Aprilaire 4655 Humidifier Control 328140-751 High Performance: Optimized for dampers

High Performance: Optimized for dampers up to 6

3-inch frame and an open air-over enclosure

and safety limit circuits

The kit includes a 3/8-inch female sweat inlet

Aprilaire 4655 Humidifier Control 328140-751 High Performance: Optimized for dampersThe 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