How to Set a Honeywell Relative Humidity Control

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Rotate the adjustment knob on the relative humidity control all the way to the left to turn it off.


If necessary, contact Honeywell customer support to obtain model-specific setting instructions.

A division of the Honeywell International conglomerate, Honeywell Sensing and Control has been producing climate control systems for residential customers for decades. Honeywell humidity controllers can be used to control Honeywell Humidistats and Dehumidistats included as part of your central heating or air conditioning system. Setting a Honeywell residential relative humidity controller can be done in seconds. For best results, set the relative humidity for your home based on the current outdoor temperature; this helps prevent condensation from forming on windows and other cold surfaces.

Step 1

Rotate the adjustment knob clockwise on your Honeywell relative humidity control to turn it on.

Step 2

Set the relative humidity control according to the current outdoor temperature. Turn the knob to the "15" position if it is minus 20 degrees Fahrenheit or colder; to the "20" position if it is between minus 10 and minus 20 F; to the "25" position if it is between 0 and minus 10 F; to the "30" position if it is between 0 and 10 F; to the "35" position if it is between 10 and 20 F; or to the "40" position if it is warmer than 20 F. Rotate the knob to the "50" or "60" positions if you desire increased humidity.

Step 3

Allow the system to operate for at least one full day before making any other adjustments.

Step 4

Make adjustments to the relative humidity control gradually, for best results. Rotate the adjustment knob, increasing or decreasing the relative humidity by 3 percent every 24 hours until the desired level of relative humidity is reached.

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Megan Mattingly-Arthur

Megan Mattingly-Arthur has been writing professionally since 1998. She has contributed to various publications, including "Teen Voices" and "Positive Teens" magazines, as well as a book, "The Young Writer's Guide to Getting Published." Mattingly-Arthur is studying travel and tourism through Penn Foster Career School.