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TYPICAL INSTALLATIONS
NOTE: Installation may vary according to the model number and
the position; normal or reverse in which the unit is installed.
There are three common installation methods.
Fully Ducted System
(Primarily for homes with radiant hot water or electric baseboard
heating.) See Fig. 1.
Moist, stale air is exhausted from the high humidity areas in the
home, such as bathrooms, kitchen and laundry room.
Fresh air is supplied to bedrooms and principal living areas. If
required, bathroom fans and a range hood may be used to better
exhaust stale air.
Homes with more than one level require at least one exhaust
register at the highest level.
Fig. 1 - Fully Ducted System
Exhaust Ducted System (Source Point Ventilation)
(For homes with forced air heating.) See Fig. 2.
Moist, stale air is exhausted from the high humidity areas in the
home, such as bathrooms, kitchen and laundry room. Fresh air is
supplied to the cold air return or the supply duct of the furnace. If
required, bathroom fans and a range hood may be used to better
exhaust stale air.
Homes with more than one level require at least one exhaust
register at the highest level.
NOTE: For this type of installation, it is not essential that the
furnace blower runs when the unit is in operation, but we
recommend it.
Fig. 2 - Exhaust Ducted System
Simplified (Volume Ventilation)
(For homes with forced air heating.) See Fig. 3.
Fresh air and exhaust air flow through the furnace ducts, which
simplifies the installation.
The use of bathroom fans and a range hood is suggested to exhaust
stale air.
NOTE: For this type of installation, the furnace blower must be
running when the unit is in operation.
A12281
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Fig. 3 - Fully Ducted System
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