Reply To: Ventilation System / Exhaust

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I personally run them 24/7 along with intake fans. My other fans just ment to move air I have on same time as lights. In your situation I’d likely do the opposite. It turn intakes and exhaust off and leave other fans going to try and keep as much heat in as possible. You could also stick in 5 gallon buckets full of water if you have room. They will retain heat when lights on and also help keep humidity up. Also try to run light at night when it’s coldest.