Dbozz628
Well-Known Member
I placed the cfl's in there and down-graded the fan and the temps were higher than before. So I put the HPS back in there and the inline fan, made a temporary duct muffler and increased my ventilation and temps went down to 80, which is about 3 degrees above ambient. The increased ventilation is what helped and the duct muffler helps the noise. If your still having problems with heat, increase your fresh air coming in while still maintaining negative pressure inside your cab.