Installation manual
11
5 Installation (cont’d)
5.4 INSTALLING THE DUCTWORK AND REGISTERS
WARNING
Never install a stale air exhaust register in a room where there is a combustion device, such as a
gas furnace, a gas water heater or a fireplace.
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5.4.1 Fully Ducted System (as illustrated in Section 4.1)
Stale air exhaust ductwork:
• Install registers in areas where contaminants are produced: bathrooms, laundry room, etc.
• Install registers 6 to 12 inches (152 to 305 mm) from the ceiling on an interior wall OR install
them in the ceiling (the duct leading to the register must never go through the attic).
• If a register is installed in the kitchen, it must have a washable filter and be located at least
4 feet (1.2 m) from the range.
• If possible, measure the velocity of the air flowing through the registers. If the velocity is higher
than 400 ft/min. (122 m/min), then the register type is too small. Replace with a larger one.
Fresh air distribution ductwork:
• Install registers in every bedrooms, in living room and a minimum of one per level without
bedroom nor living room.
• Install registers high on the walls with air flow directed towards the ceiling. The horizontal draft
must be perceptible at 3 ft. (910 mm) from register.
(The cooler air will then cross the upper part of the room and mix with room air before
descending to occupant level.)
5.4.2 System Combined with a Furnace (as illustrated in Section 4.2)
Stale air exhaust ductwork: (same as for Fully Ducted System, described on point 5.4.1)
Fresh air distribution:
• Cut an opening into the furnace return duct not less
than 10 feet (3.1 m) from the furnace (A+B).
• Connect this opening to one end of the top section of
a metal T coupling (the T will be reversed, see
shaded part in Figure 8).
• Connect the other end of the T coupling top section to
the fresh air distribution port of the HRV (see Figure 8).
NOTE: For this case, it is essential that the furnace
blower runs when the unit is in operation.
Synchronize the furnace blower operation with
the HRV operation (see Section 6.3).
WARNING
When performing duct connection to the furnace, installation must be done in accordance with all
applicable codes and standards. Please refer to your local building code.
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Figure 8
B
A
VJ0051
A+B = not less
than 10’ (3.1 m)