TOPGREENER Humidity Sensor Fan Switch for Ventilation with Wall Plate | Automatically turns fan on/off based on humidity levels. Neutral wire required. UL listed. White, 2 Pack

Installed this humidity sensing switch replacing a really old school fan timer in our laundry room that had an analog clock in it with metal tabs to set time intervals. Installation was simple and wired up exactly as the old timer. Tested it by blowing on it and it immediately turned the fan on when sensing humidity from my breath. The instructions that came with it for programming are totally incorrect and mention being able to set the time for how long it runs, which is not possible. After researching this I actually found the correct installation guide online which states the time is runs is always 20 minutes and is not adjustable. You can only adjust the humidity sensitivity to three preset settings and that's it. Programming: - The fan button will be used for programming - Pay close attention to the LED lights as it will flash to indicate successful programming steps and each time the button is pressed while making selections. - After each step, there are only 20 seconds to make the next programming selection. If a selection has not been made, time will expire and the LED light will flash 3 times and exit programming mode. There’s only one Programmable Function Function 1: Humidity level (Humidity Range 45% 65% 80%) - Setting 1: Low humidity sensitivity 45% (requires little humidity to trigger) - Setting 2 (Default): Medium humidity sensitivity 65% - Setting 3: High humidity sensitivity 80% (requires high humidity to trigger) To program the humidity sensor, you must first enter programming mode: STEP 1: Enter Programming Mode Press and hold the fan button for eight seconds until the LED indicator comes on. STEP 2: Choose the Setting Press the fan button the same number of times as the Setting Number (For example: Press the button 2 times to select Medium detection 65%). After the last button is pressed the sensor will flash back the current setting for that function 10 times at two-second intervals. If no selection has been made, the device will exit programming mode. STEP 3: Save the Settings Press and Hold the fan button for eight seconds. The LED light will flash 3 times. indicating that the settings are saved then the load will turn OFF. Example: Change to Setting 3 (High humidity) 1. Press and hold the fan button for eight seconds until the LED indicator comes on 2. Press the fan button three times. The LED indicator should now blink three times every two seconds 3. Press and Hold the fan button for eight seconds. The LED light will flash 3 times indicating that the settings are saved then the load will turn OFF

The house I bought has a skylight shaft in the bathroom. The bathroom fan didn’t keep up so in the winter it would start “raining” from the skylight shaft when the steam hit the cold walls of the shaft when anyone took a long shower. I had two Panasonic whisper fans installed: One that replaced the original fan/light by the shower, and one in the shaft. We had a sensor switch installed too that would control both fans. The problem was that the sensor was located at the bathroom entrance with the light switch, so it never really worked correctly. I replaced the whisper fan in the shaft with a vent connected to a 4” inline exhaust fan located as high up the shaft as I could get it and purchased this switch to mount in the shaft to control it. The switch is doing what I expected which is a good thing, because accessing it isn’t easy. Install was easy. Instructions were clear. You do need a neutral wire for any humidity sensor, so make sure you pull one and hook it up.

This is a good little device to help manage moisture in the shower, eliminating the need to replace the fan itself with a moisture sensing one, which are quite expensive and harder ti install. This device is easy to install by replacing the toggle switch on the wall (perfect fit) and, for me, the setting was appropriate right out of the box, turning on the fan when moisture is detected and going off automatically. Happy with the purchase.

Replaced an existing fan switch. Easy to install. Fits perfectly in the existing cover plate. Set to medium humidity setting. Fan comes on within a minute of turning the shower on, even if I don't switch it on manually. Automatically switches off when humidy drops. Illuminated switch is a nice touch.

TOPGREENER Humidity Sensor after placing in our 4 bedrooms. Versatility of just what we need us the Sensor is perfect with using the humidity used and turned off/on.

stopped detecting humidity after 1 week. return window closed

I ordered two of these for a remodel to clear out steam in a kids bathroom after they stand in there until the water run cold. Read the instructions and it works great. The key is to let it do its job or if you turn it on, dont turn it off. It will turn off automatically. Had an issue where one was running excessively and they sent me a new one without any issues. Very happy with product and customer support.

El swicth trabaja perfectamente y es fácil de programar, trabaja cuando la humedad es alta y no hay que preocuparse por apagarlo, es como dice el fabricante

Good product but would not work in my application

Working perfectly as expected. Comes on automatically when needed, turns off by itself when its done. Really like it.

Although the scary reviews. I decided to try my luck and ordered 2. came on time. very easy to assemble and configure and working fine. however sometimes yes turning on might be delayed but its OK. I don't expect 100% accuracy of few dollars sensor. the sensor light is very bright so its better to shut the bathroom door in case the switch is facing the door. Cheers !

Le programme est facile a faire. par contre, la detection d'humidité n'est jamais bonne. des fois ca démarre sans que l'humidité soit élevé. des fois le contraire. Humdité élevé mais il ne fonctionne pas. mode manuel 30 min. ca ne fonctionne pas non plus. il reste allument tout le temps

Had to rewire but finally installed unit and it is working as advertised. Set Humidity to High, again, took a few time to get it right, but in the end, all is working.