spend the $$ on a good fan we use the high velocity round wire caged fans at work in the summer time they can really move a lot of air and only cost 40-60 $$ for a good one or if your a more mechanicly inclined kinda person get one of those big MF's that go in the ceiling and draw the air up in to the attic ..it will require a lil framing and electrical work but they really kick ass. i installed one for my grand parents years ago [ over 15 yrs] and it still works great and will also save on cooling costs in the summer