15
RETURN AIR
DIRECT CONNECTION of both the HRV/ERV SUPPLY AIR STREAM and
EXHAUST AIR STREAM to the FURNACE COLD AIR RETURN
40" (1m) MINIMUM
Outdoors
Cool Air
Return
Installation Notes
•
Unit is normally balanced on HIGH speed with the furnace blower ON.
•
A minimum separation of 40 inches (1m) is recommended between the
two direct connections.
•
The exhaust air connection should be upstream of the supply air
connection to prevent exhausting any fresh air.
•
Weatherhood arrangement is for drawing purposes only. Six feet (2m)
minimum separation is recommended. The Weatherhood must also be 18"
(460mm) above grade minimum.
•
The airflow must be confirmed on site using the balancing procedures found in this manual
3' min.
recommended
Forced Air
Furnace
Dampers for
balancing
airflows
Simplified Installation Diagrams
Simplified Installation
(Return/Return Method)
Key Points
• The HRV/ERV must be balanced.
• It is mandatory that the furnace blower run
continuously or HRV/ERV operation be
interlocked with the furnace blower.
• The duct configuration may change
depending on the HRV/ERV model. See
specifications for your unit.
• Check local codes / authority having
jurisdiction for acceptance.
Sizing the Ductwork
It is the responsibility of the installer to ensure
all ductwork is sized and installed as designed
to ensure the system will perform as intended.
The amount of air (cfm) that an HRV/ERV will
deliver is directly related to the total external
static pressure (E.S.P.) of the system. Static
pressure is a measure of resistance imposed on
the blower by length of duct work plus the
number of fittings used in the duct work.
Summary of Contents for Heat Recovery Ventilator HRV 120SRD
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