AprilAire Manual Analog Humidistat - 4655

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The AprilAire 4655 analog manual humidifier controller is a wall or duct mount low voltage on/off humidistat. An increase in relative humidity (RH) expands the nylon ribbon which opens the control switch to stop the operation of the humidifier. A decrease in RH reverses the process and closes the control switch. Need a part that you don't see on our site? Reach out to a sales representative today!