[masraum]

Originally Posted by tcar

If you have an exhaust fan (or turbines) at the top of the space, where does the make-up air come from? Open window? Louver in the door? Should be low in the space.

Turbines will do a pretty good job if there's adequate air supply.

Should not suck air from the house... that's against fire code anyway.

So, if it's 130 in the attic and 120 outside there in Dismal, kind of a waste of money.

WHen I had a home here in Houston, it would get up to 140° in the attic while being 90-100° outside. I had a ridgevent, but the house had a hip roof so I believe it was inadequate for the type of roof that I had.

Not my old roof, just pics from the Internet.




I believe a solar attic fan or gable fan would be a good thing in a very sunny, hot environment as long as you have the proper intake and exhaust sizing and locations.