So me and my brother smoke pot. Mom and dad dont care, and even promote it because they'd rather us do it at home than out somewhere where trouble could be had.
Dad has been stripping things for copper, and he came accross a bunch of PC fans. Three fans, some cardbord and a drill batter later, we made something strong enough to pull the smoke and the stank out! :D
They're not small pc fans, pc tower fans about 4.5 inches tall, and an inch deep. With cardboard 'slats' to take up the empty space in the window. Going four fans wide would require adding more wire, so three is perfect.
So to you guys who smoke, but wished you had some sort of device to haul it out the window, i suggest you go steal a drill battery (Like the ones that go in saws-alls) and go dumpster diving for some computer parts. Or if you're lucky like us, just ask to borrow a battery and to have some of the fans xD
It works so well i was thinking about marketing it, but i dont think people would pay ten dollars for a single fan and some cardboard lol.