Honeywell Whole House Dehumidifier
Owner’s Manual
Fresh Air Ventilation with:
W8150 Fresh Air Ventilation Controller
The DH90 comes with the Honeywell W8150 fresh
air ventilation control. The W8150 along with the
optional Y8150 damper automatically controls the
ventilation based on the size of your home, number
of bedrooms and airflow of your HVAC system
based upon ASHRAE 62.2 Standard. Please see
the installation guide or talk to your installing
contractor on how to set your W8150.
Optional Y8150 Damper
The Y8150 damper provides optimal ventilation
control when wired with the W8150 fresh air
controller. Contact your installing contractor
to purchase and install the damper if your
Honeywell Whole House Dehumidifier was not
installed with one.
Maintenance
The DH90 is equipped with a MERV 11 media filter. This filter should
be checked every three months. Operating the unit with a dirty filter
will reduce dehumidifier capacity and efficiency and may cause the
compressor to cycle off and on unnecessarily on the defrost control.
A MERV rating of 11 means the filter is 85% to 95% minimum efficient at
capturing a broad range of particles. For greatest filtration and efficiency
of the DH90, it is recommended the air filter be replaced every three
months with a MERV 11 rated filter.
Check drain outlet and hose once a year to clear drain of any debris.
CAUTION: EqUIpMENT dAMAgE hAzArd:
DO NOT operate the unit without the standard filter or with a less
effective filter than the standard MERV 11 filter. The heat exchange
coils inside the unit could become clogged and require disassembly
to clean.
