Hey that is pure genious i really like that!!!! I get exactly where your coming from like an air con system. Im thiking about doing this about october and through the winter i dont think temp control will be too much of a problem apart from maybee night temps getting to low but for the summer some kind of extra cooling is gona be essential. I was thinking if i vent up into the greenhouses i could keep them warm enough to grow tomatos or strawberry all through the year But im thinking i might have to up the budget a bit...