*Stealth*

all u need mate is like and cheap little extractor fan thing for like 40-50 pound and some ducting i got a 600 wat hps and trust me u need somthing to get the heat out they are hot when they in a small space like u are talking about might good to get a heat shield for it too for like 13 pound u dnt need to spend loads but u will have to spend something if u want to keep the temp down in your grow space last summer made my grow space go to like 50 deg C and fryed all my plants hehe im in the loft though but i now have 4 white widow females 3 weeks into flowering hope this helps

guys if i got a cool tube would i be able to grow in that space?

You could hook the cool tube up and try it. Of course, that means venting in a similar fashion to how I described earlier. 6" cool tube / 4" converters on each side and inlines at either end - one push, one pull. You will STILL want to vent the rest of the cab w/ fans and the like.

srry to hear about your problem, with a space that small you should be running a 150 maybe, ive got an area a big bigger then that and with my old exhaust which was a small desk fan modifyed into an exhaust into my attic i excedded 110f with only 6 CFL's. You would probobly have a house fire with a 600w in there

wut about replacing the common big ass water heater for a on demand version , which is like the size of a breaker box, then using your water heater room, as ur stealth. Just an idea ive been kicking around, but water heaters usually by code have to have a vent, which u could put a splitter on, to run your exhaust off of. and it would be adding benifial co2 right? or maybe that just destined for a FIRE.