What is the minimum required distance for exhaust outlets from exterior walls and roofs?

The minimum required distance for exhaust outlets from exterior walls and roofs is 10 feet. This requirement is in place to ensure that exhaust gases are adequately dissipated into the atmosphere, minimizing the potential for harmful fumes entering living spaces or affecting air quality. By maintaining this distance, any potentially hazardous gases can diffuse properly without being re-entrained into ventilation systems or accumulating near doors, windows, or other openings in the building.

Additionally, this separation helps protect building occupants from exposure to carbon monoxide and other combustion gases, which could pose serious health risks. It also minimizes issues related to backdrafting, where negative pressure can cause exhaust systems to draw air from undesirable locations, potentially leading to safety hazards. Proper adherence to this distance is critical for maintaining safe and efficient ventilation systems within buildings.