4x5! You got it all laid out! Can ya tell me what CFM the hockey table fan is? I'd think it would be a 300 or better! Pressurized with the passive system you have! fresh-air from below,with the box being insulated of course!Buy a roll of ducting insulation it's even got a silver finish.silver tape to help keep the construction work being done!Use that foam celitex board for the walls.It comes in 4x8 sheets. No screws,nailing, sawing,hammering! razor knife.You can just score the board with ya knife on one side and fold it! Now you can get it in any scuttle-hole there is!Tape the score line back with 3 inch foil tape!Just some ideas!

Ga Grown
GaGrown Reviewed by GaGrown on . Atic Heat problems Hi There, At the moment , I am growing in the atic and the temps get into the high 90s cause in summer its like a sauna up there. What about air coolers ,do they work? I have a 200mm intake & 200 mm out fan, and osculating fan and a dihumidifirer all under a 400wt system. I do run the lights when the sun goes down, to try and keep the temps down.My last grow Oasis from Dutch passion(feminised) turned into hemafridites and i got a crap yeild, but loads of seeds. never again will i buy Rating: 5