Detect Smoke Leaks Indoors

What happens here

Once smoke begins to fill the vent system, have an assistant (or go yourself) inside the house to observe where smoke emerges. Pay close attention to areas where sewer gas smells have been previously noticed, such as bathrooms, near fixtures, or access panels. The video shows smoke clearly escaping from a light fixture in the bathroom ceiling, indicating a leak in the vent pipe within the ceiling or wall cavity.

Goal: Identify the exact locations where sewer gas is escaping into the living space.