- - ,.-, ......-
Insert new disk for drive b:
and strike any key when ready
Press any key on the keyboard and the disk will be formatted
and your DOS system will be copied onto it. While processing,
the follOwing messages and prompt will appear:
.'
FORMATTING._ FORMAT COMPLETE
System transferred
362496 bytes total disk space
40960 bytes used by system
321536. bytes available on disk
FORMAT ANOTHER (Y/N)?
(
.
'"
-.
,
....
... ,
SectioolV
(
3
Respond by typing N. The A> prompt will reappear at the left
side of the screen. Now all the program and data files on the
original WATISUN Master Disk must be copied to the Working
Program Disk. Remove the DOS disk from drive A and insert
the original WATISUN Master Disk in its place. The disk labeled
Working Program Disk should still be in drive B. Copy the contents of the WATISUN Master Disk in drive A to the Working
Program Disk in drive B by typing the command below and
pressing the return key. Enter:
COPY A:·.· B:/V
Files will be copied to the Working Program Disk in drive B.
When the A> prompt reappears, remove the WATISUN Master
Disk from drive A and store it in a safe place. Remove the
Working Program Disk from drive B. The Working Program Disk
can store an additional 50 building flies.
Step 4: Preparing the Working Data Disk
To format the Working Data Disk, put your DOS disk in drive A
and the disk labeled Working Data Disk in drive B. Enter the following command, then press the return key:
FORMAT B:
When formatting of this disk is complete, the system will prompt
with:
FORMAT ANOTHER (Y /N)?
,',-
.",.j,
(
Press N. Next, remove the DOS disk from drive A and replace it
with the Working Program Disk. The Working Data Disk should
still be in drive B. At the A> prompt, enter the command below
and then press the return key:
COPY A:DEFAULT.· B:/V
The default mes will be copied from drive A to drive B.
4
SectionlV
RUlUling the WATTSUN Program
When running WATTSUN on a duailloppy disk system, always
place the Working I'wgnIm Disk in drive A and the Working
Data Disk in drive B. The program can be started in one of three
ways:
1.
(
If your computer is off, turn It on and insert the Working
Program Disk in drive A and the Working Data Disk in
drive B. The Working Program Disk will automatically start
it running.
2. If your computer is on, insert the Working Program Disk in
drive A and Working Data Disk in drive B. When the
prompt A>appears, enter the following command and press
return:
,''''
,
:,J .
_:,.
3.
WATTSUN
If your computer is on, you can also start the program by resetting the system. Reset the system by inserting the Working Program Disk in drive A and the Working Data Disk in
drive B, and then press the following three keys at the same
time:
(CTRL) (ALT) (DEL)
Hard Disk Systems
'<' ;,
. -!.'
Step 1: Start Your System
Switch on the power to your computer. After about 30 seconds
your system should boot (load) DOS. Depending on your system, you may be requested to enter today's date and current military time; do so if requested. The DOS C> prompt should
appear at the left side of your screen .
Step 2: Making a WATTSUN Subdirectory
Subdirectories allow you to group related program files and data
files together on your hard disk. To make a subdirectory for all
the WATTSUN files, type the following command at the C>
(
.'
'. ~,-
..
SectionIV
(
5
prompt and press the retUrn key (large key between the normal
typewriter keys and the numeric key pad which has an arrow
symbol pointing downwards and then to the left):
MKDm\ WATTSUN
Move to your newly created WATTSUN subdirectory by typing
the following command and pressing the return key:
CD\WATTSUN
We are ready to copy the WATTSUN files from the original
WATfSUN Master Disk to your hard disk.
,.
(
:
Step 3: Copy WATTSUN to your hard disk
You should currently be in the WATTSUN subdirectory. Place
the original WATTSUN Master Disk in drive A. To copy all the
WATTSUN files to your hard disk, type the following command
and press the return key.
COPY A:·.· C:
All the files on the Master Disk in drive A will be copied onto
the hard disk. For the program to run smoothly from the hard
disk, you need to change the location of the default file from
drive A to drive C. To do this, enter:
WATTSUN (RET)
.:-.... - ...
The message line at the bottom of the screen will ask if you
would like help with the menus, enter:
N (RET)
Now press:
9
6
SectioolV
You are now in the file section of the program. To change the
default me location, press:
("
5
Now to change the drive, press:
1
Enter:
C (RET)
To exit WATTSUN, press the (ESC) key 3 times. When you hear
a tone, press:
E
Step 4: Running WATTSUN on your hard disk
To run WATTSUN you must first be in the WATTSUN subdirectory. If you are not, move there by typing the following command and press the return key:
CD\WATTSUN
.
~
.,.
Now to run WATTS UN, type the following command and press
the return key:
~.-'.
WATTSUN
The program should start running .
.,
,
~
: ... ' :-. ' : :,.; .....~.:
;.'
.. '.
(
· ',:;,
The WATTSUN Screen DeSign'.
'.,
"
- .~. ' :,"'. ,!.,. '--_'-_~,:.':;"'-o:i_
"::",.,:,,
.
'-",.0 .
WATTSUN. uses the screen to displaYli vari?!Y<.?H~~if,~atipili,de­
scrIptiveor helpful messages; prompts whlchrequestyou'to'supply information or answer questions via the keybOa.fd< ~enllS,.of
selections which permit you to choose program functions and
guide the operation of the program; and data entry blanks which .
provide a place for you to enter any information which WAITSUN
requests of you. In general, you will notice that certain areas of the
screen are reserved or used consistently for certain purposes. This
use of the screen is "mapped" as shown below:
Current screen title - this tells you what menu you are in.
General display area - displays current building information.
3. Message line - "Action" line which tells you what to do
next (gray and black).
1.
2.
4.
Input line - gives you feedback on the current action you've
chosen or prompts you to ent~r information (black and white).
5. Menu line - displays current choices available (gray and
black).
The illustration below is a representation of the display screen.
CURRENT SCREEN TITLE
. ':'; :,~."'.
'.
.:_ -.;."-~::":;!.~J:':<:~:
;"
..,::"
General Display Area
Message line:
Input line:
Menu line:
. ,!,' "
.
~
: .,'
._.
:~;.; ..
• -"0',';'
8
Section IV
Symbols Used in Our Example
It will be helpful to the user to understand the following typographic symbols for this chapter.
c
BOLD FACE print indicates what you should enter as a
response to a prompt.
( ) indicates a single command key, such as:
(foI) graphic symbol for the return key (on your keyboard)
is represented in this manual by (RET) camage return.
(HOME) switches between "current" and "proposed."
(PC UP) page up to check first 10 options in Component
Menu.
(PC ON) page down to check second 10 options in
Component Menu.
,.
" "\;: ',.<,.
(t) scrolls up to previous component type.
(J.) scrolls down to next component type.
(,
(0) deletes type, area, and cost.
(ESq takes you back to previous screen.
(E) edit data (help mode only).
(+-) backspace key.
('\!) shift key.
. '_..,'
,' .• r·
• ' _, ", _,' __ ,:i ,,- .
(CAPS LOCK) cap lock key .
"Enter" means to type something on the keyboard. Entries are
usually followed with a return key to proceed. "Press" means
touch the pertinent key and WATfSUN will proceed.
(
c
EntermgDiJfa
Menu Selection. Select a number from the menu line correspond. ing to the menu for which data will be entered of Edited,''"'·'"
.,',,'
Entering Data. Select a letter corresponding to the information to
be entered Or edited. Now, for a construction type, select anumber
from the general display area that corresponds to the construction
type. Toenterareasorincremental costs, select the appropriate letter corresponding to area or cost and then enter the areas or costs.
Help vs. No Help Runs
Shortly after starting up WATTSUN, you will be asked if you want
help running WATTSUN. If you do want help, press Y when
asked. Help provides additional feedback to the user to check that
the current selection is desired. It also gives the user the opportunity to escape without affecting data or going to the next portion
of the program. Running WATTSUN with help also requires you
to enter E for edit prior to entering information in the Building
Component Menu.
Note: When in doubt about what to do next, read the message line
at the bottom of the screen to see what WA1TSUN is asking for.
r,.
'..
.
I'
.. ,"
10 Section IV
Start the WATTSUN program accordin .. to the instructions in the
previous section.
<T
c:
You should see:
BlllEVlill PMR All4IHISTRATIOO
llelc... s You To
UTTSUN version 3.1
The Official Software of the 5u!ler GOOD CENTS Prog".
Based on annual space heating load curyes deyloped by Ecotope Inc. of
seattle. NA ooder IIPA contract No. ilE-AC79-85IIP21380. U-Values are deriyed frOI
ASIIlAE Handbook of FtIldaoentals consistent with those used in the
Super GOOD CENTS pr~...
The N""in9ton State Energy Office and the Bonneville Power Adlinistration
lake no warranty, express or il(Jlied. or assUle any liability for the accuracy,
coopleteness or usefulness of this product. Actual energy consuoption will vary
due to differences in cliaate, occupant lifestyle. and construction details.
00 you want helD with the .. nus (y/nl?
The program asks you if you want help. Enter:
Y (REI)
; > ""'.':" -.... ,.. ..
:~
...........
(
After a shorfpause, you shOlIId
.
.
see:.
NATTSlIt YJ,IHAIH IfI«J .'.
.
ItIuse 10 .:. Council Prototype Ranch
House Site: 1002 IE IDlladay
lluilder : Haster lluilders
ID.. owner: .be Regional Average
IlIAllflCATlIII ClUTERIA
Therlal PerlorlaflCe (Btu/tt2 01 floor!
Energy lludget (klCl/tt2 01 floor)
..'. -;:<
Utility,. :
Analyst' :
location :
floor Area:
.
','
BQonev iIIe PoNef'. Mlln
Harris
Portland. 00
1.350 1t2
CUrrent
Proposed
0,3«
5,47
0,21~
28,5( 8,SkIll
17,5( 5,SkN)
1023
1,95
lEAT1trl SYSTEM
Heating Syste. Size in kBtu/hr (kill
Total Annual Au,iliary Space Heat (k1Cl)
0.822
ECIIIIIIICS
first Year Monthly PlTltEnergy ($/10)
30 Year Ule Cycle Cost ($)
$685,47
$701.88
$88. ~48, 14
$115. 742, II
Press nulller 01 .... choice or <ESC> to DUit
,
1-1.0, 2-t(Ml(Wff 3-00 HIlCAlIIII 5-SIUR HCOO 7-t£.\T SYS, 8-PlUNT 9-fILE'
You should be in the Main Menu with information from the default home shown, You can edit this default file or you can create
your own new fIle, as in the following example,
c
".",-.'
12 Section IV
'."
WATISUN Example Run
(
Creating a New File
Let's start by creating a new file for the c""ent and proposed example inpu t forms enclosed. Creating a new file requires that you
enter information in a pre-programmed sequence of events. While
in the Main Menu, enter:
9 (RE1)
You should see:
IfATISltI V3.1: FlLIH6 IElIJ
..
'!'
... -.
aMNT OOILDING FilfS AVAILAIli IN OIIECTOOY .:
IffAllT .lID
":".';'
Press nulber of aenu choice or <ESC> to Quit
HIJ.ij) 2-SAVE 3-/£11 4-iJlIVE 5-lffALlT
(
SectionlV
c
13
Now, to aeate a new file, enter:
3 (RE1)
""~"" ':
Youll now
h~';;'a tone. Press (RET) to confirm. You should
see:
...
'.
.
