push-button, w/20 min boost, meets ASHRAE 62.2 Standard

The VT20M intermittent Fan Control is designed to meet whole-house ventilation needs outlined in ASHRAE 62.2 Standard.

The controller enables the exhaust fan to run at a pre-set speed for a pre-set portion of each hour, 24 hours a day. The high-speed override button enables the fan to run at full speed for 20 minutes when needed. For example, to vent steam from a bathroom.