Robertsanswered grow question 4 years ago Fans and air movement should be regular. They are using co2 and putting oxygen in air. They need to breath same as you and me. So depending on how big your area is, fresh intake is needed often. My fans run 24/7 and my fresh air runs about 2 or 3 mins every 10 mins 24/7. My temps range from 81 to 83 during light hours and drop to 65 to 70 depending on time of year for dark hours. This will all help keep humidity levels better as well. Mine bounce between 50 to 75 percent. Hope this helps and happy growing. Good luck 🌲🌲🌲👊