Product Description

The Aprilaire 4655 Humidistat is designed for low voltage service to control humidification equipment. Can be wall mounted or mounted on return plenum. For duct mount, locate at least 6 inch upstream of humidifier, humidifier bypass ductwork or fresh air intake ductwork. Replaces several different humidistats including part 83321.

The manufacturer is sometimes referred to as April Aire, Aprilair, April Air but is correctly spelled Aprilaire.