Hi all, first time posting on this forum. right the problem I have is I got a 6ft by 3ft grow room, which is also 6ft in hight and goes down to 3ft at the back (growing in a loft). I have 1 4" inlet and 2 600w one is a cool sha the other is a cool tube lights that's hooked up to a 8" fan that is reduced down to 5". Also have a tower fan blowing over my 6 bucket rdwc. Now the problem is I can't keep my temps down I get around 87f and im stuck on ideas. Should I maybe change the inlet to a 5" fan instead of the 4? If need any pics up think I could sort some out. Let me know what ideas you have please. Thanks, skulljester86.