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For the Installer
5.4.4 S
I
IMPLIFIED
NSTALLATION
When performing duct connections to the furnace supply
duct, use metal ducts appropriately sized to support the
additional airflow produced by the unit.
Stale air from building ductwork:
•
Cut an opening into the furnace return duct at least 10 feet (3.1 m) (A + B) away
from the furnace.
•
Connect this opening to the stale air from building port of the HRV/ERV (as
illustrated).
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.
5.4.5 S
I
IMPLIFIED
NSTALLATION
Fresh air to building ductwork:
•
Cut an opening into the furnace return duct at least 10 feet (3 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).
Stale air from building ductwork:
•
Cut an opening into the furnace return at least 3 feet (1 m) ahead of the fresh air
to building ductwork connection to the furnace return.
•
Connect this opening to the stale air from building port of the HRV/ERV.
•
Make sure that both connections to the furnace return duct are at least 3 feet (1 m)
apart.
For this type of installation, the furnace must always be
synchronized with the unit. See section 8.
5.5 I
E
NSTALLING THE
XTERIOR
Refer to illustration at right to connect the insulated duct to the hoods. An "Anti-Gust
Intake Hood" should be installed in regions where a lot of snow is expected to fall.
Make sure that both hoods are at least 18 inches above the
ground and that the intake hood is at least 6 feet (1.8 m)
away from any of the following:
•
Exhaust hood
•
Dryer exhaust, high efficiency furnace vent, central
vacuum vent
•
Gas meter exhaust, gas barbecue-grill
•
Any exhaust from a combustion source
•
Garbage bin and any other source of contamination
- R
/S
ETURN
UPPLY
CAUTION
- R
/R
ETURN
ETURN
CAUTION
H
OODS
⚠
WARNING
VH0140
VH0141
E
XHAUST
H
OOD
18"
(457
MM
(1.8
C
AULKING
VD0028
9
18" (0.5
MINIMUM
A
A + B =
10' (3.1
A
A
T LEAST
3' (1
)
M
A + B =
6" ø
(152
)
MM
I
NTAKE
H
OOD
)
18"
6'
(457
)
MM
)
M
O
PTIONAL
T
APE AND DUCT TIE
DUCT LOCATION
)
M
B
AT LEAST
)
M
B
AT LEAST
10' (3.1
)
M
6'
(1.8
)
M
18"
(457
)
MM
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