 and building code allows it, I would stay away from that. But this is how you can really keep that air quality up in that bathroom. And the other thing is you want to make sure that people use it when they take a shower or bath, and then they leave it on 20 minutes after they walk out of the room. So that way you can get that air movement and get all of those bad chemicals and moisture, because that is going to be a huge contribution to humidity inside your home if you don't.