What is the minimum height at which every exhaust outlet located above the roof must terminate?

The minimum height at which every exhaust outlet located above the roof must terminate is specified to ensure adequate dispersal of exhaust gases and to prevent them from re-entering the building or affecting surrounding properties. Terminating at a height of 40 inches helps to mitigate any potential hazards, such as the build-up of harmful fumes, and ensures compliance with safety and environmental standards.

This height is particularly important in urban areas or any context where buildings are close together, as it helps to ensure that exhaust is effectively vented away from windows, doors, and air intakes. Additionally, this requirement is aimed at promoting good practice in mechanical ventilation design and maintaining air quality for occupants. By adhering to the specified termination height, the system can also perform more efficiently and effectively.