Winston wrote:

I'm now tearing off the vent in the garage roof to
install a more reasonable solution there.

I've replaced it with this solar - powered attic vent fan:

http://www.airvent.com/homeowner/pro...olarRoof.shtml

http://www.lowes.com/pd_269916-228-N...n&facetInf o=


For the first time in years, the garage is now cooler
than the air outside.

--Winston