2.Install insulated ducts to OA and EA adapter.
(Fig.13-1)
(1)Pull back the insulation to expose the flexible
duct.
(2)Attach the flexible duct to the adapter using
tie wrap. You can attach to the 4 inch or
6 inch according to size of flexible duct.
(3)Pull the insulation over the adapter.
(4)Apply UL181A certified pressure sensitive
tape or mastic to insulation duct and
adapter making an airtight seal.
3.Attach duct (rigid galvanized duct, etc) to the
SA and RA adapter using UL181A certified
pressure sensitive tape or mastic. You can
attach to the 4 inch or 6 inch according
to size of duct. (Fig.13-2)
Fig.13-2
Insulation
Insulation Mastic
Mastic
Mastic
Tie wrap
Tie wrap
DUCTWORK
12
OA and EA adapter
Attach to 4”
adapter
Attach to 4”
adapter
Attach to 6”
adapter
SA and RA adapter
Fig.13-1
(1)
(3)
(2)
or
or
Attach to 6”
adapter
(4)
4.Install outdoor hood and connect with
insulated ducts.
When install them, please refer to the local
codes for detail.
The intake side duct must be
connected to the outside and at least
6 ft (1.8 m) away from the exhaust of
appliances such as furnace, dryer, fuel
burning appliances, etc.
(1)If separate hoods are used, locate them at
least 10 ft (3 m) apart. (Fig.14)
CAUTION
10’ (3 m)
Exhaust hood
with backdraft
flap (s)
Fig.14
Note
Intake hood
with bird screen
(No backdraft
flap (s))
