Digital Humidistat Controller for Aprilaire 4655

Anticipating a drop in outdoor temperature and reducing the humidity setting are crucial to avoiding excess condensation. The indoor relative humidity often exceeds the level that the home can support for the current outdoor temperature, leading to this excess condensation. To adjust the humidity setting, simply rotate the control knob to the desired setting. Provided that the HVAC system fan is operating and the humidification level is lower than the new set point, the manual humidistat will activate the humidifier.

The manual digital control humidistat is designed for use with low-voltage service, offering control over your humidification equipment. It is compatible with the Aprilaire humidifier 4655 500. The humidistat is intended to be installed on the cold air return duct or on an interior wall in the living area of the home.

To determine the relative humidity in the home, slowly turn the knob on the control clockwise and counterclockwise, listening for 2 clicks. The actual relative humidity in the home is the value between these 2 clicks.

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