What is the minimum termination height of a single-wall metal pipe vent above the roof?

The minimum termination height of a single-wall metal pipe vent above the roof is established to ensure safety and proper venting of gas appliances. A height of 2 feet above the roof is necessary to create a sufficient rise for the vent to effectively disperse exhaust gases, preventing them from entering into the building or affecting nearby structures.

This height helps ensure the vent gases are released at a safe distance above the roofline and avoids potential hazards associated with back-drafting or the accumulation of flammable gases. The specific height is outlined in national and local codes which prioritize the safe operation of gas appliances and the well-being of occupants. Other options, while they may seem adequate, do not meet the established requirements for effective ventilation, which underscores the importance of adherence to these standards in maintaining safe practices in gas installation and maintenance.