NATTSlN V3.t WILDING IOfNTIFICATICllIEIIJ
Ib"se ID :
!bus. Sit.
lIIIild.r
I'tIllwwner :
utility
DlN£VIllE PONE!! I!IIlNISTRlTIOO
An.lyst
:
Pr.ss ."Ib.r 0' Ie"" choice or <ESC> to QUit
HWSE 10000IFICATIOO 2-AlUESS 3-BUllOfR HO£OIt6I 5-UTIlITY 6-IoNAlYST
Let's begin by entering the name of the house identification from
our example. The house identification should describe the house
type, i.e., ranch, basement, etc. Enter:
1
(
(RET)
You are asked to enter house I.D. Enter:
EXAMPLE RANCH (RET)
14 Section IV
You are then asked to enter the house site. From our example, enter:
('
5001 MUD BAY RD OLYMPIA, WA (RET)
Now enter builder. Enter:
TEN PENNY CONSTRUCTION
Now enter homeowner, utility, and analyst from our example worksheet using the same procedure. When you reach the utility entry,
you must press (5) to enter "LOCAL UTILITY". When complete, you
should see:
MAlTSW 13.1: BUILDllli lOEHTIFICATlOO
House ID
House Site
l!IJilder
Iioaeowner
Utility
Analyst
• . . . . . -0-
'.f"
IE!«)
EXIJIllE RANCH
5001 IU) BAY Ill. (tYJIlI!. MA
TEN PBff( COOSTIIXTIOO
JJE IO£IlIII£R
: LOCAL UTILITY
Et£llGY JJE
" '
Press nuliler Of tenu choice or <ESC> to Quit
. \i:',,:"
HUlSE I[{)(1IFlCATIOO 2-AfOO[SS 3-BUILDER HO£OIlNER 5-UTlLITY 6-ANALYST
(
Note: In the "new" file sequence, the program automatically
prompts you for the next J.D. entry. You can always go back and
change any J.D. input by typing the number corresponding to the
change and the new input and then return.
To inpul'lloor area, press:
C
(
c(ESq
. ",
-
'
) . -.,
:~
~
You shoull! see on the lower three lines:
.
IfATTStIl Y3.1: BUILDING IIENTIFICATII»lIEIIl .
!buselD : EXAIfllE RANCH
!buse Site : 5001 lUI BAY Ill.Il.YII'IA. NA
INUder
: TEN PftflY COOSTlU:TIIIi
lI1Ieowner : .00 OO£OHR
Utility
LOCAL UT!LITY
Analyst
: El£JlGY J(f
Enter ne. floor area or Dress <ESC> to ouit
Enter Qualitvino floor area:
1-tJOOSE IIENTIFlCAllIIi 2-AlIR'SS 3-IIUllWl HlIl£OHR 5-UTILITY 6-ANALYST
You are then asked to enter the heated floor area from our example. Enter:
1400 (RET)
c
'I •
',:
;,"
"
16 SectioolV
The next automatic step will take you to the Location Menu. You
should see:
wmSlll Y3.1:
('
lOCATIOO IEHJ
~
Good Ceot. IlI.Hfication COIl be e,alu.ted using either:
Portland (Zone t < 6000 IIXI)
Spolcane (Zone 2. 6000 < IIXI < BOOO)
Mlssoul. (Zone 3. >8000 IIXI)
Olheroise us. the loc.tion lOst typical of your .re•.
He.ting degree d.ys (base 65) are listed in 0 .fter the loc.tion.
:
;;,
I2345678910 II 12 -
Astorl •• OO (5248)
8illings. NT (7049)
Boise. 10 (58021
CUtbillll<. NT (8700)
Oi !lon. NT (8370)
Glasgow. MT (8996)
Great Falls. NT (7652)
Helena. NT (8196)
lewiston. lO (5436)
lewistown, NT (8000)
Medford, 00 (4798)
Miles City, NT (7723)
13
14
15
16
17
18
19
20
21
22
23
-
Missoul •• MT (7839)
Horthbend. 00 (<IS61)
OIyopi •• N~ (5719)
Poc.te!lo.lO (7123)
Portl.nd. 00 (4691)
RedlOnd. 00 (6741)
5ale~ 00 (4974)
Se.ttle, N~ (5121)
Spok.ne. N~ (6892)
Mhidbey ISI.nd. N~ (5609)
Yaki ... N~ (6031)
Enter nUMler of new location or <ESC> to Quit
location nUlber:
CUrrent location is
Portl.n~
00
You are asked to enter the number for your location. Our example
is number 17. Enter:
17 (RET)
You should see PORTLAND, OR in the message line. Press:
(RE1)
The program then loads the climate data you've specified. Once
you've entered the location, the program moves into the Building
Component Menu.
(
c··;
You should .See:
.
: ~, i
,
'-'
.
tiTTSUI \'3.1:. IlJllDllIl ClH'llflllIEIIJ
-"
;
CIH'IIfIII
I BELIJI IiRAIE NAL1./FI.Im
2 SUB III IiRAIE
3 mAil SPACE Fllm
4 ABOYE IiRAIE NAIl
5. NINlOIf
6 DOOO
7 SKYLIGIfI
8 CEILIIIl
9 AIR l£AKAGE COllIn
0 TIEIIW. MASS
TOTAlS;
aRENT . PID'OSED
UAc
lIAp
..
i' :..
,.-'
..
.
. -laRENT-f'RI'OSED)-UAc-liAp OC. COST COST/UA
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
SO.OO
SO.OO
SO.OO
SO.OO
SO.OO
SO.OO
SO.OO
SO.OO
SO.OO
SO.OO
0.0
0.0
0.0
SO.OO 0.O$l8tu
WAlIFICATlIII ClUlEHIA
Thorlal Perforlance I8tu/ft2 floor)
Energy 8ut1get (k1fh/ft2 of floor)
CUrrent
Proposed
0.000
0.00
0.000
0.00
Press nuober of lenu ctwice or <ESC> to ouit
HlASltf[ 2-SUB 3-cRtlSPC HAIl 5-lWJIf 6-1lOOR 7-SKYLJl 8-CEILJ«;
9-1~
G-MASS
You should now be in the Building Component Menu. You
can always get into the Building Component Menu by typing
number 2 while in the Main Menu.
c
Remember that if you want to do an economic analysis, you
will need to enter information on both the current and pro. posed home. If you are checking compliance with Super Good
Cents, or relevant energy codes, you need only to enter that
home's insulation levels and areas as the current home. For
each component, 10 different construction type components
can be entered.
18 SectklnIV
Economic optimizations can be done by evaluating the $/UA
column in the Building Component Menu. The lower the value,
the better the investment. Let's begin by entering the building
component information from our example worksheet. Since the
components are listed "from the ground up" in the same way you
would build a home, let's start with the Crawl Space Menu. Enter:
(
3 (RE1)
You should see:
WATTSlIl ¥J.t: IEMJ If CRAIil SPACE FLOOOS
IlJliJer
I
2
3
~
5
Construction Type
A-II troder Floor
A-19 lfiIer Floor
R-25 lfiIer Floor
A-30 Il1der Floor
OTtER
U-Value iBtu/lt2-fh)
.051
.O~I
.036
.031
0
Press <Pg{Jl> to view next lenu page or
i:RA1il SPACE FlOO1 Ill. t
U-Value
Btu/ft2-flI
0.000
0.000
Construction Type
curr:
prop:
SUHHAIIY FOO CRAIL SPACE FLIffi
current:
",ooosed:
<Pg~>
Area
It2
0.0
0.0
to view previous page
C05t/lt2
UA Total Cost
$/lt2 Btu/f-hr
$0.00
0.0
$0.00
$0.00
0.0
$0.00
No. of Entries
I
I
Total UA
0.0
0.0
Total Cost
$0.00
$0.00
Press <l> or <1> to scroll cOIponent; <£> to edit data; <ESC> to Quit
·,
.. ' ..
.
~:
From our example worksheets, we have a current home with
1,400 ft2 or R-ll, and a proposed home with 1,400 ft of R-19. Let's
edit by pressing:
(E)
(
c
-
You calHhange the following parametersWithth~se'Collimarlds:
.
,_-~_"-'
CODUlWld
(I)
(A)
"
_ -
:
._',,'.
'-':"!:f',;H~;"id"';_,·:\-o;.,
,;-_";,,,-.
,., ~;f>YU~;~'~~:~r-, ;'\'J;"i':>';', •
Parameter
Component insulation levels
Component insulation area
. Incremental costs of insulation
Delete information
(0
(0)
You should see:
WATTSlIl Vl. t 0
IUIler
1
2
3
4
5
If CRAll SPACE FI.OOOS
Construction Type
R-1Itl1derfloor
R-19 tl1der floor
R-25 tl1der floor
R-:Il tl1der Floor
U-Value (Btu/ft2-Fh1
.057
.041
.036
.031
0
OTIER
Press <!'gIn> to vie. ",xt ...... page or <I'gl\l> to vie. previous page
U-Value
Area COst/lt2 UA Total COst
Btu/ft2-Fh ft2
$/lt2 Btu/F-hr
0.000
0.0
$0.00
0.0
$0.00
turr:
0.0
0.0
prop:
0.000
$0.00
$0.00
ClIlRfNT
Press <T> for consl. type; <A> for area; <C>tIst or <*> to de Jete
~. 1
Construction Type
CRAIL SPACE flOO!
Press <Ixl> to scroll
...
"'"
(.
CO~.; <lO£>
to change case: <ESC> to quit
You should see the word current or proposed flashing on the
right side of the screen. This indicates where your information
will be entered. The (HOME) key allows you to switch back
and forth between current and proposed. After completing
current, the program will automatically switch to proposed.
,';
'.;
,".
20 Section IV
To enter component type for the current home, check to see
that current is flashing on the screen. If proposed is flashing,
press (HOME). When cu"ent is flashing, press:
(
.
T
Enter the number corresponding to the R-ll insulation from the
"general display area" for the cu"ent home. Enter:
1 (RET)
The program then asks you for area. Enter:
1400 (RET)
You should see:
'."
. .,~; ~'.. .-:
I
2
3
4
5
IlATTSW V3.1: IEIIJ IF CRAil. SPACE FLOOOS
Construction Type
A-II Iklder Floor
A-19 liider Floor
A-25 liider Floor
A-3O Iklder Floor
OllEA
U-Value IBtu/ft2-Fh)
.057
.041
.036
.031
0
Press <Pg[Jl> to view next .enu page or
CRAil. SPACE FLOOO IIJ. I
CDnstruction Type
curr: R-tl lilder Floor
prop: A-II IXIder Floor
<Pg~>
U-Value
Area
Btu/ft2-Fh ft2
0.057
1400.0
1400 .0
0.057
to view previous page
Cost/ft2
UA Total Cost
$/112 Btu/Hr
$0.00
79.8
$0.00
$0.00
79.B
$0.00
Press <T> for canst. type; <A> for area; <C>ost or 0> to delete
I'Il1'OSEIJ
(
Press <txl> to scroll COIP.; <1-0£) to change case; <Esc> to QUit
.", <,~;~,;.\;/:;::'-»
',.;;\~.;.
;. '>,'-~'
,·f _
;-,.:}:~
r,{
.... ·
Notice thatihe current home h~~ be'ellaut()m~tkally entered as
the proposed case, and proposed is now flashing: This means we
only have I()t:hange the proposed type and specify the12 cents/
f!z costs from R-ll to R-19. To enter the R-19 as Proposed, check
that proposed is flashing and press:
. ' . ,. .. .
(1)
2 (RE1)
To record the costs, enter:
(C)
"
'.
