I love my budboxx. I got the htg "euro hood", a 400 watt hps, a valueline 6 inch inline (110$), a 6 inch charcoal filter, and a normal house fan for circulation. It stays the same on average as the ambient tempt. In winter and at night it has been getting cooler and now, lol, i got a little thrift shop heater. In summer to keep it cool if out side temp gets hotter than 85 you are gonna need an air conditioner outside in the room or a portable one hooked up to vent. No way around that. Also i use passive vent cuz its winter but a 30 4 inch fan would help a few degrees i bet.
I love my tent. Ten times easier to cool than a closet, bathroom, and a normal room. Keeps the smell contained so i can filter that shit.
I got the cheap tent, 4x4x6.5 for 130 plus shipping off ebay. My only complaint is that it has 3 vents instrad of 4. Easy fix! I gonna buy that 99 dollar plus free shipping next. I love to ebay!!! rofl. you see i feel like this is an add, a crappy add.