What is the minimum required height for plume discharge above an inlet to a building?

The minimum required height for plume discharge above an inlet to a building is generally set at 5 feet to ensure that any exhaust emissions do not re-enter the building through the air intake systems. This height is established to avoid any potential negative impacts on indoor air quality and to ensure that the exhaust, which may contain contaminants or odors, is adequately dispersed into the atmosphere before it can recirculate back into the building.

Setting a discharge height at this level is also crucial for compliance with building codes and regulations, which are designed to protect public health and safety. Insufficient height could lead to the exhaust affecting occupants inside the structure, particularly in commercial settings where many people may be present.