24
INSTALLATION EXAMPLES
(CONT'D)
DIRECT CONNECTION of both the ERV SUPPLY AIR STREAM and
EXHAUST AIR STREAM to the FURNACE COLD AIR RETURN
Simplified Installation
Option 1
(Return/Return Method)
• ERV must be balanced
• ERV must 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 is required to operate when ventilation from ERV is required. ERV should beinterlocked with fur-
nace blower (SEE CAUTION ABOVE)
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 ERV and the equipment it is being connected to, the 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
CAUTION
In humid climates, it may be "preferable" to have a dedi-
cated ducting system to the house for the ERV instead of
connecting the ERV to the central air-conditioner. Since
the central air-conditioner fan must be running continu-
ously to allow the fresh air from the ERV to be properly
distributed throughout the house, it may pick up humidity
from the cooling coil when it is not operating and re-dis-
tribute it to the house, causing excess humidity. This sit-
uation may be particularly aggravated if the air-condition-
er is over-sized.
