Fog you are right about placing the exhaust at the top and the intakes at the bottom. Hot air rises, so you are able to pull it all out from the top, and suck the cool air from the outer room in from the bottom.
Adieu
BlueBear Reviewed by BlueBear on . Air pressure in the grow room I noticed itā??s extremely hard to have a perfect balance of air coming in from outside and air getting out. Iā??m especially afraid of the negative air flow condition (more is coming in and less going out) as it will disperse the smell trough out the house. So I was thinking of trying to get a little more air going out than coming in to make sure the smell stays in the grow room. Is this a bad idea and if so, how can I get the exact pressure/ratio (in to out) ? Thanks Rating: 5