I want an attic fan in my next house.
Seems they never do this any more.
1. Why don't they do it?
2. How hard would it be to add?
I was told by an HVAC commercial guy that the electricity you use to run an attic fan usually doesn't save you money over the electricity you use to run an AC fan, so don't do it unless you are doing it for the fresh air and not some idea of saving money. I haven't calculated it my self, but sounds reasonable. I mean, attic fans are big ass fans.
That said, there are certain dishes I cook that put of a little smoke. Attic fan clears that crap great.
If you add one, the fan, rough in, and electrical should run you around 1.5 - 2k, depending on how hard it is to access the place you want it and if your attic is vented in such a way thay it would actually work.