.12 (RE1)
(ESC)
You should see:
NATTSlN Yl.1: IE/lJ If CAANl SPACE FlIJOOS
ftJlber
1
2
3
4
5
Construction Type
R-II Under Floor
R-19 Under Floor
R-15 Under Floor
R-30 Under Floor
OTIfR
Press <Pg[)'}> to view next
c
CAANl SPACE FlOOO No. I
Construction Type
curro R-ll Under Floor
prop: R-19 Under Floor
U-Value (Btu/ft2-fh)
.057
.041
.036
.031
0
IeOU
page or
<Pg~>
to view previous page
Area
U-Value
Btu/ft2-Fh tt2
1400.0
0.057
1400.0
0.041
No ot Entries
SLMWlY Fill CAAIil SPACE FlOOO:
current:
I
I
oroposed:
Press <t> or <1> to scroll
co~ooent:
:i
Cost/tt2
UA Total Cost
$/ft2 Btu/F-llr
SO.OO
19.B SO.OO
SO.12
57.4 $168.00
Total UA
79.B
57.4
<E> to edit data;
To~al
Cost
SO.OO
$168.00
<ESC> to quit
22 Section IV
c
Press:
(ESC)
You should see:
MATTSlIl V3.\: BUILDING COII'OIEHT IEHJ
ct.m£HT
UAc
POO'OS8J
COMPONENT
1 BELON GIlAIlO NALL/FLOOl
2 SLAB ON GIlAIlO
3 CRAWL SPACE FLOOl
4 ABOVE GIlAIlO MALL
5 MIllION
6 DOOR
7 SKYLIGHT
B CEILING
9 AlA LEAXAGE coolin
0 THEOO.L MASS
0.0
0.0
79.B
0.0
0.0
0.0
0.0
0.0
0.0
0.0
UAp
0.0
0.0
57.4
0.0
0.0
0.0
0.0
0.0
0.0
0.0
TOTALS:
79.B
57.4
IlUALIFICATlON CRITERIA
Ther .. l Perfor..."e (Btu/tt2 floor)
Energy Budget· iJcltl/tt2 of floor)
---ICUIlfHT-!'!IOPIJSfD)--UA,-UAp Itt. COST COST/UA
0.0
$0.00
0.0
$0.00
22.4
$168.00 7.5$/Btu
0.0
$0.00
0.0
$0.00
0.0
$0.00
0.0
$0.00
0.0
$0.00
0.0
$0.00
$0.00 .
22.4
$168.00 7.5$/Btu
CUrrent
Proposed
0.057
0.00
0.041
0.00
Press nUltler of lenu choice or <ESC> to Quit
!-6ASIflT 2-SLAB 3-alMLSPC HALL 5-MIIIOW 6-0000 7-SKYLIT B-CEILNG 9-11f' 0 MASS
Now let's enter above-grade walls. Enter:
4 (REI)
You should see'
-
......
IlATTSlII ¥l.t IEIlJ IF AOOiE 61lAIE IIAUS .
CoostrtJc:tlon Type
21<4 R-II Std
21<4 Std R-13.0.5 In Iso
21<4 Adv R-131O.5.1n Iso
21<4 Std R-13+1.0 iii Iso
21<4 AllY R-13+1.0 In Iso
21<6 R-19 Batt Std.
21<6 R-19 Batt Adv.
21<6 R-22 Batt Std,
21<6 R-2i! Batt Adv.
21<6 Std R-19+lin.Ext,PS
Press 4'gIkl> to view ne.t IeIIU page or
1
2
3
4
5
6
7
8
9
10
ABOVE 61lAIE IIAll lb. I
ConstrtJc:tion Type
torr:
prop:
U-Val...
Btu/lt2-fh
0.000
0,000
,
..' Ai>",' .
. ., •....
U-Value "lItuIft2-fhJ
JI1I2
~
~>
lrea·
1t2
0.0
0.0
<-
.C163
.116
.051
.049
.064
.057
.059
.055
.046
to view preyious page
Cost/lt2 III Total Cost
$1m IItu/F-tr
SO.OO
0.0 SO.OO
SO.OO
,00
0.0
SlHlARY Fat ABOVE 61lAIE MAl!;
lb. 01 Entries
Ctrrent :
1
orooosed:
1
so
Total III
0.0
0.0
Total Cost
SO.OO
SO.OO
Press <I> or <I> to scroll cooponenl; <£> to edit data; <6C> to quit
.
To enter the wall information for current and proposed from our
example, enter:
.
f.!.'~~;:~~:::~~~<'~';~'.:;"l~,..:a:~.-i':'; -"i!;~'<-I'I"~V"~-!I't"-~-,.s~.:,·",.. ··:;
(E) [Check to see that current is flashing.)
(1)
1 (RE1)
(
1244 (RET)
(1)
7 (RE1)
(C)
... ,.,.;.,,".'; :
, . 1. .
24 Section IV
.24 (REl)
(
(ESq
You should see:
-
lIATTSlIl
V3.1:' !
IIMJ IF ABOVE
. . -
NAllS
6RA[(.
U-Value 1Bt!llI,t2-Fh1
Construct,lon T)'pe
2>4 IHI Std '
.082
2>4 Std R-13+0.5 In Iso
.~
.06
2>4 Adv li-I~:~ in Iso
2>4std R-13+1;0 In Iso
.051
2>4 Adv R-13+1. 0 In Iso
.049
2>6 R-19 Batt Std.
.064
7
.057
2>6 R-19 Batt Adv.
B
2>6 R-22 Batt Std.
.059
9
2>6 R-22 Batt Adv.
.055
10
2>6 Std R-19+lin.Ext.PS
.046
Press <!'go.> tovie.. n,Kt oeOll page or <Pgl\l> to Vie, previous page
I
2
3
4
5
6
"','
... "!,.'
.
ABOVE
MAll. ,.,. I
construction Type
curr: 2>4 R-II Std
prop: 2>6 R-19 Batt AllY.
U-Value
Area
Btu/ft2-Fh It2
0.082
1244.0
0.057 '1244.0
6RA[(
stIIWlY FIJI ABOVE 6RA[( lIAU.:
current:
proposed:
Cost/ft2
UA Total Cost
$/lt2 Btu/F-llr
SO.OO
102.0 SO.OO
70.9 $298.56
SO.24
,.,. 01 Entries
1
1
Total UA
102.0
70.9
(
Total Cost
SO.OO
$298.56
,
Press <I> or <I> to scroll cooponent: <E> to edit data: <ESC> to QUit
.... .. ,-'.....
_
'"
'.,
-
~
~.
-,.',
--
To enter another component, enter:
(ESq
....... ::.,-; ..
Now you are in the Building Component Menu. Now let's enter
windows. Enter:
5 (REl)
(
'-.C"-_, ;"
c·.
"
I,·
. i
··
f .
You should ~
.
..
,"
",
IItnwt NU WI" ~
, ..
.'
,
. 'fWjer
I!
!
~
111
. ji
"I
. I
; .~
17
f
'8
, 9
'10
tHal1le
NINXlW ttl. I
"
'
curr:
"
f~~;f~~'~E·~N.H;!F'; .~~.' !!{~:,:f,J~~:!\;r:'ii".,;i;Ui!'I~lt;!:"'j\
_:
CDnstrllttiOl1 Type
A.;O~
"
0.000
0.000
0,0
0.0
.,. 01 Entries
SUIIARY FIX! NIIOlt
Press <r>:iJr
.Area
Btum~' 1t2·
Tol-LIIA
CUI'I''II1t :
I
0.0
.' proposed:
I
.0.0
<'>,.to~croll c_~.<f> wedlt data:·.~
Total CDst
$0.00
$0.00
wquit
To enter the window information for current,and proposed from
our example, enter:
,,",.....•...•.~~.;'~. "~'::<-.:.-,;.~~,
. ->:/'-"
.
(E)
[Check that current is flashing.]
(T)
1
.:,
.-'.'."
(
(RET)
'168 (RET)
(T)
5 . (RET)
(C)
"'.-'
.
26 Section IV
2.55 (RET)
(
(ESC)
You should see:
IlATISW Vl.1: IEItJ If NltmIS
U-V.lue IBtu/lt2-fh)
Construction Type
.75
1111.1/4 in .• Met.1 Fr...
.67
1111.1/4 in .. TIM Fr...
1111. 1/4 in .• l1oOO Fr...
.58
.53
1111.1/4 in .• lltl w/St....
.«
5
1111.1/4 in .• TIM w/St....
.35
6
III I. 1/4 in .• 1Io1H1 w/St....
.64
7
1111.1/2 in .• Met.1 Fr...
.56
B
1111.1/2 in .• TIM Fr...
9
1111.1/2 in .• lIood Fr ...
.49
10
.48
1111. 1/2 in .• Met.1 w/Stor.
Press <l'gDl> to vie. next ..nu page or <PgL\l> to vie. previous page
ltJIber
1
2
3
4
NINlO1i No. 1
U-V.lue
Construction Type
Btu/ft2-fh
curr: 1111.1/4 in .• Metal Fr ...
0.750
prop: IXlI.l/4 in .. TIM w/St....
0.440
SlIIWlY Fill NIIfJOIt
Area
tt2
168.0
168.0
Cost/lt2
UA Total Cost
$/tt2 Btu/F-hr
SO.OO 116.0 SO.OO
73.9 $428.40
$2.55
No. 01 Entries
current:
DroDosed:
1
1
Total UA
116.0
73.9
c
Total Cost
$0:00
$42B.~
Press <I> or <I> to scroll cOl(lonent: <E> to edit data: <ESC> to QUit
" . ,-"
'~.-
," ,,; f:'_
,i,<"
To proceed to the Solar Menu, press:
(ESC)
Notice that you are now in the Effective Solar Glazing Menu.
This occurs when the window area in the building component
is changed. WATTSUN automatically takes the user to the Solar Menu to change the solar area.
There are additional inputs for solar area that you are asked
for after entering window components. You will need to enter
the direction and area of the windows in your building. For
(
....
, ..
,
,-'
this·exercise,you should enter the, specifications from the ex.
ample worksheet, You can always getbacklnto!tlleS.q!at
Menu by going to the Main Menu andtyplilg 5"This·wlll:·be .'
useful for changing window areas and direction; Remember;
the solar area in the Solar Menu must always be equal to'or
less than the window area in the Building Component Menu.
You can check this by comparing the total solar area to the total glazing area entered for UA for both current and proposed.
Remember to always change the window and wall area of the
Component Menu prior to changing the Solar Menu.
Note: WATTSUN solar inputs assume that all windows are un~
shaded. This tends to underestimate energy use and energy
savings. The no-shading assumption is acceptable for determining Super Good Cents compliance.
From our example worksheet, enter the window area;for each
direction in the current and proposed home by specifying the
number corresponding to the direction the windows face and
that area, for all directions in both cases.
c
. '.'.
"
.\
...
f'
"
28 Section IV
Remember to use the (HOME) key to switch between cases if
differences exist between the current and proposed cases, although we needn't do this in the example run. After entering
all the solar information, you should see:
("
IlATT!iII Y3.I: EfFECTIVE !aAR IUlINl
calculating effecti,e solar glazing for PortliHIlI. 00
1«). oolEHTATlOO
Area
CIJIINT
I of Floor
~.O
0.0
0.0
3.01
0.01
3.01
0.01
3.01
0.01
3.01
0.01
TOTAl. !aAR AlE.\:
168.00
12.01
168.00
t2.01
TOTAl. IUlINl AIL\ EHTEJED Foo UA
168.00
0.0
~.O
0.0
~.O
0.0
~.O
Press IkJIIber of ..nu choice or <ESC> to QUit
I-SouTH 2-SouTl£AST HAST
''',
.
,
,
PImlSEIJ
I of Floor
3.01
0.01
3.01
0.01
3.01
0.01
3.01
0.01
~.O
1 South
2 Southeast
3 East
~
!brtheast
5 !brth
6 !brthwest
7 llest
8 Southwest
.~.
Area
~-l«llTl£AST
0.0
~.O
0.0
~.O
0.0
~2.0
168.00
a.RENT
5-1mTH 6-l«llTHIIEST 7-IIEST 8-SouTHIIEST
To enter the next building component, enter:
(ESC)
The program will return to the Building Component Menu. Now
let's enter doors. Enter:
(
6 (RET)
(
You should see:
.
IlATmII ¥l.!: IEIIIIf IXXIIS
tllnstttxtllll TJIII
lHal.· '8ltu/ftHlll
\.JSIA nlfl HIlt tare iliad
.«1
\.JSIA f .H.C.1IIad II/Stra
.:12
,3]
1.151n fish Sid tare iliad
1.1510 F.S.C iliad II/Stra
.28
1.l5ln-7/161A .....1 iliad
.54
1.751n-7/16111 PIli IIdfStnt
.36
1.751n-1-I/81n Paallllad
.39
I. 751n-1-1/8In PIli _
.28
1.751n Foal v/IIIeno. at
.19
1.751. Foal ",0 lhertt.at
.4
Press <PgIn> t •• i.. next ..... page or 4'gI.\!> to .1.. pre.ious page
IUIber
I
2
3
4
5
6
7
8
9
\0
...Yalue
Ar•• Cost/lt2 UA Total Cost
BtuI,.tHh 1t2 , $lIte· Btu/F-III'
"
0.000
0.0
So.oO
0.0
SO.OO
0.000
0.0
SO.OO
0.0
SO.OO
00IlI No. I
Coostruction, Type
Ctl"f':
prop:
SUIWIY
IlIRHT
roo OOIR
No. 01 Entries
arrent :
Press <I>
IX'
<I> to scroll
~t;
I
I
Total UA
Total Cost
0.0
0,0
SO.OO
so ,00
<E> t. edit data; <ESC> to "It
To enter the door information for current and proposed from our
example, enter:
(E)
(Check that current is /lashing.)
