8
For the Installer
5.4 INSTALLING THE DUCTWORK AND THE REGISTERS
5.4.1 FULLY DUCTED SYSTEM
Stale air from building 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 install them in the ceiling.
• Install the kitchen register at least 4 feet (1.2 m) away from the range.
Fresh air to building ductwork:
• Install registers in bedrooms, dining room, living room and basement.
• Install registers either in the ceiling or high on the walls with the airflow directed
towards the ceiling.
• If a register must be installed in the floor, direct the air flow up the wall.
5.4.2 EXHAUST DUCTED SYSTEM - SUPPLY SIDE
Stale air from building 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 install them in the ceiling.
• Install the kitchen register at least 4 feet (1.2 m) away from the range.
Fresh air to building ductwork:
• 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 to building port of the HRV/ERV (use metal
ducts, see illustration at right).
• Make sure that the HRV/ERV duct forms an elbow inside the furnace ductwork.
NOTE : For this type of installation, it is recommended, however, not essential, that the
furnace blower be synchronized with the unit.
5.4.3 EXHAUST DUCTED SYSTEM - RETURN SIDE
Stale air from building 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 install them in the ceiling.
• Install the kitchen register at least 4 feet (1.2 m) away from the range.
Fresh air to building ductwork:
• Cut an opening into the furnace return duct at least 10 feet (3.1 m) away from the
furnace (A+B).
• Connect this opening to the fresh air to building port of the HRV/ERV (see
illustration at right) using metal ducting.
NOTE : For this type of installation, it is recommended, however, not essential, that the
furnace blower be synchronized with the unit.
VH0099
VH0138
18” (0.5 M)
MINIMUM
CAUTION
When performing duct connections to the furnace supply
duct, use metal ducts appropriately sized to support the
additional airflow produced by the unit.
⚠WARNING
• Never install a stale air exhaust register in a closed room where a combustion device operates, such as a gas
furnace, a gas water heater or a fireplace.
• When performing duct connections, always use approved tools and materials. Respect all corresponding laws
and safety regulations. Please refer to your local building code.
VH0139
B
A
A + B = AT LEAST
10’ (3.1 M)
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