Type L vents must terminate how many feet above the highest point of the roof penetration?

Type L vents are specifically designed for the venting of gas appliances and must be installed following certain code requirements to ensure safety and proper functioning. The correct termination height for Type L vents is 2 feet above the highest point of the roof penetration. This requirement is established to minimize the risk of exhaust gases re-entering the building and to ensure proper draft in the venting system.

By terminating at the specified height, it helps to create a sufficient upward flow for the gases, preventing any dangerous backdrafts from occurring. Additionally, it assists in dispersing the exhaust gases, reducing the possibility of them interfering with air quality near the building.

Other termination heights listed do not meet the code requirements for Type L vents, which emphasize the importance of following these standards for safety and effectiveness in venting applications.