No No No, the key is to put a window fan in the window of the room you smoking in and put it on exaust(or put it in backwards)this creates a lower air pressure in the room resulting in air form the rest of the house to pour into the room around the door keeping the smell from ever having a chance to escape. To insure that it will work for you put a window fan in backwards turn it on with the door closed and feel around the door for air rushing in... If there isnt any you may need to crack a window in another room to provoke the movement of the air. It worked well for me years ago with a shitty window fan. I'm sure with the fans now it will work even better.