Back when I used to smoke indoors a lot I used to just open a window and blow the smoke out. I would also turn on my heater in my house/car and then let mother nature do the rest. Depending on how cold it is outside or warm inside the smoke will be sucked out of the window because the temperature is trying to stabalize in the enviorment. FYI this doesn't work in the summer with an AC on in the car/house and a hot day outside. I've tried it a few times and although it works way way better in a car, it still worked in my house just the same.