To solve that problem, just get a little bigger fan.QUOTE]
Are you using a 1000 watt system too? Because that's a whole new ballgame when you step up to the 1k watter.
If you read my posts, then you will see that I am using a 1000w. And like I said before, its relatively easy to keep these systems cool, as long as you got a decent exhaust fan. I think my fan is rated 170 cfm. Which is hardly the size of a lawnmower tire. I use it to cool the light and run the filter. Absolutely no problems with heat. I keep the light less than 1 foot from the tops. It stays about 75 in my room and inside the tent. A lot of heat in most setups is generated by light absorbtion. When u have a tent like this, There is VERY little light absorbtion, so there is little heat to contend with.
He's probably right about absorbtion. I have (had) a 4x4 tent w/1000 and heat is not a problem at all. The tent is ALWAYS about 2-5 degrees warmer than the garage it's in. It's almost always closed up (2 vents open at the bottom).
I have to run a heater in my tent. I have a 8" inline turned down to about 300cfm. I'm replacing it with a 6" HO. Im also putting a thermostat on the hood fan so that the light will heat the tent when it gets cold.
If you have a good tent (GrowLab), a good air-cooled hood (Cool Sun), and a decent fan (Can-Fan), you should not have any problem with heat.