Yes, keeping humidity low is especially important at night.
I keep my exhaust fans running, but not the fans that circulate air within the room.
How you set yours up depends on the space and your humidity levels.
stinkyattic Reviewed by stinkyattic on . Ventilation Do you turn your intake fan & Carbon Filter off during the dark period of flowering or keep them on? I've been keeping them on thinking it'll reduce humidity and bring in co2 is that right? Rating: 5