in my tent there is a 400w mh, which has an inline duct fan hooked to it. most of the time the temp stays around 70, with the door open. i have 1 8" fan blowing into the tent, 1 on the other side extracting.. the room is like 10x12 and the window is open always. should i run a fresh air duct directly into the tent, and one extracting so i can keep the door closed?? or do i have enough airflow?? thanx
Yes you should one in one out.My tent always stayed cooler when it was shut then temps would clime when open but you have to have negitive pressure for it to work rite more air being pulled out then coming in my tent would suck in about 6inch on all sides. Plus it should be shut when flowering unless the room it is in is completely dark no light whats so ever not even a crack of light even light glow around a door is to much and will mess up your whole grow.