imp: well the high was 108 degrees outside. Inside my cab just running the cfl's my temps were: min 84 max 102 20% hum all day. Whats up with the co2 deal I've read a lil about them, are they exspensive to set up,any suggestions as to ventilation on this bad boy? should I use like 4 inch pvc and some 80mm fans will that cool it down as much as I want it? help!!!