(1)
'. ",';
~;:
.. :
..
3 (REI)
,.; ",
:.
(
42
(REI)
(1)
9 (REI)
(C)
..... :"
30 SectioolV
3.50
(RE"\)
(
(ESq
After reviewing the door data entered, enter the next building
component by pressing:
(ESq
The program will return to the Building Component Menu. Now
let's enter ceilings. Enter:
8 (RE"\)
You should see:
NATISlII V3. \:
'If,"
•. ' . • ;.
'
lEN)
llJober
Constructioo Type
R-30 2><6 .bis\, Std
I
2
R-30 2><6 .bis\' Adv
R-30 2><4 Truss, Std
3
4
R-30 2><4 Truss. AllY
5
R-38 .bist/Truss, Std
R-38 .bist/Truss. Adv
6
R-0f9 .bist/Truss. Std
7
R-49 2><6 .bist, Adv
0
R-49 2><4 Truss, Adv
9
R--£O .bist/Truss, Std
10
Press <Pgl)l> to vie" next
leOti
CEILlt«> No. I
Construction Type
ClI'r:
prop:
U-V.lue
Otu/tt2-fh
0.000
0.000
page or
!llIWIY FOO CEllIt«>:
It).
current:
prOjJosed:
If CEILINGS
<Pg~>
Are.
tt2
0.0
0.0
U-V.lue IBtu/ft2-fh1
.042
.035
.041
.034
.036
.027
.032
.022
.021
.029
to view previous page
UA Tot.l Cost
Cost/lt2
$/lt2 Btu/Hr
SQ.oo
SQ.oo
0.0
SQ.oo
SQ.oo
0.0
of Entries
I
I
Total UA
43.1
37.0
Tot.l Cost
SQ.oo
$126.00
Press <1> or <1> to scroll coepooent; <E> to edit data; <ESC> to quit
(
"'\'_t:K"',
',' ,>·C\
0. '. .
"J.'
Some components, such as ceilings, walls,and Wina~;ha\r~
more than 10 choices. Let's view more choices. Press;.",,,' ,
(PGDN)
You should
see;
IfATTStII V3.t IEIIJ IF CEIlOOS
-..
ConstrucU.. Type
II
12
IHiO 2x6 o.I>lsl. MY
IHiO 214 Truss. Adv
13
14
11-11 vaulted
R-19 Vaulted
R-30Vaulted
R-38Vaulted
OllER
15
16
17
U-value fBtu/1t2-fh)
.018
.017
.072
.049
.028
0
Press <Pglln> to vie. next oenu page
CEILIt«> til. 'I
Construction Type
prop:
current:
DroDosed:
IN'
Press:
(PC UP)
""
.. -
(
":1::'
-..,
."
<Pgl.\l> to viev previOllS page
Are.
CosUlt2
112
0.0
0.0
$/112
til. 01 Entries
StIIWlY FOO CEILIt«>:
Press <I>
IN'
U-V.lue
BtU/1I2-FlI
0.000
0.000
CUN':
i
.Oli
I
I
UA Total Cost
Btu/Hr
SO.OO
SO.OO
SO.OO
SO.OO
0.0
0.0
Tot.l UA
Tot.1 Cost
0.0
0.0
<I> to scroli COlllonent; <E> to edit data; <ESC> to quit
SO.OO
$0.00
·.. ;
.,'.
,..-".
'-"
:! •
"
~-
:
32 Section IV
You should see:
(
NATlSlJi V3.1: IEID IF ctILINGS
CoostnJction Type
R-30 216 .bist. Std
R-3Il 2x6 .bist. Adv
R-3Il 2x4 Truss. Std
R-3Il 2x4 Truss. Adv
R-3Il .bistITruss. Std
R-3Il .bistITruss. Adv
R-49 .bistITruss. Std
R-49 2x6 .bist. Adv
R-49 2x4 Truss. Adv
R-liO .bistITruss. Std
Press <PgCil> to vieN next
liJlber
1
2
3
4
5
6
7
8
9
10
ctILlII> No. 1
Constructi ... Type
curr:
prop:
lent!
page or
U-Value
8tu/tt2-fh
0.000
0.000
<Pg~>
Area
tt2
0.0
0.0
U-V.lue (Btu/ f t2-f11J
.042
.035
.041
.034
.036
.027
.032
.022
.021
.029
to vieN previous page
Cost/ft2 UA Tot.1 Cost
l/tt2 8tu/F-Ilr
$0.00
$0.00
0.0
0.0
$0.00
$0.00
I··-W
9.IIWIY FOO ctllllli:
cure-ent :
IlI'ODosed:
No. of Entries
1
1
Tot.1 UA
0.0
0.0
Tot.1 Cost
$0.00
$0.00
Press <r> or <I> to scroll cOllPonent; <E> to edit d.t.; <ESC> to quit
From our example worksheet we have 1050 ft 2 of R-30 standard
framing and 409 ft 2 of R-30 vaulted ceiling for the current home.
The proposed home has 1050 ft2 of R-38 standard truss framing
and costs $0.12/ft2 more than the current home R-30 standard
framing. The proposed home has the same 409 ft 20f R-30 vaulted
ceiling.
.
,
Let's first enter the R-30 standard framing type for the current
home. To do this you must enter the number corresponding to
the insulation type that you want. Press:
(E)
(T)
(
33
SectfonlV
3 (RET)
1050 (RE1)
Now iet's.enter proposed; Press: .
(1)
5 (RET)
(q
.12
(REI)
Yau should see:
MATTStIl V3. t
lEN)
construction Type
R-30 2x6 Joist, Std
R-30 2x6 Joist, AllY
R-30 2x4 Truss, Std
R-30 2x4 Truss, My
R-38 JoistlTruss, Std
R-38 JoistlTruss, My
R-49 JoistlTruss, Std
R-49 2x6 Joist, My
R-49 2x4 Truss, My
R-6O JoistlTruss, Std
Press <Pglil> to 'vieM next lenu page or
lI': CfIlIH6S
Wet'
I
2
3
4
5
6
7
8
9
10
.,
.
-.
U-Value (Btu/ft2-fIIJ
.0.42
,035
.041
.034
~>
.036
.027
.032
.022
.021
.029
to viet!! previDtJS page
U-Value
Area Cost/lt2 UA Total Cost
COnstruction Type
8tu/ft2-fh It2
S/ft2 8tulF-llr
curr; R-30 2x4 Truss, Std
43.1
SO.OO
0.041
1050.0
SO.OO
prop: R-38 JoistlTruss, Std
1050.0
37.8 $126.00
0.036
SO. 12
Press <T> lor const. type; <A> lor area; <C>ost or <I> to delete
P!Il'OSEIl
CflLIMl ,.,. I
C'
, '-.)
\
Press <!Xi> to scroll COIP.; _> to change case; <ESC· to quit
.
~'"
.
..
'
34 Section IV
,-~
We are now ready to enter our number 2 ceiling type
(vaulted). Pressing (,I.) allows you to enter another type of a
component. Pressing (t) allows you to view the previous
component type. You can always tell how many types of a
component have been entered for the current and/or proposed
home by pressing (ESC) for the component summary. Press:
(ESC)
(
(,I.)
You should see:
IiATTStII Vl.1:
IfJ«)
IF CEILINGS
COnstructi ... Type
U-Val". (Btu/lt2-fhi
.042
R-JO 2><6 Joist. std
R-JO 2><6 Joist. MY
.035
.041
R-JO 2><4 Truss. Std
.034
R-JO 2><4 TNISS. MY
.036
R-38 Joist/TMJSs. Std
.027
R-38 Joist/TNISS. Adv
R-49 Joist/TMJSs. std
.032
R-49 2><6 Joist. MY
.022
R-49 2><4 TNISS. MY
.021
R-6O Jolst/TMJSs. Std
.029
Press <PgI)l> to vi •• next IOnu page or <PgL\l> to vi •• previOUS page
~1Ib.r
".;' ", :)-' i;"
1
2
3
4
5
6
7
0
9
10
CEILIM> No. 2
Construction Type
curr:
prop:
U-Value
Otu/ft2-fh
0.000
0.000
SlNWlY FOR CEILlM>:
current:
oroposed:
Area
ft2
0.0
0.0
(
Cost/lt2 VA Total Cost
S/ft2 Otu/F-hr
0.0
$0.00
$0.00
$0.00
0.0
$0.00
No. 01 Entries
1
1
Total UA
43.1
37.0
Total Cost
$0.00
$126.00
Press <I> or <I> to scroll cotponent; <E> to edit data; <ESC> to quit
Press:
(PC ON)
(E)
(HOME)
(
c
(T)
15 (RET)
409 (RET)
You should see:
IfAmut ¥l.t: MOO (f CED.11llS
IUiler
II
12
13
I~
15
16
17
i
Construction Type
IHiO 2><6 .bist. 111'/
IHiO 2><~ Truss. 111'/
IHI Vaulted
R-19 Vaulted
R-30 Vaulted
R-J8 Vaulted
000
U-Value I8tu!ltHhl
.018
.017
.072
.06
.035
.028
0
,
Press <PgI)J> to view nell aenu page or
to view previous page
~
U-Value
Cost/1I2 U.I Total Cost
CED.11Ii No. 2
.1Ni
Construction Type
Btu/IIHh 1t2
$/lt2 BtuIF-ir
0409,0
curr: R-30 Vaulted
0.035
$0.00 .14.3' $0.00
0409.0
14.3 $0.00
prop: R-30 Vaulted
0.035
$0.00
Press <T> lor const. type; <P lor area; <C>ost or ( l ) to delete
PfO'OSED
Press <{><I> to scroll COIIIl.; <IDE> to change case; <[so to ",it
.
, ••<
' . . . . , - ~ .' •
(
Notice that the current and proposed have both been entered.
We do not need to enter any costs for the proposed home,
since both cases are the same. You could continue adding
more ceiling types using the (J.) commands. For this example,
however, we' have finished entering ceilinr, types. Always
check the component summary to see if all the types of ceilings have been entered. Press:
(ESC)
"
,.~
,
" ;.P'
36 Section IV
You should see:
(
NAllStII Y3.1: IDJ IF CEIUr«;S
ItJIber
I!
12
13
14
15
16
17
U-Value (Btul ft2-f!l)
.01B
.017
.072
.049
.035
.028
0
Coostruction Type
R-50 21<6 Joist. Adv
R-50 21<4 Truss. Adv
R-I! Vaulted
R-19 Vaulted
R-30 Vaulted
R-38 Vaulted
OllER
Press <Pg1J1> to view next
CEILlII> No. 2
Construction Type
curr: R-30 Vaulted
prop: R-30 Vaulted
8eflU
page or <Pgl\l> to view previous page
U-Value
Btu/ft2-Fh.
0.035
0.035
SLMWlY FOR CEILING:
current:
orooosed:
Area
ft2
409.0
409.0
Cost/ft2
No. of Entries
2
2
UA Total Cost
Btu/F-hr
$0.00
14.3
$0.00
$0.00
14.3
$0.00
$/ft2
Total UA
5U
52.1
Total Cost
$0.00
$126.00
c
Press <f> or <I> to scroll cOll4>Onent; <E> to edit data: <ESC> to quit
Let's go back to the Building Component Menu to finish adding the other building components. Press:
.~.',
,'. ,,J'';• . .
