If they don't even SMELL the smoke, they definitely are not inhaling enough of it to test positive for marijuana under any normal drug test.

It is actually quite easy to generally control the movement of the smoke throughout your house. All you need is an understanding of the pressure and normal air movement throughout your house, ie, if you have an heat vent blasting in your room, that will cause positive pressure to build up and air/smoke will be pushed into the rest of your house. Conversely, if you open a window and position a fan blowing out, that will create negative pressure in your room, resulting in all the smoke to go out the window and clean air from the house to be pulled into your room.
TurnyBright Reviewed by TurnyBright on . Does smoking indoors affect other people living there? HI, I was just wondering if anybody can help me with a question. I've been smoking in my room for about 7 months. (using a toilet paper roll with the drier sheets stuffed inside to hide the smell.) No one else living in the house ever notices. I live with 3 other people my family. Well, i was just wondering, even tho there is no smell, it's still the same smoke, will it effect other people in the house? like could it go through the air conditioning system and effect them in anyway? sometimes I Rating: 5