Decora In-Wall Humidity Sensor and Fan Control Switch, 1/4 HP, Residential Grade, Single Pole, White, DHS05-1LW

Easy to install, works great! I tested the various settings and adjusted the switch to turn on automatically at 35% humidity which works great. You can set it 50%, 65% and even higher if desired. The unit is a standard size switch, so I had no issues reinstalling the original dual wall face plate. It looks really nice and made the bathroom look nicer with it installed. I like that you can also still manually turn it off/on as desired and that it auto shuts off after 10 minutes in case you forget to turn it off. Super easy to adjust, takes seconds to do. Highly recommend this for folks that like to "set it and forget it".

Quick to install. Starts if you forget to and stops so it doesn't run all day, like it sometimes does, when I forget to turn it off.

Easy installation, cycles on and off, depending on humidity levels.

Top line- works great. Easy install. Terrible, terrible instructions. I had a friend looking for some extra work during the govt furlough and said she would deep clean the house, so I took her up on it. While cleaning the bathroom, she said she noticed some mold growing and I should run the vent fan every time I shower. Embarrassed, I admitted I was not the best at remembering to turn the vent fan on after showers- or turn it off…..she emphasized the necessity. This started my quest for a humidistat. There are lots of humidity activated switches on Amazon and I didn’t really know which one to select. I decided, for the price, I’d go with a name brand. More than twice the cost of least expensive, but less than a good bottle of scotch or a week’s worth of groceries. There is still some sense of security and confidence in a brand name- The installation is very straightforward if you are comfortable with electricity. If not, just hire someone. It’s literally a 15 minute install. You’ll be Charged for an hours worth of work. Whether you install it yourself or not, the sensor works great- once you decipher the programming instructions. The instructions are terrible. All the information is there but none of it makes easy sense. It took me a week of trying to understand when and why the fan was turning on. Make sure to set option 3, humidistat. It’s not really clear that it’s necessary. But it is. Once I did that, the sensor and switch functions perfectly. Turns on when I run the shower. Turns off 20 minutes later. So, in spite of the week of trying to figure it all out and in spite of lousy instructions, I am still thinking 5 stars.

Good