I'm currently growing plants that smell like someone did a burnout on an animal carcass, and that animal maybe ate some berries before it died. When it's lights-on and I do my work, and i leave the room & come back in, HOLY SHIT it's so dank i can feel it. Shut er down, and the room is pretty much fresh air again within 10 maybe 15 minutes. Everything goes thru a cheapo carbon filter, and vented into the attic. So far, cannot smell anything outside my house. I should get a new filter ready though