Make sure your bathroom fan operations meet ASHRAE 62.2 ventilation standards with the Digital Bath Fan Control. The control replaces a normal bathroom switch to provide simple programming. This allows you to manually turn the exhaust fan off and on or to program it to run at certain times of the day for increased energy efficiency and convenience. The programmable fan timer will run in timer mode up to 60 minutes in 5-minute increments. It also comes with an easy-to-see backlit display that shows the current time to keep you on schedule while getting ready for the day.