'"
,
;
.•.... ".
(ESC)
Now, enter the last two building components (air leakage control and thermal mass) without directions. Remember, (E) to
edit, (Tl for construction type, (C) for costs, and (ESC) to
change men us.
(
A Note About Thermal Mass: All residential buildings fall
into one of the first three mass types. If additional mass is
used, show it as mass #2.
When you have
compl~ those' entries, YO\l~riilid$ee:'ii"
aRIHT· I'III'OSEO
IXH'IIEIIT
1 8EI.OII 6IWE IfAI.I../FIJQI
2 StAB IW 6IWE •
3 awL SPAa: fUXII
4 AIIO'IE 6IWE IIIU.
5 NINXIIf
6 001II
751(11.100
8 CEllINi
9 AIR l£AI<AGE COOIIl.
o 1lEIIIAI. MASS
TOTALS:
UAt
0.0
0.0
79.8
102.0
126.0
13.9
0.0
57.4
134.3
4200.0
Wp
0.0
0.0
57.4
70.9
73.9
8.0
0.0
52.1
56.0
4200.0
513.3
318.3
flW.lflCATIIW DUTERIA
The.... I PerIOl'lillCt! fBtu/ft2 floor)
Energy IkJdget 8<1I1/1t2 01 floor)
Press _er 01
II!OO
i~ taIifiIr~"-
,.UAc-lllp'fJ/«:.· COSl . OOSTI\IA
0.0
0.0
22.4
31.1
52.1
5.9
0.0
5.3
78.3
SO.OO
SO.OO
$168.00 7.5S/Btu
$298.56 9.6S/Btu
$428.40 8.2S/Btu
$147.00 25.O$/8tu
SO.OO
$126.00 24.OS/Btu
$1700.00 21.7$/8tu
SO.OO
195.1
$2867.96 14.7$/Btu
current
Proposed
0.361
6.06
0.225
2.29
thoiee or <ESC> to QUit
I-BASIIIT 2-StAB 'H:IIII.SPt 4-IIIU. 5-IIIDI 6-001II 7-SKn.IT 8-CEIlHG 9-Itf' 0-lfASS
When you are certain that all the building components have
been entered correctly, press:
(ESq
c
36 Section IV
You should see:
(
NAllSlII V3. t IEIIJ If CEIlIlIiS
IbIber
1\
12
13
14
15
16
11
COOslruttion Type
2><6 ..,isl, Ad>
~ 2><4 Truss, Ad>
R-1\ Vaulted
R-19 Vaulted
R-3Il Vaulted
R-3D Vaulted
U-Value (Blu/112-Fh)
.018
.011
.012
.049
.035
.028
0
R~
om
Press <Pg[n) to view next
C£llING No. 2
~
page or
U-Value
Blu/ft2-fh.
0.035
0.035
COnstruction Type
curr: R-JO Vaulted
prop: R-30 Vaulted
SlMWIY FOR CEILING:
ctrrent :
""oMsed
Press (') or (1) to scroll
<Pg~)
Area
ft2
409.0
409.0
to view previous page
UA Tolal Cosl
CosI/ft2
$/lt2 Btu/F-hr
14.3
$0.00
$0.00
14.3
$0.00
$0.00
No. 01 Entries
2
2
c~nt:
Total UA
51.4
52.1
Tolal Cost
$0.00
$126.00
<E> to edi I dala; <ESC> to QU i I
Let's go back to the Building Component Menu to finish adding the other building components. Press:
(ESC)
· ~ .. : ..
Now, enter the last two building components (air leakage control and thermal mass) without directions, Remember, (E) to
edit, (T) for construction type, (C) for costs, and (ESC) to
change menus.
(
A Note About Thermal Mass: All residential buildings fall
into one of the first three mass types. If additional mass is
used, show it as mass #2.
,
'"
.'.,.
'.;',
IlIILOINl
aJl'UfllllEMI'fik::';; ,
,QIHNT ' PIU'OSED,
, -
aJI'UfIII
I BB.QI GIWl
2
3
4
5
6
7
8
9
0
MAmUI ¥l.t:
IIAI.l/FlOIIl
SlAB IIj GIWl. '
CRAIL SPACE Flom
ABO'/E GIWl IIAU.
NltmI
00IIl
5KlliGIIT
CEIlINl
AIR l.EAIWiE COOIn.
1IEIIIAL MASS
TOTAlS:
UAt
0.0
0.0
19.8
102.0
126.0
13.9
0.0
57.4
130
4200.0
0.0
0.0
57.4
70.9
73.9
8.0
0.0
52.1
56.0
4200.0
513.3
318.3
IlJALIFlCATlIIj CIIITERIA
Therlal Periorlilllce (Btu/lt2 floor)
Energy Budget (k1lh/lt2 01 floor)
'
UAp
""-.' ,;;
,-(an8t~~
" UAt-iJAjl ;"Jl£o'i:lJSl' aJSTI\J,\
0.0
$0.00
0.0
$0.00
22.4 ' $168.00 7.5$/8tu
31.1 $298.56 9.6$I8tu
52.1 $428.40 8.2$/8tu
5.9 $147.00 25.O$/8tu
0.0
$0.00
5.3 $126.00 24.0$/8tu
78.3 $1700.00 2t.7$/Btu
SO.OO
195.1
$2867.96 10$/8tu
current
fl'oposod
0.361
6.06
0.225
2.29
,
Press llUIber 01 oenu choice or <ESC> to ouit
1-iIASIIIT 2-SlAB HRIlSPC HAU. !HIOJII 6-IlOOl 7-5KYLIT 8-a:1lNl 9-IIF O-iIASS
When you are certain that all the building components have
been entered correctly, press:
(ESC)
c
,
,~.
'
"'
.. '.",
. ";'"
38
Section IV
Heating Systems
WATTSUN 3.1 will calculate the size of the heating equipment required to maintain a user specified indoor thermostat setpoint at
the ASHRAE winter design temperature for the location selected.
The user can adjust the winter design temperature, if required, for
any other location. The program calculates the size of heating
plant required to provide 125 percent of the home's heating requirements. You should see:
NATTSW V3.1: IfATING SYSTEN SIZING
IfATING SYSTEN TYPE
Proposed
CUrrent
Central Forced Air Baseboard ""aters
IfATING SYSTEN CDST
",'
Ie{)
$1000.00
IIJILDING IfAT LOSS
Illilding Envelope Heat Loss IBtu/F-llr)
513.3
Heating Syste. DJct Loss IBtu/F-llr)
10.0
Total Heat Loss: 523.3
.', ......
'"'' .
IlSIGH IHT LOAD in 8tu/hr (kN)
31B.3
0.0
31B.3
2(596.617.21<11)
14.959.214.4kN)
SYSTEN SIZE (1251) in kBtu/hr (leN)
31.01 9.5kN)
19.0( 5.5kN)
TOTAl. -AlH.lAI. AUXILIARY SPACE IEAT Ikllh/yr)
10tOi
TIleroostat set Point:
A!HlAE 97.51 Ninter Oesign Te",,:
Design TelPerature Difference:
.-
$500.00
". .. -
3685
70.0 deg F
23.0 deg F
47.0 deg F
Press nullber of aenu choice or <ESC> to Quit
-
j-TYPE HOST 3-ru:T LOSSES 4-TIEIMlSTAT 5-NINTER IlSIGH TEIflERAIlIE
...
-,
.
Noticedefaultvaluesare already entered with current as a furnace.
In our example we have baseboard heating in both current and
proposed homes. To review the various selections for heating systems, enter:
1
(RET)
c
S(fCUonlV
(
;-'~-"
89
To select baseboards, you will need to enter the heiiilllgsysiem
type for current. Enter:
.. . , . . .
..
You should see:
WATTSIIl V3.1: IfATIt«; SYSTEM SIZING IENI
IfATOO SYSTEM JYPE
CUrrOflt
Baseboard he.ters
IfATOO SYSTEM COST
$1000.00
Proposed
Baseboard he.ters
$500.00
IlUILDIt«; IfAT lOSS
Building Envelope ~.t loss (Btu/f-hr)
513.3
~.ting Syst.. Duct loss (Btu/f-br)
0.0
Tot,1 He.t loss: 513.3
IESIGN IfAT lOAll in otu/hr "'W)
2~.126.61
SYSTEM SIZE 1!25Il in l<8tu.ihr IU)
1.Il<W)
I~
959.21 UkNl
30.51 9.OI<N)
TOTAl AIWAl AUXILIARY SPACE IfAT I1<II1/yr)
TherlOst.t Set Point:
A9flAE 97 ..51 Minter Oesign Teop:
Oesign Tellleroture Oiflerence:
310.3
0.0
310.3
9760
19.0 I 5.5kNl
3685
70.0 deg f
23.0deg f
.7.0 deg f
Press IlUlber 01 ..nu choice or <fSC> to quit
1 TYPE HOST 3-1X.tT LOSSES HIEPIIOSTAT 5-lIINTER (fSI6N TEllPERA1IJIE
Let's enter costs of our baseboard examples. Enter:
2 (RET)
(
'-:". :"1",';'
Note: When using heat pumps or forced air furnaces, you must
specify the heat loss associated with ducts in unhe'ted spaces. To
do this you will need to know the R-value, duct siz"s, and lengths
in unheated spaces. Refer to Tables A and B in the Input Worksheet. Directions for the use of Tables A and Bare outlined below.
In addition, if you are using a heat pump, refer to Section VI.
If'
,I
:j.
40 SectiofllV
Duct Heat Loss
To calculate duct heat loss:
(
• Put the lineal feet of each size of duct in the "lineal feet"
column of Table B of the Input Worksheet
• Then find the duct size or dimension in the "duct size"
column in Table A (Input Worksheet).
• Move to the right beneath the appropriate R-value for that duct
size.
• The value appears in bold print.
• In Table B, multiply the lineal feet times the value in Table A
for each duct run.
• In Table B, sum the product lines 1, 2, and 3.
• This sum is the final number to be used for the heating system
duct loss.
.'.;.:
".
You will be asked to input costs for the current and proposed
heating systems. In most cases you can assume these costs to
be slightly lower ($800 vs. $1,000) for the proposed case since
the horne is generally more energy efficient. This may not be
the case for passive solar homes where large glass areas exist.
The heating system sizing is a "worst case" calculation, i.e., no
sunshine, and does not account for solar heating gains. Since
the current baseboard cost is the same as our example, we
need only to enter the proposed. For Our proposed example,
press:
(HOME)
800
(RET)
c
SeotionlV . 41
c·
You should see:
• NATTSal V3.1: IEATiNS SYSTEM SIl1N6IE11.1·,
lEATINS SYSTEM llT'E
Current
Baseboard heaters
IEATiNS SYSTEM COST
$1000.00
BUILDIN6 IEAT lOSS
Ilulldill9 fnvelope lleat loss IBtu/F-firl
513.3
lleating Syste. IU:t Loss IBtu/F-fir1
0.0
Total lleat Loss: 513.3
1fS16H IEAT LOAD in 8tu/hr (kNI
>.
.!
$800.00
318.3
0.0
318.3
14.959.2 ( UkNl
30.51 9.OkIll
19.0 I 5.51<111
rOTAL AIHJAL AUXILIARY SPACE IEAT IklltJ/yrl
TherlO.tat Set Point:
ASIflAE 97.51 Ninter Design Telll:
Design Teoperature Oifference:
PrOlMlSed
Baseboard heaters
24.126.6( Uklll
SYSTEM Silf !t25S) In k8tu/llr IkNI
(;W;'i;,'i)~f)~i1.!~~1:'#i;)i''lih:c;·;;r,,'·';;'N'::;;:'':i:;:ii;;'),;,
..;,',",
9760
3685
70.0 deg F
23.0 deg F
47.0 deg F
Pres. nulber of ..nu choice or <£SC> to QUit
1-llT'E 2-COST :rru:T LOSSfS 4-llEII«lSTAT 5-NINTER 1fS16H TElf'ERATlIIE
You can specify indoor thermostat and outdoor design temperatures by selecting the appropriate menu choice. Since our example requires no change, we have completed the heating
system inputs.
