Thanks all.. sound is not going to matter. Actually I find the sound of a fan soothing at night for sleeping. Since I work during the night and sleep at day I always use a sound machine, so this will be great. I will have to contimplate on whether the additional reverse air flow will be worth the $50. We are looking at getting 2 of them put in, so that will actually be $100. One in the vent over the cab bed and one in the vent in over the master bed. We have a vent in the bathroom, but it already has the little exhaust fan. We will just put a cover over that one.