you'll get 40% more air flow using hard galvanized ductwrk too verses the foil sliky garbage also . your gonna go buy sweet hurricane fans n then go cork em up w/ cheap ass flexable ductwork is defeating your purpose .
just my 2 c worth
xcrispi Reviewed by xcrispi on . Ventilation? help me! If you saw on my "temp increasing" my grow room temp has been increasing. i have direct ventilation from out side right now ( pics below) but i want to use venting pipes to air cool my lights and so i can start using CO2. i put all my plants under one light (1000w mh) instead of two and turned the other one off. this decreased my temp by almost 10 F and now they are around 75F. I need to know if i should have one pipe going through both lights and sucking air from the ceiling or if i should Rating: 5