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15
DIRECT CONNECTION of both the HRV SUPPLY AIR STREAM and
EXHAUST AIR STREAM to the AIR HANDLER COLD AIR RETURN
Defrost air port needs to be drawn from clean
area without combustion appliances. To avoid
backdrafting of combustion products, never
draw
defrost air from a room with a naturally
aspirated
appliance, i.e. furnace, hot water
heater, gas dryer, stove, fire place etc.
WARNING
Weather hood arrangement - requires a minimum
of 6' (2m) separation and a minimum of 18" (460mm)
clearance above grade or anticipated snow level.
CAUTION
● It is mandatory that the air handler blower
run continuously or HRV operation be
interlocked with the air handler blower.
● Check local codes/authority having
jurisdiction for acceptance.
Simplified Installation for HRV
(Return/Return Method)
NOTES:
1. Air handler blower must operate when ventilation from HRV is required.
The air handler should be set to run continuously or interlocked with HRV.
2. A minimum separation of 40 inches (1m) is required between the two direct connections.
3. The exhaust air connection should be upstream of the supply air connection to prevent
exhausting any fresh air.
4. Weather hood arrangement is for drawing purposes only. Six feet (2m) minimum separation required.
18" inches (460mm) above grade minimum or above anticipated snow level.
5. Due to the differences in pressure between the HRV and the equipment it is being
connected to, the HRV's air flow must be confirmed on site, using the balancing
procedure found in the installation manual.
HRV must be balanced.
WARNING
Fresh Air From Outside
Air
Handler
*Unit is normally balanced on
HIGH speed with air handler
blower ON.
Cool Air
Return
High efficiency filter
or electronic air cleaner
Outdoors
Exhaust Air to Outside
Return Air
3’
(915 mm)
min.
recommended
40" (1m) MINIMUM
Field-supplied Balancing Damper (optional)
Fresh Air to Building
Application Illustrations HRV–Option 2