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?
KHAN Reviewed by KHAN 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