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- #821
Your just recirculating the air. Much better to exhaust the warm air outside and replace with fresh air.I have an 18 in fan blowing into into the the room from the floor. Cold air in the bottom, hot air out the top of the doorway, so lots of air exchange. I think it’s just the temperature boiling off terpenes. The room is probably 5 C warmer than my winter grows with 1600 W of HID. Got the new light so that will help come Sept