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I recently purchased a home with a fairly new pole barn (metal siding and roof). It is 30' x 40' x 18'h. 900 sq. ft. of the space will be used as a dance floor, so it will be open to the 4/12 peak. During the summer it gets very warm and would like to use natural circulation using a ridge vent (US Sunlight solar vent) to help cool the space. My concern is heat lose during the winter through the vent. Should it be sealed off during the winter? I'm also going to install a swamp cooler. Any suggestions?
The 2 estimates I've been given on the swamp cooler, one contractor says I need a 4500 swamp cooler and the other says I need a 6500 swamp. What gives?
Thanks
9/19/2010