Indoor Air Systems Air Conditioner User Manual
23
Simplified Installation
Option 2
(Supply/Return Method)
RETURN AIR
DIRECT CONNECTION of both the HRV/ERV SUPPLY AIR STREAM and
EXHAUST AIR STREAM to the FURNACE COLD AIR RETURN & SUPPLY AIR SIDE
Outdoors
Cool Air
Return
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. The exhaust air connection should be upstream of the supply air connection to prevent
exhausting any fresh air.
3. Weatherhood arrangement is for drawing purposes only. Six feet (2 m) minimum separation required.
Eighteen inches (460 mm) above grade minimum.
4. Due to the differences in pressure between the HRV/ERV and the equipment it is being
connected to, the HRV/ERV's airflow must be confirmed on site, using the balancing
procedure found in the installation manual.
3’ min.
recommended
3’ min.
recommended
It may be necessary to
form an elbow in the supply
side ducting as shown
Forced Air
Furnace
Example diagram only - duct configuration may
change depending on model