I just found these, in an effort to tune up my current grow cab. I want to make it a lot more stealth, and the fans are really my main problem. Link I would purchase 3-4 of them, and if my calculations are correct, in the space I have, it would cycle the air 2 times per minute with the Ultra Low Noise Adapter put on, and would only be 5 dBA. (1/2 as quiet as you breathing). 1 for intake, 1 for the carbon filter exhaust, 1 for an internal fan, and then 1 as an exhaust for the veg. chamber. Anyone try them before?
