7
fantech
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)
1. Furnace blower must operate when ventilation from HRV is required.
The furnace should be set to run continuously or interlocked with
HRV.
2. A minimum separation of 1m (39") is recommended between the
two direct connections.
3. In order to prevent exhausting any fresh air, the HRV's exhaust air
connection should be upstream of the HRV's supply air connection
when ducting to the furnace's cold air return.
4. Weatherhood arrangement is for illustrative purposes only. 3m (10')
minimum separation and 460 mm (18") above grade is recommended.
5. Due to the differences in pressure between the HRV and the equip-
ment it is being connected to, the HRV’s airflow should be balanced
on site, using the procedure found in section "AIRFLOW
BALANCING".
Example diagram only - Duct configuration may change depending on model
Stale air coming from different areas of the
house (i.e. bathroom, kitchen).
* Unit air flow should be balanced while HRV is on "High" speed and fur-
nace blower is running.
Outside
Air return
1 m (3' 3")
min.
recommended
Cold air
return
* Ductwork layout may dif-
fer depending on model
HRV/Furnace ducting for Simplified Installation - Option 1
Suggested installation for:
•
When bathroom and kitchen
already have local exhaust
system
•
May be suitable for
retrofitting
Benefits:
Least expensive
installation type
In the case of a simplified
installation, Option 1 is
recommended.
