Hello,we have been experiencing some very high temps. for only being the beginning of june.Its been in the 90's during the day and only going down in the 70's at night,so i told the dh i wanted him to install a fan.My question is,should we have it pulling air out or blowing it in? which works better in the heat? The cieling is at least 10 ft. high and the window i want to put it in is about 5 ft. high.We are mounting it on the south side,on the outside (was hoping it wouldnt get as dusty if it were on the outside)So what do you all think? Any advice is appreciated.