Integrated Heater: Prevents internal moisture buildup

protecting sensitive control board circuits and motors from voltage drops

consult the chemical resistance guide to verify elastomer compatibility

Built to handle a 120V primary input and 24V secondary output at 40VA

With a versatile operating range of 0

Aprilaire 4655 Humidifier Control 322838-752 Integrated Heater: Prevents internal moistureThe Aprilaire 4655 Humidifier Control is a reliable, manual humidistat designed to provide precise low voltage 24V management for your central heating and cooling system. This essential HVAC humidity sensor utilizes a highly sensitive mechanical nylon ribbon filament that expands and contracts based on moisture levels, ensuring your whole house humidifier operates only when necessary. By manually adjusting the relative humidity (RH) setpointtypically