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3. INSTALLATION
3.5 I
D
NSTALLING THE
UCTWORK AND THE REGISTERS
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.
The ductwork is intended to be installed in compliance with all local and national codes that are applicable.
3.5.1 F
D
S
ULLY
UCTED
YSTEM
S
TALE AIR EXHAUST DUCTWORK
• Install registers in areas where contaminants are produced: kitchen, bathrooms, laundry room, etc.
• Install registers on an interior wall, 6 to 12 inches (152 to 305 mm) away from the ceiling OR in the ceiling.
• Install the kitchen register at least 4 feet (1.2 m) away 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.
F
RESH AIR DISTRIBUTION DUCTWORK
• Install registers in bedrooms, dining room, living room and basement.
• Install registers either in the ceiling or high on the walls with air flow directed towards the ceiling.
(The cooler air will then cross the upper part of the room, and mix with room air before descending to occupant level.)
• If a register must be floor installed, direct the air flow up the wall.
3.5.2 E
D
S
XHAUST
UCTED
YSTEM
S
TALE AIR EXHAUST DUCTWORK
Same as for Fully Ducted System, described on point 3.5.1 above)
F
RESH AIR DISTRIBUTION
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.
When performing duct connection to the furnace supply duct, use a metal duct appropriately sized to support
the additional airflow produced by the HRV. It is recommended that the HRV is running when the furnace is in
operation in order to prevent backdrafting inside HRV.
There are two methods for connecting the unit to the furnace:
M
1: S
ETHOD
UPPLY SIDE CONNECTION
• Cut an opening into the furnace supply duct at least 18 inches (0.5 m)
away from the furnace.
• Connect this opening to the fresh air distribution port of the HRV
(use metal duct, see illustration at right).
• Make sure that the HRV duct forms an elbow inside the furnace ductwork.
• If desired, interlock (synchronize) the furnace blower operation with
the HRV. (See Section 5).
M
2: R
ETHOD
ETURN SIDE CONNECTION
• Cut an opening into the furnace return duct not less than 10 feet (3.1 m)
away from the furnace (A+B).
• Connect this opening to the fresh air distribution port of the HRV
(see illustration at right).
NOTE: For Method 2, It is recommended, but not essential that the furnace blower
runs when the unit is in operation. If desired, synchronize the furnace blower
operation with the HRV. (See Section 5).
(
S
AS ILLUSTRATED IN
ECTION
:
:
(
S
AS ILLUSTRATED IN
ECTION
:
:
!
WARNING
CAUTION
2.1)
2.2)
!
WARNING
CAUTION
9
M
ETAL DUCT
VJ0084
A
A+B=
NOT LESS
VJ0085
10' (3.1
THAN
M
INIMUM
18'' (0.5
)
M
B
)
M
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