We're also installing a new squirrel fan to help out with light. I dont know if I said before that we were using 2 inline fans rated at 250cfm, which were junk. We had one hooked up with a T to exhaust both compartments, and the other one was dedicated to exhausting the light. No go. Temps were still way up and we had to leave it open until we got this new fan. works like a charm...almost. It kicked the temp in the right side down from 99F to 86F but I'd like it to be a little lower. We only replaced the fan for the lamp. Gotta fix the rooms' exhaust fan now and it should pop it nicely down to 82 or so.