Quote Originally Posted by 771subliminal View Post
not if you get a swamp cooler it uses water to cool and recycle the air no exhaust needed

this is a small one but its the idea
http://www.air-n-water.com/product/ka70.htm

things change I guess

Our old swamp coolers (in new Mexico) were fed water and had a relief valve. When the water reached a certain temp, the cooler dumped the water and a pressure regulator filled the cooler with new cool water. They looked like a huge car radiator with a huge fan behind it.