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DIRECT CONNECTION of the SUPPLY AIR STREAM to the FURNACE COLD AIR RETURN
EXHAUST AIR from various parts of home.
i.e. bathrooms (if required), kitchens (if required).
Outdoors
Spring-Loaded Backdraft Damper
Install the Backdraft Damper with the leaf hinge vertical.
The damper is installed on the "Stale Air to Outside Collar".
4" (102mm) Backdraft Damper Part No. 99-RSK4
5" (127mm) Backdraft Damper Part No. 99-RSK5
6" (152mm) Backdraft Damper Part No. 99-RSK6
8" (203mm) Backdraft Damper Part No. 99-RSK8
Installation Notes
• Unit is normally balanced on HIGH speed with the furnace blower ON.
• Weatherhood arrangement is for drawing purposes only. Six feet (2m)
minimum separation is recommended. The Weatherhood must also be 18"
(460mm) above grade minimum.
• The airflow must be confirmed on site using the balancing procedures
found in this manual.
(Stale air drawn from key areas of home)
Backdraft
Damper
leaf hinge
Return Air
3' min.
Dampers for
recommended
balancing
airflows
Cool Air
Return
WARNING
The Stale Air to Outside air duct requires
a Backdraft Damper. This damper prevents
outdoor air from entering the HRV during
the operation of the Furnace/Air Handler
while the HRV is in standby, OFF or
Recirculate.
Forced Air
Furnace
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