Specifications

Aprilaire Optional Controls
• High Limit Switch
-Highly recommended optional device
-Supply duct mounted
-Mounted at a minimum of 3’ (1m) downstream of the
steam distribution tube
-Ensures that high humidity levels do not exist in the
supply duct of the HVAC system
-Shuts down the humidifier in the event of out of range
conditions (Typically 80-90%)