Good evening. My wife and I are having a discussion about fans in the 4 bedrooms upstairs. We have a 2 story foyer and an open hall to the bedrooms. I say having the fans in each room blowing air out of the room and into the foyer will create a slightly negative pressure in the room and draw more cool air into the room from the vents. My wife states the fan should be oscillating in each separate room to keep the air moving in the room. Comments please.