Final answer:
Type L venting systems should have a cap at least 2 feet above the roof and 2 feet higher than any part of the building within 10 feet, following local building codes.
Step-by-step explanation:
The question refers to the specifications for terminating Type L venting systems, which are special gas venting systems designed for specific appliances. Type L venting systems should have a cap at least 2 feet above the roof and 2 feet higher than any part of the building within 10 feet, following local building codes.
According to most building codes, these venting systems should terminate with a listed and labeled cap that is installed at least 2 feet above the roof and at least 2 feet higher than any portion of the building within 10 feet. The exact specifications can vary by locality and the manufacturer's instructions, so it's important to consult local building codes and installation guides.