Dehumidifer Control
ON/OFF button
used to turn
dehumidifier on
and off
Up/Down
buttons used to
change humidity
setting
MODE button
used for optional
ventilation feature
Inlet Filter Access
Door
Drain Power
Switch
Outlet
PLEASE LEAVE THIS MANUAL WITH THE HOMEOWNER
WHOLE HOME DEHUMIDIFICATION
The Aprilaire
®
Dehumidifier controls the humidity level in your entire home. A powerful blower inside the dehumidifier draws air into the cabinet,
filters the air and removes moisture, then discharges the dry air into the HVAC system or dedicated area of the home. Inside the cabinet, a
sealed refrigeration system removes moisture by moving the air through a series of tubes and fins that are kept colder than the dew point of
the incoming air. The dew point is the temperature at which moisture in the air will condense, much like what occurs on the outside of a cold
glass on a hot summer day. The condensed moisture drips into the dehumidifier drain pan to a drain tube routed to the nearest floor drain or
condensate pump. After the moisture is removed, the air moves through a second coil where it is reheated before being sent back into the home.
The air leaving the dehumidifier will be warmer and drier than the air entering the dehumidifier.
You can reduce the amount of humidity that enters the home by closing windows, doors, and fireplace flues when outdoor humidity is high,
and by drying clothes outside. Direct exhaust from kitchen vents and bath fans is the best means of controlling humidity due to cooking and
showers/baths. The dehumidifier is not designed to prevent window condensation in winter. Use ventilation to lower indoor humidity levels
in the winter.
Model 1870 & 1870W Dehumidifier
Owner’s Manual
Installed by: _________________________________ Installer Phone: _______________________ Date Installed: _______________
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