what temperature do i set an attic fan at?

Answer 1

90 degrees is what I have mine at.

Answer 2

Answer # 2 has a clue, and certainly there are thermostatic fans. In your case and the intended use, I have to say what is known as fact,"fans" are meant to cool people not rooms"
That said however, in it's intended use, it is doing the best in its design to remove heated air from the attic. Consider however that an attic may get up to well over 100 degrees F in temps, and the fan would be functioning most of any 24 hour period.
It's all personal opinion anyway, about what you might do, but certainly other forms of venting would help, and also checking R values of insulation. Hopefully you aren't directly venting household temps/or AC efforts into the attic to be carried away by the fan.
In my own opinion any other NON power use venting certainly makes more sense, especially if the area isn't used as a living space.

Answer 3

Mines at 95 as well. Figure your attic will be up to 20 degrees hotter than the outside temp, or more if it's a dark color roof. Maybe start there and adjust accordingly if you have easy access to it.

Answer 4

100F is plenty low enough, unless you go up in the attic much, otherwise you will be wasting electricity on days when it is not that hot out, 'cause your attic is so much hotter than the rest of a house.

if you reroof put in soffit and ridge vents and give away the fan

Answer 5

I set mine at 95. Gets pretty hot up there fast so if you set it too low it will run almost constantly.

Answer 6

Huh??? I didn't know fans had temps, just speeds. If it is speed your talking about, what ever is comfortable for u. It's trial and error. The hotter it is, the higher the speed.