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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
(GOOD)
(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.
on page 16.
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.
Due to the difference in pressure between the HRV and the equipment it is being
connected to the HRV's airflow must be balanced on site, using the procedure found in
the section "AIRFLOW BALANCING"
* In the case of a multi-zone system, please contact Fantech customer
service prior to installing any installation type requiring the use of the
furnace interlock"
HRV/Furnace ducting for Simplified Installation - Option 1
* Ductwork layout may dif-
fer depending on model
Outside
Fresh air from
outside
Stale air to
outside
* Unit air flow should be balanced while HRV is on "Normal" speed and
furnace blower is running.
See furnace electrical connection
Air return
Air from inside
Fresh air to
living areas
Suggested installation for:
• When bathroom and kitchen
already have local exhaust
system
• May be suitable for
retrofitting
Benefits: Least expensive
installation type
1 m (3' 3")
min.
recommended
1 m (3' 3")
min.
recommended
Cold air
return
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