1. Home
Send to a Friend via Email

Humidistat

By

Humidifier Humidistat

The humidifier's "humidistat" controls humidity levels by controlling the humidifier's solenoid water valve which in turn controls water to the humidifier.

© www.Home-Cost.com 2006
Definition: The humidistat is a critical control device used in humidification systems for furnaces. It controls water flow to the humidifier and operates like a temperature thermostat, only for humidity. For example, when the humidity level hits a certain point the humidistat switch will open or close an electrical circuit that provides current to the solenoid water valve which subsequently opens or closes water flow to the humidifier. The solenoid is usually operated by a 24 volt circuit.

The humidistat may be a remote device mounted in the room where humidity is being monitored, or in the photo above, the humidistat is installed on the outside of the furnace’s return duct and its humidity measuring sensor is in the return air stream.

Also Known As: humidistat

Promotional Feature: View this video series to learn how to take good care of your house.

©2014 About.com. All rights reserved.