greenhouse swamp cooler
 

hey Ron, have a arched type greenhouse 12'wide 24'long 7'tall at center. would like to use it during the summer here in crescent city fl. for these dimensions how large would the pad need to be for a swamp cooler?

It's 4 ft. high so you need to go the full width. Maybe 10 ft. because of the curve. Put it on the north side and fans on the south.