TOPGREENERCirculator Switch, Hourly Fresh Air Timer for Ceiling and Wall Ventilation Fan and Bathroom Fan, Countdown Time Delay, LED Indicator, 120VAC, 1/4HP Motor, 3A Max Fan Load, TDTS5-W, White

This is a really nice, easy to install/setup, auto timer fan switch. I really like this switch for the guest bathroom/kids bathroom. Once I finally got them to start turning the fan on consistently when showering... they'd just turn it on and leave it on all the time... This switch is a great option of you don't want a continuous run choice (which I didn't). It's decent quality and the timer setting is a small dial located behind the faceplate so easily accessible without being too easily changed or overridden.I've had it installed for a few weeks now and it's working exactly as I'd hoped.

I bought one, then two more!

My track record with timers like this has been very poor. Let’s just hope that this one proves it’s durability.

They are doing great job on my 2 bathrooms, one star taken because 2 or 4 hours are too long and can burn the heck out of the fans. Suggest they give more choices in minutes less than an hour!

Easy way to ventilate older homes using existing bathroom fan. I installed this wall switch in our on-suite bathroom fan. It now runs for 10 minutes every hour and draws fresh air from a slightly opened window. Our CO2 level has dropped considerably making sleeping much more comfortable. I would highly recommend this Topgreener Aircirculator switch TDTS5-W-F together with an indoor air quality CO2 monitor. If you are not comfortable with electrical wiring, hire it done. You must have hot neutral and ground in the switch box to facilitate proper installation.

I wanted to reduce the amount of mildew and mold growing in the bathroom so I started looking at ways to ensure the exhaust fan runs long enough to pull all the moisture from the air but not stay on all day.I looked at switches and fans with the humidity sensors but read and heard too many complaints about them not being very reliable. Considering how humidity levels in the house can vary quite a bit based on the time of year, I decided not to go this route.Instead, I decided to try a simple approach - use a timer. I spoke a couple contractors in my family about it and the consensus was running a fan for 30 minutes at the start of a shower is usually about right. This switch includes a 30 minute interval but provides a number of other times to accommodate other uses.The installation was no different than most other switches I've ever installed. You'll need a neutral for this switch to work. That wasn't an issue for me.I installed this in our master bath shower area and I've been thrilled with the results. Now my wife and I hit 30 minutes as we get into the shower and let the timer run through. So far I have no complaints at all. I plan on eventually installing two more of these in our other bathrooms.Update:The first timer is still working great a few years later. I have ordered and installed two additional timers for our other bathrooms. I found a new reason to use a timer for bathroom fans - kids! They often leave the fans on which seems like a big waste in winter and summer. No complaints and recommend.

Still working. Doesn't have any sort of nightlight, which is great because we didn't want one. The little blue indicator lights light up only to indicate when fan is on and duration set.

I bought the 4-pk since we have 4 bathroom fans in our new-to-us home. Our neutral wires (required for installation) were shoved all the way in the back of our light switch boxes, so we didn't think we had them at first. Once we found them and pulled them forward, installation was easy. I will say that in one location we had 4 toggle switches on the same wall plate. Once we replaced the old fan toggle switch for this "rectangular" style (and moved it to the end to fit the new cover plate which I also ordered off Amazon--one with 3 toggle switch openings plus 1 rectangular opening), getting all the wires shoved back in the box was a challenge. This product does take up more room.