Partially Dedicated System
Installation Notes
The ERV 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 ERV operation be interlocked with the
furnace blower. Refer to building code.
The duct configuration may change depending on the
ERV 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.
5
RETURN
AIR
DIRECT CONNECTION of the SUPPLY AIR STREAM to the FURNACE COLD AIR RETURN (Stale
air drawn from key areas of the home)
Stale Air to
Outside
Forced Air
Furnace
Fresh Air
from Outside
Dampers for balancing air flows,
if not in collars of unit
Exhaust Air from different
areas of the home
(bathrooms, kitchen)
Spring-Loaded Backdraft Damper (Recommended)
There is a location for an optional Backdraft Damper with the leaf hinge vertical. The damper is
installed on the “Stale Air to Outside Collar”
Install backdraft damper
to ERV collar with leaf
hinge vertical
Check local codes/authority having jurisdiction for acceptance.
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. 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 ERV during the operation of the furnace/air handler while the ERV is in standby, off, or recirculating.
Attention/Warning
