Thaks for that info, my temps are unfortunatly a little warm (mid 80's)but i'm building a grow box to control that 4'x30"x20" CFL's and just ordered from HTGSupply a Suncourt 4" Inline Duct Fan 80cfm and a GrowBright Pure Flow 4 Jr. Carbon Filter. I'll probly finish the box today and put a temporary fan in it.