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12. AIR FLOW BALANCING
READ THE APPLICATION WARNING AT THE FRONT OF THIS MANUAL.
Upon completion of the installation it is necessary that the Ventilation System be balanced.
This is necessary to ensure that the volume of air being exhausted from the dwelling is equal
to the volume of air being supplied. Balancing will also ensure that the HRV is operating at
it’s maximum efficiency.
Equipment Required:
• Magnahelic Gauge or Inclined Manometer with scale to 1” WC
• ¼” diameter rigid tube to provide 1 ¼” insertion
• Flexible ¼” tubing
Procedure:
Turn off all appliances and fans that may vent to the outdoors (i.e. vacuums, furnaces,
range hoods, clothes dryers, water heaters etc.).
All dwelling windows and doors are closed, close fireplace dampers.
Dwelling vapour barrier is complete and intact.
Ensure HRV drain connections are in place, drain trap is created in drain hose
and that the trap is filled with water.
HRV filters and energy recover cores are in place.
Turn on furnace circulating fan if HRV is connected to furnace ducting.
Ensure all duct connections are sealed.
Open HRV balancing dampers fully.
Power up HRV and set speed to high.
Allow system to stabilize, approximately 2 minutes.
Position magnahelic gauge close to HRV and set to zero.
With flexible line connected to magnahelic and rigid tube connected to flexible tube,
insert rigid tube into lower door port and record reading at magnahelic.
Remove tube and insert into upper door port and record reading.
Close balancing damper associated with the higher reading until that reading equals
the required value shown in Fig. 5 to provide the same CFM. Secure both dampers by
tightening the locking screws once the set points are established.
Recheck both pressures and record.
Install 1/4” white hole plugs provided into balancing ports in door.
While it is necessary to ensure that both air streams are balanced within 10%,
a near balanced condition should be possible.
Summary of Contents for Proventor II Series
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