Aprilaire® Digital Humidifier Control, 24 VAC, 10 - 45% Relative Humidity Adjustable, 3% Differential Humidity, Duct Mounting, Beige, -10 to 40 deg F, 6 in W x 4-1/4 in H x 1 in Thick
- Digital readout on the control displays the RH level inside the cold air return
- Shows that the humidifier is operating
- Allows you to check relative humidity level
- New lighted display includes indoor relative humidity readout, service indicator light, water panel change light and "on" indicator light
- 3/4 in rounded hole size
- Terminal strip wire connection
- Includes outdoor temperature sensor, manual mode resistor