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18
INSTALLATION EXAMPLES (CONT'D)
DIRECT CONNECTION of both the HRV SUPPLY AIR STREAM and
EXHAUST AIR STREAM to the FURNACE COLD AIR RETURN
Simplified Installation
Option 1
(Return/Return Method)
• HRV must be balanced
•
It is mandatory that the furnace blower
run continuously or HRV operation
be interlocked with the furnace blower
• Check local codes/authority having
jurisdiction for acceptance
Note: Option 1 is the pre-
ferred/recommended method
when doing a simplified
installation
NOTES:
1. Furnace blower may be required to operate when ventilation from HRV/ERV is required. The furnace should be
set to run continuously or interlocked with HRV/ERV.
2. A minimum separation of 39 inches (1m) is recommended 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. Weatherhood arrangement is for drawing purposes only. 6’ (2m) minimum separation recommended. 18” (460
mm) above grade minimum.
5. Due to the differences in pressure between the HRV/ERV and the equipment it is being connected to, the
HR/ERV’s airflow must be confirmed on site, using the balancing procedure found in the installation manual.
* Unit is
normally
balanced
on HIGH
speed
with
furnace
blower
ON.
Return Air
1 m
(3’-3”) min.
recommended
Cool Air
Return
Outdoors
40”
Min.
* Ducts connection may
vary depending on model
Example diagram only-duct configuration may change depending on model