Hello! I have a tent going with 4k watts. I have a single exhaust fan to cool the sealed reflectors. However, my temps are staying at about 85[FONT=arial, sans-serif]° F.
You might be able to get away with a 12k BTU home depot special if the temp is only 85... was this on a very hot day or just on average? A pro will tell you that you'll need 18k BTU or higher for a space that size with 4x1k HPS.
Are you pulling through a filter and then pushing the air through all four lights to the outside of the building that the tent is locatedin?
yeah 85 was on a very hot day (100+ outside) I have the fan outside the tent, and it's just sucking hot air out of the tent, and all the lights are connected with 8" ducting.