Download ENERVEX Multiple Fireplace Specifications

Table of Contents
INTRODUCTION....................................................................................................................2
1. VENTING IN GENERAL.................................................................................................3
1.1 Designing Venting Systems.....................................................................................3
1.2 Gravity vs. Mechanical Venting................................................................................3
2. VENTING PROBLEMS AND POSSIBLE SOLUTIONS..................................................4
2.1 Chimney Performance Problems.............................................................................4
2.1.1 Problems associated with the venting system...............................................5
2.1.2 Problems associated with the heating appliance..........................................7
2.1.3 Problems associated with the building/house...............................................9
2.1.4 Problems associated with the building’s environment...................................11
3. VENTING STANDARDS AND CODES...........................................................................13
3.1 Solid-fuel Standards and Codes..............................................................................13
3.2 Gas Standards and Codes.......................................................................................15
4. VENTING SYSTEM DESIGN..........................................................................................19
4.1. Gravity Systems.......................................................................................................19
4.1.1 The chimney..................................................................................................19
4.1.2 The heating appliance...................................................................................20
4.2 Mechanical Venting Systems...................................................................................21
4.2.1 Location of a mechanical draft system..........................................................21
4.2.2 Installation at termination point......................................................................21
4.2.3 Installation on masonry chimneys.................................................................21
4.2.4 Chimney and flue sizing................................................................................21
5. MECHANICAL SYSTEM DESIGN..................................................................................22
5.1 Design Guidelines for Mechanical Venting of Gas and Manually Fired
Appliances................................................................................................................22
5.1.1 Fireplaces - wood or gas...............................................................................22
5.1.2 Stoves and fireplace inserts..........................................................................24
5.1.3 Other applications.........................................................................................24
6. GUIDE FOR MECHANICAL DRAFT SYSTEMS............................................................25
6.1 Mechanical Draft System for Wood-Fired Fireplace with a Single Flue...................25
6.2 Mechanical Draft System for Wood-Fired Fireplace with Multiple Flues..................26
6.3 Mechanical Draft System for Wood-Fired Fireplace with Safety System
per NFPA211/IMC-2000 edition................................................................................27
6.4 Mechanical Draft System for a Wood-fired Fireplace with Manual Damper and Safety
System per NFPA211/IMC-2000 edition...................................................................28
6.5 Mechanical Draft System for Gas-Fired Fireplace with a Single Flue
with Safety System per NFPA54/IFGC.....................................................................29
6.6 Mechanical Draft System (automated) for a Gas-Fired Fireplace with a Single Flue
with Safety System per NFPA54/IFGC.....................................................................30
6.7 Mechanical Draft System for Gas-Fired Fireplace with Multiple Flues with Safety
System per NFPA54/IFGC.......................................................................................31
6.8 Mechanical Draft System for Gas-Fired Fireplace with Multiple flues and Safety
System per NFPA54/IFGC......................................................................................
32
6.9 Mechanical Draft System for Gas-Fired Fireplace with Damper and Safety
System per NFPA54/IFGC......................................................................................
33
6.10 Mechanical Draft System (automated) for a Gas-Fired Fireplace with Modulating
Fan Speed and a Single Flue with Safety System per NFPA54/IFGC.....................
34
6.11 Mechanical Draft System for a Gas-Fired Fireplace with Modulating Fan Speed,
Damper and a Single Flue with Safety System per NFPA54/IFGC.......................... 35
6.12 Mechanical Draft System for a Gas-fired Fireplace with Modulating Fan Speed and
Multiple flues and Safety System per NFPA54/IFGC...............................................36
7. FREQUENTLY ASKED QUESTIONS.............................................................................37
APPENDIX A: DESIGN THEORY....................................................................................38
APPENDIX B: CONVERSION TABLE FROM RECTANGULAR TO ROUND FLUES..... 42
APPENDIX C: RESISTANCE FACTORS........................................................................42
SOURCES AND REFERENCES.....................................................................................43
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