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REHABILITATE CAUDELL HALL
BUILDING 18
STATE UNIVERSITY OF NEW YORK
BUFFALO STATE COLLEGE
SUCF PROJECT NO. 03421
DIVISION 23 – HVAC
EXHIBIT "II" - DUCT INSULATION MATERIALS
MINIMUM INSULATION
THICKNESS
MINIMUM
REQUIRED
R VALUE
SERVICE &
LOCATION
INSULATION
MATERIAL
Air conditioning &
heating supply (within
building envelope)
Exposed:
Rigid fiberglass
1-1/2 in.
R-5
Concealed: Flexible
fiberglass
2 in.
R-5
Rigid board duct
insulation with
VentureClad
1577CW jacketing
system.
2-1/2 in.
R-8
Air conditioning &
heating supply
(exterior to building
envelope)
Air conditioning &
heating return
REMARKS
Not insulated
Air conditioning &
heating return (exterior
to building envelope)
Rigid board duct
insulation with
VentureClad
1577CW jacketing
system.
2-1/2 in.
Outside air ducts and
plenums, connections,
and mixing boxes
Rigid fiberglass
2 in.
Provide neat fit at
intake plenum
Exhaust, relief, or vent
ducts and plenums
Exposed:
Rigid fiberglass
1 in.
Concealed: Flexible
fiberglass
1-1/2 in.
Insulate 15 ft.
from exterior
opening and
plenums or 5 ft.
beyond damper,
whichever is
greater.
Kitchen hood exhaust
Dishwasher exhaust
INSULATION
R-8
Refer to
specification
section 230714 –
Fire Rated Duct
Insulation.
SEE NOTE 1
Exposed:
Rigid fiberglass
1 in.
Concealed: Flexible
fiberglass
1-1/2 in.
230700 - 7