Oh man that is not an oven its a pressure cooker! Very nice one though! My greenhouse is 48 x 36, approx 1740 sq ft, and I have the entire back 36 ft as a vent that is also a swamp cooler. It has 6" thick 'honeycomb' (a big paper filter thing) that water can be made to run down, and the two 4 ft x 4 ft exhaust fans in the front pull the air through the wet filter and it instantly lowers the temp and creates humidity too. I live in Florida where the summers can be brutal, but my part of Florida also can get colder in winter so I needed a greenhouse, not a shade house. I also have fans up in the attic that more air around to keep it from getting stagnant.
