My vent goes from the basement, through 1st and 2nd floor walls, through the attic and 4' above the roof. With a couple of horizontal runs in basement and attic it's nearly a 50' run total. I don't usually need to turn on the booster fan. The wind-turbine is usually sufficient. No filter needed because the outlet is 35' above ground. I check it occasionally by blowing smoke at the vent in the grow room, and it gets sucked right out.Wow that question wasn’t for me but now you got me thinking I should be venting outside.. I had thought about it but didn’t find anyone who thought it was a good idea.. I am running 6 plants at least most of the time..
Ok that leads to more questions how far of run can you get away with without needing a booster fan in-line too? And do you think I can vent two tents out the same outlet if both have backflow preventers?