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The Aprilaire
®
Dehumidifier is designed to control humidity inside the whole home. The dehumidifier uses a dew point calculation to control the
humidity based on the dryness set point on the dehumidifier control. An optional Model 70 Living Space Control or third-party control can be
used in place of the onboard control.
The dehumidifier has a built in feature to allow air cycling or ventilation. Air cycling allows activation of the HVAC fan to cycle air throughout the
home for airflow balance and comfort. Ventilation brings fresh air into the home and is designed to meet ASHRAE 62.2 Standard for Ventilation.
There are three main installation options, Whole-Home, Spot, and Convertible.
WHOLE-HOME, see page 6 SPOT, see page 8 CONVERTIBLE, see page 10
In a Whole-Home installation, the dehumidifier
works in conjunction with the HVAC system,
offering the optimum solution for year-round,
whole-home control. This installation is
typically in basement or attic locations. In
a typical setup, air is pulled from the return
duct, dehumidified, and returned to the
supply duct. Alternate duct configurations are
possible.
In a Spot installation, the dehumidifier is not
ducted to the HVAC system and is used to
dehumidify a specific area. This installation
is typically in basements or crawl spaces,
with the dehumidifier ducted to the area
requiring dehumidification. Grilles on the
inlet and outlet are added to increase the
pressure drop across the unit.
In a Convertible installation, the dehumidifier
controls humidity in both whole-home
and spot locations. The dehumidifier will
dehumidify the whole home as the first
priority, switching to the spot location after
the whole-home dehumidification need has
been met.
RETURN
DUCT
SUPPLY DUCT
DEHUMIDIFIER
HVAC / FURNACE
LIVING
SPACE
SUPPLY DUCT
RETURN DUCT
DEHUMIDIFIER
HVAC FURNACE
SUPPLY DUCT
RETURN
DUCT
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