_":.<}'''',. ..: .•:.. ~-.:i-,·~,~'c:.~~,(;;..'r.;·~,,-I;(.
:,',
....... ,.
(
Note: The indoor T -STA T setting will affect the economics and
the heat system size but not the energy budget, which is
based on the 65°F indoor temperature assumption and cannot
be changed by the user.
To proceed to the Economics, press:
(ESC)
, .."<
'.,;.'
42 Section IV
Economics
To run economics, as mentioned earlier, you will need to specify the incremental cost of the proposed home's individual
components or specify the total (marked-up) costs as "other"
in the Economic Menu.
(
We should have already entered the incremental cost of our
example when we were in the Building Component Menu.
Let's select the Economics Menu now. You should see:
NATTSlII V3.1: ECOOIJIICS IlOO
Current
$75, 000.00
BASE PAle£:
I~T AL
""'.'
.
TOTAL PAICE
COSTS: En.. JOjll! lopr .....nts
Heating Syste. EQuip..nt
Builder Mark-up
Other
TOTAL I~TAL COST:
IBASEt!~ALI:
Pr incipalf-Interest
Property Taxes
Insurance
Incol!! Tax Deduction
IIllTlU PAYlENT:
Energy
TOTAL IIllTlLY PAYHENJ:
-
...
..,
.. .. ',
30 YEAR UFE CYCLE COST:
Pr1lpose<1
$75, 000.00
$2, ~7.!16
$0.00
$1.000.00
$200.00
$0.00
$1.200.00
$800.00
$733.59
$0.00
k <101.55
$76, 200.00
$7a <101.56
$705.<12
$127.00
$63.50
-$230.81
$40.67
$705.7B
$735.06
$ti6.17
-$2<10.50
$15.35
$708.<12
I8a 042.06
$88, 676.10
$132.~
~
Press nulber of aenu choice or <ESC> to QUit
I-l!.\SE 2-11TIfR 3-HAJl(lP HATE 5-TElJI 6-1OO11N 7-INC.1AX 8-f£. TAX 9-I1lS. H/KNH
. :....;. I:':,
From our example worksheet, enter the economics assumptions 1-10. To enter the base price of the current and proposed home (excluding heating equipment and incremental
costs), enter:
1 (RET)
77000
(RET)
('
..
I~~~'tr .
",',"'" ,i''':
Yoli~ii~cl\~~~'c)thei'ecOiloinic ~~sumplioris iilja'C6in~~J1jelp\!W, •.
.
witli ili1tW9tlf~heet lir:i>~~ing the'nil~~~rFo~~#c:Ii~8',t1>,tp~l:; ,
assl.ijltpilOijf'Jlor'examplli,"enter:'·' .' ..., .".. ..,.. ,
,,~).
Yoli'Shbilldsee:'
1EItI.
IIATTSlIl V3.1:
.
BASfPRICE:
$77.0Q0.00
ItOOooAl. COSlS:£nveloPO'iJiprOveoeritli' ,.
HeotlrH,jlit'ste.'t9<!liJII"nt'
&JlldeI':IIiir~~"'i
other' '" .,...,
TOIAl:~i('~T: . '
TOTAt'l'IUcE' !BASEtlI«:!£lEllTAll:: '
.$0,11<1 ,,'
SI. 0Q0.il() "
SO.OO
SL2O(I.00
$723.94
$130.33
$65.\7
Energy
TOTAl_V PAYIEHT: '
30 YEAR LIFE CYClE COST:
$2. 007.i16
S2OO.qo
S70.200,OO .
IKIITILY PAYIEHT:' Pr;ncipaHlnter,st
Property To.es"
Insurance'
In".. Ta. Deduction'
~
$77,'000.00
$8L«II.56 '
$753.58 .
$135.67
$67.B3
-$236.86
$40.67
$723.24
-$2~.56
$91.216.88
$90.1150.91
$15.35
$725.B7
Since this agrees with our worksheet, continue by pressing:
(ESq
.' ','.
,/
:
',.,
::
;_'L
44 SectiOllIV
Check all the economic assumptions. When finished, the Economics Menu should look like this:
(.
NATISlII ¥l.t EC(NJIICS M3II
BASE PIllet:
IIIJfIENTAl COSTS: En,elope 11Ilf'0,...nt,
He.ting Sy,te. Equip..nt
Builder Mark-up
other
TOTAl. 11IJfIENTAI. COST:
TOTAl. PIlICE IIlAS!'tIIIJfIENTALl:
lOWLY PAYlEHT:
\
'
.. '
Princip.Hlntere,t
Property Taxes
Insurance
Incole Tax Deduction
Energy
TOTAlIlllTll.Y PAYlEHT:
30 YEAR LIFE CYClE COST:
CUrrent
$77.000.00
$n. 000.00
Propo,ed
$0.00
$1. 000.00
$200.00
$0.00
$1. 200.00
$2. 867.96
$800.00
$733.59
$0.00
$.4.401.55
$78, 200.00
$81. 401.56
$723.94
$65.17
$65.17
-$223.83
$.40.67
$671.l!
$753.58
$67.83
$67.83
-$232.99
$15.35
$671.61
$85, 319.35
$84.711.95
Press nulber of lenu choice or <ESC> to quit
HilS!' 2-oTIfR HWIK!J' 4-IIATE
".-.• >
5-TElII6-~
7-Jl«:.TAX B-IE.TAX 9-INS. O-$/KIIH
Now that the menus have been completed, return to the Main
Menu by pressing:
(ESC)
(
,. ·.~~~~.;i~~jti'~·.
::-- ,':,\~,' :--'-;\~"-
.
DlJTEIIIA .
Plrreo\
f'rGIloWi
"fI1eI1<Il f!!rflll'liIIII:t •flilll/ft2 of f!qcIf)
of floor)
un
o.?25
3O.519.OkIll
19.0 I 5.61<111
9,7liO
3,685
..
~~, lli!a~~1 ~lI1Ifl2
~TIN!
6.Qti
2.29
tlYS,TPI
HPaU!19 &Y'\" SI!, Ip kPt!lilll' Iklll
T~IRI AI1r.\!~l A!lJmlll'Y ~ilCe ",~I 1k111l
ECIHlMICS·
Fll'1It Year I/Ontl!lV PITI~gy IS/III)
30 Yeill' L!f, Cy~I,!;lI:It 1$1
,~\: ....
. :.... : -. '.
$671.11
$16, 319.35
$671.61
$84.111.95
,
...... -
\\
46
SectiofllV
Printing WAITSUN
While in the Main Menu, you can print your program by entering:
c
8 (RET)
You should see:
MATISlI4 V3.1: mINT IENJ
I23~ 5-
Press nulber of
ctII'lfTE
&.IIWlY
IllILDIH6 COf'IlENTS
EaJO(ICS
I£ITlH6 SYSTEII
IfOU
choice or <ESC> to ouit
1-ClK'LElE 1 &.IIWlY 3-aJf'U£NTS HCINl4ICS 5-1£\TlH6 SYSTEII
·
-.~.
You can choose either a partial printout or a complete printout by
specifying the number corresponding to the printout desired. Enter:
1
(RET)
Get your printer ready, and press:
(RET)
It is good practice to make a printed copy of all new files before
you exit the WATISUN program.
(
9
<rum
2 (RET)
You should see:
moo IlOO
IlATIS1Jj Vl.t
CIRlNT IlUIlDING FlL£S AVAIUIlf IN DII£CTmy a:
iffAll.T .BID
"
'.
..
.:0 ".'--:
." ,
."."
....
'
.
.
,
Enter na .. of file to save or <ESC> to quit I.BID will be added .utDlOtically)
File na..:
HOAD 2-SAVE 3-I£M 4-!JUVE 5-DEFAll.T
.
(
Using 8 characters or less, give your work sample a name by entering:
EXAMPLE (RET)
.•~.
1
~.'f..,
.,.' .... ,.,•.
48 Section IV
You should see:
1lA1T~
V3.1: FILINi 1IJIl
(
ClIfENT IlUILDINi FILES AVAIlABLE IN DII£CTOOV .:
DEFAllT .BlD EXAII'I.E ,BlD
· ~ ,.:
C"
:
Press nulber of aenu choice
Gr
<ESC> to ouit
!-lOAD 2-SAVE HEM HlIIVE 5--DEFAllT
Your building file is now saved on the WATTSUN Working Disk
in drive A.
Note: You should be able to save 25-50 WATTSUN runs on the
Working Program Disk, or you can store WATTSUN runs on separate Working Data Disks in drive B,
To store the WATTS UN building file on the Working Data Disk in
drive B, enter.
4
(RET)
You are asked for directory A, B, C. Enter:
B (RET)
(
. ,~',~-;, ':>SThen save the building file by
el\tering~
""';ii'i,C'! '
2 (RET)
. -·:;;':\{.i~; :L,::::"~/~'i-i{,f";::~\
.' ,::;:~;5:'{<;:':
Enter:
EXAMPLB (RET)
.i
Your building file Is now saved on the Working Disk in drive B.
To exit WATISUN, retuin to
the.M~ Menuby' pressing:
(ESC)
From the Main Menu,
press:
(ESq
Youll hear a tone, then enter:
(E)
Creating Back-Up Data Files
It is important to always make back-up copies of information
you want to keep. The WATTSUN program allows you to store
different sets of building data on the Working Data Disk. To
back-up the Working Data Disk after an input session, do the
following:
1. Place your DOS disk in drive A and enter the command below, then preSs return:
DISKCOPY A: B:
2. At the prompt, "Press any key when ready", place the Working Data Disk in drive A and the Back-Up Data Disk in drive
B, then press any key. This will cop)' the contents of the
working copy to the back-up copy. Note that the former contents of the back-up disk will be overwritten. When asked if
,,","
.'
\
...
50 SectioolV
another disk is to be copied, enter N for no, then press return.
At the A> prompt, remove data disks and put them in a safe
place.
('
.
Summary of File Commands
Command
LOAD
SAVE
NEW
:.::
...
..,.:. ,
DRIVE
DEFAULT
"
l.~·"
:('. . .
Explanation of Command
Loads the file you specify from the current directory (disk), into the WATrSUN program.
Saves a file that you have created and named to
the current directory. (Directories: A = Drive A; B
= Drive B; C = Hard Disk).
Creates a new file which blanks out any default information presently in the WATTSUN program and
leads you through a preprogrammed data entry sequence.
Allows you to specify or change which directory
WATTSUN loads building files from, i.e" A, B, or
C.
The operator can edit default files, although it is
not recommended.
Editing Existing Files
All commands for editing files are the same as shown in the
"new file" example. When editing a building file, the user moves
into menus from the Main Menu by selecting the appropriate
number for the desired menu. To exit a menu, the user presses
the (ESC) key and the program will return to the Main Menu,
Time Saving Hint: When starting the program, the message line
asks, "Do you want help with the menus (yin)?" Type N. This
will eliminate the need to press (RET) when selecting a menu,
and eliminates the need to press (E) to edit. All other commands
will be the same,
(
Cost Data .
·9~e;VJewofCost'Accoun'tJng
iThe following cost Information was ctIinplled l>yilie Wa~hln~oit
. "'$tate Energy Office. Cost data were slfppUed from over 300 general contrac:tors who constructed 400 residences in Washington,
Oregon, Idaho, and Montana. These residences were built to
meet or exceed the Model Conservation Standards (MeS) and
the specifications of the Bonneville Power Administration's 'Residential Standards Demonstration Program.
The median (average) costs and sample size are indicated for
each component's .lncremental cost:
R-1. walls 2x4 studs 16" o.c:to R-19'walls'2x6 studs 24" O.c.
Median costs difference: $O.26/ft2•
Sample size: 48 residences.
Miiliinum-maxlmum range: 0-$1.71. .
