Features:

  • Automatically detects excess humidity in a room and activates the ventilation fan to lessen condensation which helps reduce mold and mildew, Sensor uses microprocessor and digital sensing technology to continuously monitor and manage humidity levels in a room
  • Built-in timer sets the “minimum ON time” for the ventilation fan. The sensor time settings can be custom set to 10, 20, 30 or 45 minute intervals. The sensor will continue to operate the fan for the minimum time set or until there is a reduction in room humidity level
  • A sensitivity level adjustment allows users to adjust the sensor’s sensitivity to ambient air to prevent false cycling
  • Features an Air Cycle mode which automatically turns ON the ventilation fan for a set period of time and repeats the cycle hourly (eg. 20 minutes ON/40 minutes OFF each hour)
  • Replaces a single pole switch for control of ventilation fan or a fan/light combination, Fits in a standard wall box and requires a neutral for operation, The device’s built-in humidistat control meets CALGREEN requirements for Indoor Air Quality and Exhaust, Five-Year Limited warranty
  • Automatically detects excess humidity in a room and activates the ventilation fan to lessen condensation which helps reduce mold and mildew
  • Sensor uses microprocessor and digital sensing technology to continuously monitor and manage humidity levels in a room
  • Replaces a single pole switch for control of ventilation fan or a fan/light combination
  • 600W Incandescent, 150W LED/CFL, 400VA Magnetic Low Voltage/Flourescent, 1/6th HP (3-Amp) fan
  • Fits in a standard wall box and requires a neutral for operation
It’s not 100% perfect but I’d still recommend it

Easy install and works well. Was hesitant reading reviews but am happy with this switch. It’s not perfect as sometimes it doesn’t come on when it should and sometimes it does seem to come on randomly but the majority of the time it works great and I can’t imagine any similar switch is perfect. You can adjust moisture sensitivity and how long the fan will stay on once activated and one other parameter that I’ve never figured out the function of. I’d recommend it.

Works great

worked extremely well on default settings in my dry climate, installed a new panasonic fan that is so quiet we can hardly hear it running.. to keep it from sucking heat out unnecessarily in the winter automation was the ticket.. the old fan this was not a problem, it was so obnoxiously loud nobody would dare leave it running any longer than absolutely nessicary. Had to cut a half inch off the bottom of my door to let enough air in, that was the only tuning I did.. The fan turns on within a few mins of the shower being turned on.. just before the mirror starts to fog and then shuts off 10mins or so after I get out of the shower.. get out to a nice and dry bathroom, time to replace all the rusty door hardware and toilet hardware now that humidity is under control.

Works great for my application

Works great for my application. Reading some reviews had me a little nervous that it wouldn't function. I tested it by turning on a hot shower, and the fan kicked on after about 3-4 minutes. Installation was straightforward, if you can change a lightswitch or outlet, this is the same. If you can't; look it up, its really easy to do and it'll save you some money! (Make sure you flip the breaker!) One thing I thought was strange, the light (right above the fan icon on the switch) is solid green with the fan is OFF. When its on, the light goes off. To me this seems backwards, when the switch is on, the light seems like it should be on. This doesn't really bother me, but just something to point out. Make sure you read the setup instructions, you'll need to pry off the switch cover and make some adjustments that are unique to your application, such as shut off time and humidity setting for auto turn on. I stuck pretty close to defaults and it functions great for me. My bathroom is a 6 X 8 X 10 and as I mentioned earlier, the switch activated after 3-4 minutes of running a moderately warm shower.

Switch placement is critical.

Works great but some placement factors need consideration. If the switch is placed beside the door where dry air is drawn in or if it is in a box through which dry air enters the room when the door is closed, it will accurately sense that dry air rather than the room air and turn of prematurely or erratically (depending on whether door is opened or closed) as it will not be sensing room humidity but instead it will be sensing the humidity of the entering dry air. I have moved the switch to an interior location beside the toilet in a box sealed on the backside. This placement facilitates convenient user activation and accurate room humidity sensing.

It seemed like a great unit

We have a small toilet and shower room in our bathroom that I've been worried about collecting too much mildew since we bought our new place. We saw this switch/control when looking for other switches at one of those home improvement stores, but they were asking $25-30 for them. It seemed like a great unit, but it was hard to justify the cost. I saw it much cheaper here and picked it up. Installation was pretty easy, but I use to be an electrician. If not an electrician I highly recommend paying for one to do the work as it isn't exactly straight forward. It shouldn't cost too much to do this kind of job is just replacing an existing fan switch. Make sure to turn the power off before doing any work. Being electrocuted isn't fun. The controller works great in practice. I don't worry about too much mildew buildup in the tiny space since the fan will kick on/off if the humidity gets to a certain point.

