ya, i have the exhaust running and my intake fan is big and the passive holes behind that fan bring in some hottttt air during the day. Think I should keep the intake fan off during the day and just leave exhaust on? Would it be worth shocking the plants to get them on during day and off at night?if your running light of during the day timeand temps are riseing in yougrowroom then yes you wantto run a exhaust fan.![]()