got me looking at this one,I'm not in my flower area to take a pit. It's a 6" duct, taped to my 8" intake fan. I don't run a fully sealed room. I do of sorts. Har to explain. I use a big semi sealed room, with a built flower room with intake /exhaust. And run c02. I use 1 bottle a week at 1000ppm. Don't care if I lose a bit. Yields pay off in the end. I just tape the ac duct to the top of the fan. Like putting a 6" tube I to an 8" tube. I've had it set up this way for 4+ yrs with great results with and w/o co2. I'm upgrading to a Mini-split.
DO NOT BUY ACTIVE air dual hose 14 ac. Pile of garbage. Couldn't get a 3x600 room below 80* ambient. I rock an LG 14k and it works perfect. Even got room to 70* with 3x600 ac hoods.
or this one for my house, and my grow room.. I think it will control 2 different areas...