The supplier is not honest in dealing with more than once and tries to deceive the customer again.

I connected to bathroom to circulate air from bedroom into it since I did not have any heat other than the heater, light fan in ceiling. I added the switch in the bathroom to an outlet I put in the closet. When the fan dies, I have a second one and only need to unscrew from wall wall to replace. The vent has autoclosing doors to keep noise and the moisture from blowing back into the room. I am very satisfied.