That fan is for a window it appears. Personally I would never buy an exhaust fan that did not have a CFM rating to let you know how much air it moves. Your question would be answered by a simple CFM rating and a little reading on the proper size CFM depending on your grow space.
deftdrummer Reviewed by deftdrummer on . Will this fan work for ventillation? i was wondering if this intake/exhaust window fan will work for ventillation in my 2x7 foot closet . here's the fan that i have http://www.laskoproducts.com/fans/model_2138.html . and also this sounds stupid, but what setting should i put the fan on? both intake? both exhaust? or one intake and one exhaust? :confused: :confused: :confused: Rating: 5