What is the minimum height for exit terminals of mechanical draft systems above grade when next to public walkways?

The minimum height for exit terminals of mechanical draft systems above grade when adjacent to public walkways is established to ensure safety and proper ventilation while also preventing any potential hazards for pedestrian traffic. The correct answer, which specifies a height of 7 feet, is based on building codes and safety regulations designed to keep exhaust and other emissions from mechanical systems away from individuals using the sidewalks or walkways below. This height helps to minimize the risk of exhaust fumes entering the breathing zone of pedestrians and reduces the likelihood of interference with normal activities in the vicinity.

Additionally, observing this standard height is crucial for complying with local codes and ensuring that the systems operate safely and effectively, without compromising public safety. By adhering to this requirement, plumbing contractors can ensure proper installation practices that align with health and safety regulations.