You can use these tables to determine some of the cost information required by the WATTSUN economic analysis worksheets
and design optimizations. This cost data can also serve as useful
feedback to builders, utility persons, homeowners, architects, and,
engineers interested in evaluating energy conservation options in
new residences.
c
Great care should be taken when using this data since significant
variations occur in costs from builder to builder and design to
design. Because these homes were "demonstration" homes, the'
circumstances surrounding their construction are probably differ~
ent than most. Maximum and minimum costs are included to indicate the extent of these variations.
A short narrative on some components was included to provide
a better understanding of the origin of these costs and what they
include. The most accurate cost will ultimately come from the
2
Section V
specific builder and his sub-contractors. These cost data are supplied to complement that which the builder may already have.
All efforts should be made by the WATTSUN user to validate or
obtain cost data from his or her specific marketplace. The user is
encouraged to check with local insulation contractors, HV AC
contractors, equipment suppliers, and other contractors involved
with residential construction to validate costs.
C·
Cost Data Tables
Normalized Incremental Building
Costs - Group Analysis
In this section, we present a detailed analysis of incremental
building component costs normalized (standardized) by component area for selected groups of components. Those cases not included in a numbered group are analyzed separately as part of
the group "all other cases of increments." The building components are ceiling, floor, walls, basement walls, windows, air infiltration barriers, door, and air-to-air heat exchangers. This detailed
analysis will be of special value for home builders who are interested in the cost of going from one particular level of ceiling insulation, for example, to another level of ceiling insulation.
Moreover, this chapter contains the "cleanest" data because unusual cases are not included in the analysis.
(
(
;
t
I
~.
.~...
,
~--JE:
~
';c~
~
··i:~;.:<:
-
~:s:
:.:?"'.:'~
.~
;~
~
~,¥;
',':::0
~:i+
~§'f
~
"-~~i,
I.
~
i
,
I
".?
:j~.
,
;.
~-:t-
I
i"
~I'
~
"
f.
.T.ft
...
'x
~,'
-.'~""O-:
-· .-'. .·-'·1;;
I
~~I­
..-~t·
.,:~~;
'~
I.·
.~.
'-i%-
,
"---:~~k
I
:·f
-<:~.
.
".~.
:~.
~,
~
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I;~
'.iP',..
Table 1
Incremental Costs Per Square Foot of Basement Wall
By Types of Increments
-$
~
Group
No.
1
2
3
4
5
All other
Current
Practice
R- 0
R- 0
R- 0
R- 5
R-ll
cases
Mean
($/ft~
MCS
Type 15
R-ll
Type 15
R-19
Type 22
R-I0
Type 14
R-I0
Type 13
R-19
of increments
Type
Type
Type
Type
Type
15
15
14
14
13
0.46
0.80
1.15
0.54
0.42
0.61
Standard
DeViation Median Min.-Max. Sample
Size
~/ft~
~/ft~
~/h~
Q.22
0.36
0.22-0.88
12
0.40-1.19 ... 9,
0.30
1.01
0.47-1.98
0.77
0.99
3
0.60
0.23-0.75
Q.22
4
q.49
0.22 -0.09-1.49
16
0~75
0.59 -1.21-3.25
62
B......mt Wall Type Code
13 All weather wood foundation.
14 Cement, foam ou1side.
15 Cement, batt inside.
21 2><', ;6" O.c. standaxd framing.
22
No insulation on foundation.
For current practice, Type 15 includes Type 21 and 22; and
Type 13 includes Type 15.
For MeS, Type 15 includes Type 21; Type 13 includes Type
15; R-ll includes R-13; and R-19 includes R-22.
-
'<
Co>
,
i..:
.. '
,~
.
~{
. :;.':
"
;~?;/
·,.i
-
,
t~
~
~
..
;,1
,;;.
"-,,~
....
Table 2
Incremental Costs Per Square Foot of Floor
By Types of Increments
Current
Practice
Group
No.
I
2
3
4
5
6
7
8
9
10
All other
(S/ft2)
Standard
Deviation
(S/ft2)
0.13
0.40
0.37
0.32
0.60
1.02
1.52
1.49
0.80
8.97
0.71
0.08
0.42
0.11
0.17
0.41
0.85
0.57
0.77
0.29
15.53
1.83
Mean
MCS
R-ll Type I
R-19
R-ll Type I
R-30
R-38
R-11 Type 1
R-19 Type 1
R-30
R- 0 Type 2
R- 5
R- 0 Type 2
R-lO
R- 0 Type 2
R-15
R- 0 Type 3
R-10
R- 5 Type 3
R-lO
R-15
R- 5 Type 3
cases of increments
Type
Type
Type
Type
Type
Type
Type
Type
Type
Type
1
1
1
1
2
2
2
3
3
3
~
(')
~
Median Min.-Max. Sample
Size
(S/ft2)
(Sift»
0.11
0.30
0.40
0.27
0.43
0.76
1.22
1.36
0.72
2.91
0.21
0.02- 0.54
0.11- 3.03
0.11- 0.47
0.14- 0.67
0.07- 1.14
0.04- 2.76
1.17- 2.18
0.46- 3.12
0.36- 1.42
0.12-36.50
-0.64-11.80
61
48
9
12
12
9
3
16
12
5
67
Floor Type Code
I
Crawl space (Insulation under floor or overhangs).
2 Slab below-grade.
3 Slab on grade.
S Slab/foam insulation.
~.
FO>" curren. practice, Type 3 includes Type 5.
For MCS, Type 2 includes Type 5; Type 3 includes Type 5;
R-5 indudes R~ and R-7.
R·I0 includes R·7, R-B, and R-12; and R-19 includes R-20.
~
'~' -'
i.-...,
...:
-;:.
~
;~
;'"
11,
.'
1
1
1:
'.t
t
j;:
.~~::;,
, :;}l~~
.-:="'"
',;-:··,1;:
~~~.
~;~..
r
.~~if:
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.
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f@£.
1,
',:,'
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:~
.,.
t
2i.i;~~:~
1<
!.
?
, ~:z:,
mt
-Ji~~ :
:;;
.,
.~
G
.f:
I
;.'-
n
!~
-:-,..
...
~-;.'
~
/
Table 3.
Incremental Costs Per Square Foot of Wall By Types of Increments
Standard
Group
No.
t-,.
.
;.t.~
Practice
1
2
6
3
4
R-ll
R-ll
R-ll
R-ll
R-11
R-ll
5
R-ll
8
7
R-ll
R-19
9
10
R-19
R-19
11
All other cases
Strapped wall.
Double wall,
2x6, 24" O.C., advanced framing.
2x6, 24" O.C., standard framing.
2><6, 16" O.C.. standard framing.
2x6, 24" o.c., foam outside.
2x6, 24" o.c., foam inside.
2x8, 16" o.c., standard framing.
~/ft2)
MCS
Type 21
R-19
Type 21
R-24
R-27
Type 21
Type 21
R-27
R-26
Type 21
Type 21
R-27
Type 21
R-30
R-27
Type 21
R-27
Type 4
Type 4
R-31
Type 4
R-38
of inaements
Wall : )],. Cod.
1
2
3
4
5
6
7
12
Mean
Current
Type
Type
Type
Type
Type
Type
Type
Type
Type
Type
Type
3
7
7
1
12
2
2
6
6
2
2
0.29
0.70
0.74
0.87
0.68
1.03
0.64.
0.87
0;32
0.98.
0.92
0.89
Deviation Median. Min.-Max. Sample
~/ft~
~/~
0.26
0.39
0.31
0.40
0.26
0.71
0.78
0.94
0.68
0.93
0.61
0.90
0.26
0.83
0.90
0.72
0.03
0.34
6;13.
0;23
0;28
0.67
0;50
0:86
~/~
Sbe
0-1.71
48
-O.42~1.88
29
0-1.39
0.24-1.51
0.63-0~70
0.86-1.30
0.51-0_82
0.48-LlS
-0.15-0.81:
18
20
4.
3.
4;
6
0.I~U6
14
.$,
0.20-1.66.
-0.42-4.95
88
19 2><6,24" 0.<', mod..advanced framing with foamOQtside.·
21 2x4, 16"o.c., standanI hamingo
:i'"
Forcwrentpractice, Type4 includes Type 5;R-ll includes
R-13.
For MCS, Type 3 includes Types 4, 5, and 17; Type 6
includes Type 19; in gro..p 2, R·24 includes R-25; in group
3, R-27 includes R-28; in 'group 9, R-27 includes R'25, R·26
and R·28; R-31 includes R·33 and R-34; and R-38 includes
R·37; R-40, R-41 and R-43.
.
ff
a
8
<.
ICIt,
,0"'
.:-7
,
.
,
.
i'•
.~
.~?;
·'·t
Table 4
Incremental Costs Per Square Foot of Window
By Types of Increments
."
f€l
t)
Current
Practice
Group
No.
($/ft2)
Standard
Deviation
(S/ft2)
3.11
1.48
2.70
0.87- 7.30
41
2.28
1.53
2.66
0- 4.79
9
4.16
2.42
3.24
2.24- 9.77
10
3.55
2.48
3.48
1.10-10.26
17
2.61
1.38
2.34
0.68- 6.91
21
2.72
4.30
1.38
-6.03-22.55
66
Mean
MCS
DC·
TC··
Type 1
Type 1 TB
2
DC
TC
Type 1 TB
Type 1 TB
3
DC
TC
Type 2
Type 2
HM···
4
DC
Type 1
Type 10
DC
5
DC
Type 1
TB
All other cases of increments
1
Window Type Code
TB Thermal break.
1
Aluminum slider.
2
4
6
7
S
Wood slider.
Wood casement.
Wood Axed.
Aluminum,
Wood.
~.
9
10
12
14
Aluminum,
Median Min.-Max. Sample
Size
(S/ft2)
<S/ft2)
• Double glazing.
•• Triple glazing.
•.. Heat mirror.
thermal break..
Alwninum heat mirror.
Wood, awning.
Wood, double hung.
For current practice and MeS, Type 1 includes Types 7 and
9; Type 2 includes Types 4, 6, S, 12, and 14.
.?,
.;:;
,1'"'"'\
s:t
§
oc:
2
>'f.
";;.:,
":~'
ft,,
.,"'::
.~
t
.~,
"'
~'ii'
~
~&~jt
~I:
.;:
,'",t·g.:
-~
'];;'J;"
.~:~'.::J:~~:':"
. '~:!';i
--":!>~:
':~}~-
'.=..
!,;
\~~.
~.,t,
:w
:~.
i
i
.rL:-.-·
"~:'i:;.',. '
-"~-':;.~
~
,U
'.lj~
",
.·;rx~·:
'_:n"::C
k
i;;
:.~
:~4
.......
.=.:.-.:.t
~.
~
'
C~:.'Ei'~"
re
r:
>:~~~~
~~c
.10.;
j:
. '$
-"".;or-'
il
-~
::~'.F.
,
,;;,,",",
·~~t
.j:,=-.;.'.
.~~~~.
,,-~;
';i'~~
j-
-~~~
.
:~
. 6'
,
:.'!-.",
t
~.~.
{.~ ..
'~3~~:'
'~.::~ .
/;p
:1i:
.~.
0
Table 5
Incremental Costs Per SquareFQOt of Door Barrier
By Types ·of Increments
Standard
Group
No.
Current
Practice
t
Type 2
All other cases of increments
Median Min.-Max; Sample
<SIft%)
<Sift%)
Size
Deviation
MCS
Mean
'(SIft%)
Type t
3.70
·3.78
3.38
-8.25-15.95
80
1:68
,'2.93
0;66
-0.57.1653
140
($/M
Door Type Code
I Insulated dad loam tore.
2 Wood solid tore.
f€l
..~
j
'<
...
,
,.
1
1
'
Table 6
Incremental Costs Per Square Foot of Ceiling
By Types of Increments
00
~
<)
Group
No.