Works well for my settings and bathroom

As a frustrated father who can't get my family to turn on the bathroom fan while showering, I love this product. After some experimentation, I set it to the "automatic" setting instead of a set humidity point. Auto works much better in Dallas, where the ambient humidity varies significantly. Also, as the product description mentions, it will not work if you don't close the bathroom door as the humidity will escape out the top of the open door and not get to the sensor. When the bathroom door is closed - the sensor turns on exactly when the mirror becomes steamed down to the level of the sensor on the wall. I'm using in a (50's house size) bathroom with 8 foot ceilings. I can see why it might not work well in some modern ridiculously sized bathrooms.

Works out of the box - No changes necessary.

NOTE: Must connect to white wire in box. Most switches do not require this. This will not work without it. 08 Feb 16 - Had it a day. Installed in about 40 minutes mainly due to not realizing that it requires constant power and thus requires the white wire be connected. There are 4 wires that will be connected to this. 1) The white wire (usually all of them are wired together) 2) The black hot wire (provides the actual power) 3) the ground 4) the black wire leading to your fan (could also be red). After I figured this out, it went in easily. I suggest not changing any of the settings that come default. It detects humidity very quickly and kicks the fan on. Once the threshold goes below the detection range, the fan will stay on an additional 10 minutes. Should be plenty to get the moisture out. I purchased this product because I have 4 kids and they may or may not remember to turn on the exhaust fan. I have several rentals and I had to replace a 2nd story bathroom ceiling that basically caved in due to years of moisture being trapped in the bathroom. It was a nightmare. I NEVER want that to happen again. $35 is cheap insurance to prevent this from happening again. I will install one of these there as well, but figured I would try it on my home first. When you use the restroom, you can push the button and the fan will stay on for 10 minutes. Should be more than enough to handle any bathroom odors.

Worked well in Northern NM

Was nervous after reading the negative reviews. We're using this in a Northern NM bathroom where there is very low ambient humidity. For us the switch has worked flawlessly without changing any of the default settings/sensitivities. As soon as the shower water warms up the switch kicks on and stays on until the humidity is normal. The only caveat is that the switch kicks off at the set timer interval regardless of humidity. The default was 15 minutes, so after 15 minutes the switch would shutoff, sample the high humidity and kick back on for another 15 minutes, etc. I set the timer to 30 minutes so this doesn't present an issue for us anymore.

Works great every day

The default settings are perfect. I did a guest bath remodel plan to include this sensor. Early on I set single gang box located deeper into the bathroom 56” AFF above the toilet for fan control. This sensor automatically controls the vent fan during showers to eliminate humidity . Also if doing business with the toilet needs exhaust you just tap the button just above the toilet and the fan runs for 10 min the shuts off. By locating the sensor at the recommended height and deeper into the bathroom, the unit detects the shower steam almost immediately . You need to check local codes but most say do not locate any switches or outlets with in reach of a shower or no closer than 36” or so. I don’t know if placing sensor, next to bathroom door, in existing wall box, would work as well or not. I anticipated using this sensor and located it as recommended , it works great! Love it!

Works perfectly for me, but only AFTER changing from the default as-shipped settings!

I bought 2 for 2 bathrooms. I had trouble at first, but only because I used the "as shipped" settings. Initially both did the same thing: When my house heat turned on, after a minute or 2 so did one or both fans connected to these switches. When I took showers, sometimes it would turn on, sometimes really late (with the mirrors all steamed up), and mostly not at all. I did seal the boxes with duct tape as I read it is good to do (I'm now unsure this is necessary). It was this way for a month. An email to Leviton which sadly took 3 or 4 days to be replied to, mentioned turning down the sensitivity or playing with the relative humidity setting. The sensitivity did nothing. However, turning the relative humidity up to around 65% (1 o'clock) setting now has both fans working perfectly. They *always* turn on sometime during my shower and never during the day at any other time or when the heat comes on. I do find I manually turn it off since it's cooled off too much before they go off automatically. This I don't mind at all. My mistake may have been assuming these ship with settings that are good for most applications only needing adjusting for some applications. My guess is most users need to make the change similar to what I had to.

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