This Model 4016 Humidistat is no longer available. Use Aprilaire Model 4655 as replacement.
Aprilaire Model 4016 manual humidistat designed for 24v & 120v humidifier control. Humidity is sensed using a nylon ribbon that expands with an increase in humidity.
Includes humidistat, as shown our photos.
SPST Dust-Proof Switch
Operating Differential 8% RH
Rating 24 vac 5.2 amps
Nylon Ribbon has Clear Inspection Window
Mounts on Wall Surface
For wiring to 24vac humidifier, use 2-conductor thermostat wire, not included. The RP-4016 is not designed for duct mounting.
Used in the Model 350 360.