Current
Practice
R-30
R-30
R-30
R-38
R-38
R-38
R-30
R-30
R-30
9
10
R-30
11
R-30
12
R-30
All Other cases
I
2
3
4
5
6
7
8
Mean
MCS
Type 8
R-38
Type 8
R-49
Type 8
R-60
Type 8
R-38
Type 8
R-49
Type 8
R-60
Type 5
R-38
Type 5
R-38
Type 3
R-38
Type 3
R-38
Type 3
R-38
Type 8
R-38
of increments
Type
Type
Type
Type
Type
Type
Type
Type
Type
Type
Type
Type
($jft2)
($/ft 2)
0.44
0.49
0.63
0.31
0.30
0.45
0.26
0.61
0.44
0.22
0.43
0.20
0.57
0.26
0.53
0.14
0.29
0.09
0.20
0.27
0.24
0.15
0.18
0.24
0.37
1.40
1
1
1
1
1
1
5
6
2
3
1
8
Ceiling Insulation Type Code
1 Attic, advanced truss, loose-fill insulation.
2 Attic, advanced truss, batt insulation.
3 Attic, standard truss, baffle, compressed batt perimeter.
S Vaulted, batt, no foam.
6 Vaulted. batt. foam inside.
8 Attic, standard truss, loose-fill insulation.
~.
Standard
Deviation
~
Median Min.-Max. Sample
(S/ft 2)
(S/ft 2)
Size
0.39
0.30
0.58
0.20
0.28
0.44
0.21
0.49
0.38
0.16
0.33
0.08
0.31
00.160.5300.160.2200.420.300.090.28-
1.24
2.40
0.83
1.34
0.44
0.79
1.05
1.04
0.73
0.56
0.78
0.D3- 1.57
-0.57-12.40
'<
65
17
4
25
9
10
19
10
11
6
4
16
83
For MCS. R-49 includes R-50 and R-51; R-38 includes R-40.
R-42. R-43. and R-44.
.~
j",,',
.:'
.~
..
~
'~5<
.~·t
"
~§
c:~"
,~
wi.
J
""".
,,f:;,;
~~~-' '
";:;l
'.'-=
1
-~·r
~~..;:
:~.
I
:t
y
. 'so
j
t
'~~:l
I
,
,:~~.
,
;-:::
i:~::8
.~f~.
....
·~l;
,
;:::'
i.
,::{::"
".
;:r.~
!j
. ;':5:
•.;~~'
~.~:~
.j' :
.~
.~.
J'?;
.-;-:"'<:
~:
~
I:
•
~;::;:~"
.~
o
-~
Table 7
Incremental Costs Per Square Foot of Air Infiltration Barrier
By Types of Increments
;';;:-'
Group
No.
1
2
3
4
5
6
7
8
9
10
n
12
13
Current
Practice
Type
Type
Type
Type
Type
Type
Type
Type
Type
Type
Type
Type
Type
12,12,12
15, 1,15
15,12,15
15,12,15
15,12,15
15,12,15
15,15,15
15,15,15
15,15,15
15,15,15
15,15,15
15,15,15
15,15,15
Standard
Deviation
(S/ft2)
MCS
Mean
(S/ft2)
Type 2,2,2
Type 1,1,4
Type 11,11,11
Type 1,1,10
Type 1,1,7
Type 1,1,4
Type 1,6,4
Type 1,2,9
Type 1,2,7
Type 1,2,4
Type 1,1,9
Type 1,1,7
Type 1,1,4
0.08
0;16
lW5
0.03
:0.59
0.10
0.21
0.14
0.18
020
·0;18
·0.15
0.17
0.06
.0.13
0.09
0.05
0.10
0.09
9.07
0.13
0.21
0.17
All Other cases of increments
0.05
n.05
0.05
.two
1.47
Median Min.-Max. Sample
($/ft2)
($/ft2)
Size
0.10
0.19
0.02
0.03
0.08
0.09
0.16
0.12
0.18
0.18
0.19
0.14
0.12
0.17
0.02-0.15
0.09-'0:19
n.m·:(U3
0.0341:03
04.23
0.04-0.22
0.08.o()A5
5
7
5
5
:8
:9
:8
7
0~06.o().33
0.12.o().2S
0.09.:0.47
0.05'1).37
0.07'1)28
:6
28
:11
0.02~0.62
:21
t25
0-1.27
98
IDfUIraIion BarrIer Type Cod.
1 Polyvinyl under sheetrock.
2 Foam.
4 Exterior plyWood.
6 Polyvinyl between strapped wall.
7
9
10
11
Polyvinyl under slab floor!
;14 and #7.
Polyvinyl under subfIoor.
AIrtight drywall
12 Cnft or foiI·faced Insulation.
15 None.
:I:·.~·
:~
.. 1tt
~
'!j
. <
"co
,
'.
c•.
":
J:
~.~:"
~.:~.
;~~
".-':'
"".1
.-c:i:,;'
("-'"
·-!-,~t
. ,:.:."
·~r·
-::
.
"t ..
,-.;
"-,
:'.~'.
"
.J:
:.~~/
,
~
."
".
....
Table 8
Incremental Costs Per Square Foot of Air-ta-Air Heat Exchangers
By Types of Increments
Group
No.
Current
Practice
2
1
2
3
4
5
6
7
8
9
5
8
15
16
2
5
8
15
10
16
2
11
12
5
13
8
14
15
15
16
All Other cases of
MCS
<1500 ft2
<1500 ft2
<1500 ft2
<1500 ft2
<1500 ft2
1500-2500 ft2
1500-2500 ft2
1500-2500 ft2
1500-2500 ft2
1500-2500 ft2
>2500 ft2
>2500 ft2
>2500 ft2
>2500 ft2
>2500 ft2
increments
AAHX Type Code
2 Airxchange (NuTone).
5 Conservation Energy Systems (VanEE).
8 DesChamps (200 Series).
----\
15
16
Mean
Standard
Deviation
($/ft2)
($/ft2)
0.76
0.94
1.44
0.93
1.07
0.53
0.80
0.65
0.73
0.71
0.28
0.51
0.42
0.53
0.50
0.78
0.17
0.18
0.11
0.20
0.25
0.15
0.16
0.17
0.20
0.21
0.08
0.10
0.08
0.09
0.10
0.27
Q
~
r
()
Median Min.-Max. Sample
($/ft2)
($/ft2)
Size
0.70
0.88
1.48
0.95
1.02
0.53
0.83
0.66
0.69
0.72
0.30
0.50
0.40
0.52
0.50
0.75
0.52-1.14
0.78-1.24
1.28-1.52
0.56-1.16
0.82-1.42
0.24-0.76
0.41-0.97
0.22-0.94
0.55-1.48
0.35-1.15
0.17-0.35
0.38-0.64
0.35-0.55
0.45-0.64
0.38-0.69
0.29-2.08
...:
23
6
4
11
4
24
17
19
23
22
4
8
8
4
9
95
Star Heat Exchanger 100A.
Star Heat Exchanger 200A.
~
~.
Section VI
(
:"
1
Procedures for Calculating
Energy Budget with a Heat Pump
"
Step 1
Determine the heating seasonal performance factor
(HSPF) from the supplier, contractor, or manufacturer
of the heat pump. The Air Conditioning Refrigeration
Institute (ARI) has a directory listing HSPF's for most
heat pumps.
Tip: Try to find the most efficient model.
Step 2
Heat Pump Energy Budget =
Energy Budget
HSPF (.75)
3.413
Step 3
Indicate the heat pump energy budget and the HSPF
of that heat pump on the WATfSUN printout.
Step 4
If the heat pump energy budgeUs less than or equal
to the Super Good Cents energy budget specifications, the home meets Super Good Cents specifications.
Tip: Remember Super Good Cents specifications call for all ductwork in unheated space to be insulated to R-ll (3-1/2" of fiberglass batt).
Section VII
c
1
Bibliography
These resources were instrumental ill the development of
WATTSUN Version 3.1.
"A Simplified Method for Determining Below-Grade Heat Loss."
DannyS. Parker. Northwest Power PlanningCounciJ. Helena,
MT.1985.
Conversations with Jeff Harris of Bonneville Power Administration. June through November 1985.
.
. ,-
Handbook of Fundamentals. American Society of Heating Refrigeration and Air Conditioning. 1985.
The Model C()nservation Standard Energy Budget Approach
Handbppk. Washillgton State Energy Office, Ecotope, and
Bonneville Power Administr<ltion. January 1984.
Wal/-Sun. Volume 1 User Manual. Washington State Energy Office. March 1984.
""
C
,
, 'I,
:. ,:, -,,;.;'
'
; ::"
SecUon
vm
Summary of Commands
(
WATTSUN 3.1 Commands for Data Entry
(
(ESq
Takes you back to previous screen.
(+-' )
Carriage Return.
(E)
To edit data (help mode only).
(T)
To input type of construction.
(A)
To input area of component. .
(q
To input cost of component.
(HOME)
Switches between "current" and "proposed."
(PC UP)
Page up to check first 10 options in Component
Menu.
(PC ON)
Page down to check second 10 options in
Component Menu.
(t)
Scrolls up to previous component type.
(,I.)
SeroUs down to next component type.
(0)
Deletes type, area, and cost.
(~)
Backspace key.
(\f)
Shift key.
(CAPS
LOCI<)
Cap lock key.
1
Section IX
For convenient duplication, the Building
Component Worksheet and the Input Worksheet
are located in the back pocket
of this binder•
. ;..
.
•• ,
•• "
,.; • • •
.'
,,.,
"' .
,.-,, ", ,", " ..,..,..
-. '
;
"~'
,':
••
' :. ,
-, "
"
.. ',.
' J
.. ,'
•••• ' ., .
"
..,.,. ",
'."
(
";
.-
;.
,.
(
WATTSUN 3.1
BUILDING COMPONENT WORKSHEET
HOUSE to ..
MENU
NO.
1
2
BUILDING
COMPONENT
Below
Grade
Basement
Slab On
Grade
BUILDING
STANOARD
COMPONENT
DESCRIPTION
AR£A/LF
COST
TOTAl
tlCREMENTAl
COSH/UNIT
Current
Proposed
Current
Proposed
3
Crawl
Space
Current
Proposed
4
Above
Grade
Walls
Current
Proposed
Current
Proposed
Current
Proposed
TOTAL
Current
5
AREA
S
SE
E
HE
N
HW
W
Windows
Proposed
6
Exterior
Doors
Current
Proposed
7
Skylights
Current
Proposed
8
Ceiling
Current
Proposed
I
Current
!,
Proposed
9
Infiltration
Current
Proposed
0
Thermal
Mass
Current
Proposed
NOTES
SE~
1089
i
I
I
I
I
I
i,
:
I
I
I
WATTS UN 3.1
INPUT WORKSHEET
HOUSE I D..
MAIN
MENU
1)
NO.
2)
3)
4)
1
5)
6)
House Identification:
Address (site):
Builder's Name:
Homeowner's Name:
Utility'. Name:
Analyst's Name:
2
See Building Component Worksheet
3
Heated Floor Area (including basement and upstairs):
4
Location (choose location from table in Section II):
5
See Building Component Worksheet (window solar orientation)
6
Economics
1) Base House Cost:
2) Other Costs:
3) Builder Mark-up:
4) Interest Rate:
5) Mortgage Term:
6) Down Payment:
7) Income Tax Bracket:
B) Real Estate Tax:
9) Insurance:
10) Cost Per kWh:
Ft'
Current
Proposed
$
$
$
$
%
%
%
%
Vrs.
%
%
%
%
Vrs.
%
%
%
%
$
$
Proposed
Current
7
1) Heating Systems (describe):
2) Cost:
$
$
3) Ductwork In
Unheated SpaceInsulation R-values:
Btu/hr F' (Table B):
4) Indoor Thermostat
Setpoint:
F"
F"
5) Outside Winter
Design Temperature:
F"
F"
TABLE B
Duct Heat Loss Calculation
TABLE A
DUCT
SIZE
DUCT FT1
PER LF
INSULATION A-VALUE
R-2
R-4
R-7
R-ll
DUCT
RUN
1
2
3
LINEAL
TABLE A
VALUE
FEET
x
x
x
SUM LINES 1, 2, 3TOTAL DUCT LOSS:
~
HEAT LOSS
BTU/HR F"
~
~
~
~
Refer to "Duct Heat Loss", Section IV, for
instuctions in the use of Tables A and 8.
SE~
10tl9