Thanks all for your replies. Any real life info helps! Dean let me know if the 2 fans help move air and how much if you would. Burl I have looked in to these, in fact I bought on and trying to make it work. Judith I am in the same boat, solar exhaust fan cost a lot and I am always trying to find a cheaper work around. please let me know how the attic fan works. Mike that is my plan to use as much passive vent as possible just wondering if a lower cost solar fan would help the process. Again thanks all for the info