Broan Model QTXE110S 110 CFM Ultra Silent Humidity Sensing Fan, White Grille

I bought cheaper fans before and decided recently to buy this expensive one, but quiet and lots of CFM fan. The installation went very well, it wakes up automatically, which will be very useful in the kid's bathroom. And I have to say it is very quiet. I am really impressed. Quality seemed also much better. Even after long and hot shower not even single drp of water or fog on mirror. I would love to replace other fans now. I am glad I bought it. Money well spent. And the externel vendor selling it on Amazon (Northside Service Company) was great. There was one piece broken a little. They shipped replacement part quickly and no questions asked. Highly recommended.

Humidity sensing only works properly in the winter, when the background humidity is low. The rest of the year the fan turns itself on constantly, when bathroom has not been used. This happens even though the house has a central dehumidifier that keeps the background humidity below 50%. I set the sensitivity control on the fan to MIN but the problem remains. I had 3 of these fans installed when the house was built, and they all do the same thing. I ended up unplugging the humidity sensors.

I had been bothered by my rental house's the bathrooms moisture issues, there were black/green spots in the celling, renters don't care to turn on the fan when they take showers, even they turn on the fan, it's not strong enough to suck the moisture out, plus the noise, so I did lots of reserch and found this wonderful piece, installed it couple of weeks ago, and it works wonderful, absolutely no moisture anymore, and hardly to hear it, love it, purchased another one and now I can sit back relax...

couple of things to remind:
1) check your existing fan hose/vent, make sure they are really vented outside the house, not vent into attic(like mine, we had worked a solution to vent it out)
2) check your hose/vent to see if it's 4'' or 6'' fitting, this piece is 6'';

money well spent, I have recommended it to all my friends....

cheers!