21
DIRECT CONNECTION of BOTH the ERV SUPPLY AIR STREAM and
EXHAUST AIR STREAM to the FURNACE COLD AIR RETURN
Combustion
or Electric
Forced Air
Furnace
Balancing damper* in both air streams.
Outdoors
*Unit is normally balanced on HIGH speed
with furnace blower ON.
Cool Air
Return
NOTES:
1. Furnace blower is required to operate when ventilation from ERV is required.
The furnace should be set to run continuously.
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. Weatherhood arrangement is for drawing purposes only. 6' (2 m) minimum separation required.
18" (460 mm) above grade minimum.
5. Due to the differences in pressure between the HRV and the equipment it is being connected to,
the HRV's airflow must be confirmed on site, using the balancing procedure found in this manual.
Return Air
Return Air
40 inches minimum (1m) separation
3' min.
recommended
DIRECT CONNECTION of the SUPPLY AIR STREAM to the
FURNACE COLD AIR RETURN
Combustion
or Electric
Forced Air
Furnace
Balancing damper*
in both air streams.
Outdoors
*Unit is normally balanced on HIGH speed
with furnace blower ON.
EXHAUST AIR from various parts of home.
i.e. bathrooms (if required), kitchens (if required).
Cool Air
Return
NOTES:
1. Furnace blower may need to operate when ERV is on to provide good air distribution.
2. No separation requirements necessary between direct connection point and furnace.
3. Weatherhood arrangement is for drawing purposes only. 6' (2 m) minimum separation required.
18" (460 mm) above grade minimum.
4. Due to the differences in pressure between the HRV and the equipment it is being connected to,
the HRV's airflow must be confirmed on site, using the balancing procedure found in this manual.
Return Air
3' min.
recommended
Figure 8
Figure 9
Installation Diagrams
(Examples only)
