oh yeah ona es da shit mang. I have my 600w dumping into a crawlspace and I would need a ton of ona for that so I just use a scrubber but for my space..a jar of ona on my nutes shelf. can smell really anything less you get your face in the gals. As for the heat problem im currently running a 600w in a 5ft by 5ft by 2.5 ft deep closet. I have my 600w cooltubed plus a huge floor fan to push out the hot air and stimulate my gals, still hot as fuck. Luckily i was cleaning out an old house and there was a blue squirell cage fan sitting there running (I guess to circulate the air in this dank ass house) anyway this thing is as big as a stack of 4 high school text books but it fucking ripsss. I'll look more into it but this fan puts off icey cold air, and when its 100 out you dont get icey cold air outta no fan. Well I was running my floor fan full blast (during lights on) to keep it in the mid eighties to ninties..hot as a bitch..especially when your thermostat is reading 73. anyway I "borrowed" this blue little wonder fan drilled it to the wall and Im using that as supplementary exhaust. Now instead of keeping my space open all the time, I just slide the door a crack when the light flips on and hit the switch for my lil baby blue. Anyway my space is consistantly 76degrees, its a beauty and growth is going crazy with the comfy temps. Soil dries out less. What im gettin at is check your exhaust, 2:1 exhaust to intake ratio is probably best..and after visiting the pawn shop today..dude they gotta lot of squirell cage fans, I always see em on the net n shit for sooo much. But at my pawn shop they got fatty industrial squirell cages for 55bucks. They got the kind a closet grower would appreciate for around 20 bucks (and god its a 20 well spent). Down here at the pawn shop...