Oh of course you would need to refill it but my entire room now smells like laundry and its still coming for over an hour now. Ill let you guys know how long it keeps pumping out the good smells.
aight keep up the Research mate! maybe do this.. you know how a coco carbon filter is made? make somthing simmilar but stuff like 5 packs of them into it.. so u wont have to change it for like a month lol, and it will smell fresh but lets say get a pale... cut the bottom off tape a plastic bag around it, have lots of small holes in the bag... put 5 packs of laundry sheets in, and there u go cheap and efficant
Ok so I crunched some numbers and being conservative one box of 160 dryer sheets should mask a small grow for near a month ( figure it takes 4 hours for one sheet to lose scent.