well to combat heat u could buya cheapo window mount a.c, if u can cut a whole out of the wall i think 1 1/2 ft by 2 feet,drill a hole in the bottom of the ac in the back.attach a half inch line leading to a bucket and it will drain all the water for u.im not sure how much of a heat increase there will be,i tried calling my friend to find out but he hasnt called me back yet.on the up side though you can run higher temps when using co2. also if u cant go knocking holes through the wall u could take the door off and install ply wood and u can cut a whole through that,put in a door knob and your off growin in a ac controlled room.your room dimensions are a good size and i personally think u would bennefit from a burner over co2 tanks,plus your back wont hurt as much from lugging them in and out of the house.