Partially Dedicated System
Installation Notes
The HRV must be balanced.
Unit should be balanced on high speed with the furnace
blower on.
It is recommended that the furnace blower run
continuously or HRV operation be interlocked with the
furnace blower. Refer to building code.
The duct configuration may change depending on the
HRV model.
A backdraft damper is recommended in the exhaust air
duct to prevent outdoor air from entering the unit.
The airflow must be confirmed on site using the
balancing procedures found in this guide.
Spring-Loaded Backdraft Damper (Recommended)
Install the Backdraft Damper with the leaf hinge vertical. The damper is installed on the “Stale Air
to Outside Collar”
5
Forced Air
Furnace
Cool Air
Return
Dampers for
balancing
airflows
Outdoors
RETURN AIR
EXHAUST AIR
from various parts of
home. i.e. bathrooms (if required),
kitchens (if required)
3 ft min.
recommended
Backdraft Damper
Leaf Hinge
Installed Vertically
(Recommended)
Applications such as greenhouses, atriums, swimming pools, saunas, etc. have unique ventilation requirements
which should be addressed with an isolated ventilation system.
Weatherhood arrangement is for drawing purposes only. 6 ft (2 m) minimum separation is recommended with 18
in (460 mm) above ground.
Check local codes/authority having jurisdiction for acceptance.
Backdraft dampers are recommended for the stale air to outside air duct. 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 recirculating.
Attention/Warning
