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Push and turn with slotted
screwdriver. Damper
automatically locks when
pressure is released.
When connecting ductwork
to the collar, take note where
screws are located. Screws
should be located no further
than 1/2” from outside edge
of collar, so as not to impede
operation of the damper.
1/2”
Hard/Rigid
ducting
Insulated flexible
ducting
Installations where the HRV is ducted directly to
the return of a furnace may require additional
dampening on the fresh air to building duct.
This is due to the high return static pressures
found in some furnace installations.
Balancing Collar Instructions