Exhaust Fan Timers Provide A Simple Way to Save Energy

After a long day, sometimes there is nothing better than a good shower, right? Afterwards, you turn on the exhaust fan to prevent moisture. An hour later, you’ve made something to eat, watched an episode or two of a TV show, and called your friend to chat about it. You hear a faint humming, but can’t quite place it. A ha! That bathroom fan is still on, both exhausting air and increasing energy bills. Instead of beating yourself up about it, install exhaust fan timers to eliminate this problem while also reducing energy use.

Enough is enough, and too much is a waste

So, exactly how much is enough? Following a shower or bath, the exhaust fan should be left on no longer than 20 minutes. In this time, the fan is able to exhaust out moisture to prevent mold and the build-up of condensation. Keeping the fan on for less than this can result in the condensation problems that exasperate respiratory-related health issues such as asthma.

Understandably, it can be difficult to remember to turn the exhaust fan off, or remember how long it has been on. When the exhaust fan is left on longer than 20 minutes, it causes a waste of energy. Setting an exhaust fan timer allows you to maintain healthy air quality in the bathroom and reduce energy waste at the same time.

Choosing the right timer

Exhaust fan timers come in both mechanical and digital models. A mechanical timer operates the same way in which a classic oven-timer works, with the wind-up mechanism. These typically cost less than the digital timers, and can be set by the minute. Digital timers allow you to choose the operation settings with the push of a button. This type of exhaust fan timer does not allow for minute operation, but can only be set based on five or ten minute intervals.

Two-position timers have “on” and “timed fan” options. On activates both the light and fan, while the timed fan setting shuts the light off and operates the exhaust fan. Three-position timers have both of these functions as well as an “off” function. Setting the timer to the off position shuts off both the exhaust fan and the bathroom light.

Time for installation

Installing a timer for the exhaust fan is not a task that can solely be done by an electrician. These timers are installed by simply connecting the exhaust fan and the light in the bathroom to the switch. Once the connection has been made, the timer is ready for use.


Saving energy at home is actually much simpler than it may at times appear. The use of exhaust fan timers is a great example of this. By simply setting the timer, you are promoting healthy indoor air quality at home, reducing energy use and costs, and eliminating that horrible feeling of forgetfulness all at the same time.

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