A type B-W gas vent must terminate at least how many feet in vertical height above the bottom of the wall frame?

A Type B-W gas vent is designed for use with specific appliance installations, particularly those utilizing various types of gas appliances. The regulations dictate that the vent must terminate at a certain height to ensure adequate dispersion of the gas and promote safety. The requirement that a Type B-W gas vent must terminate at least 12 feet in vertical height above the bottom of the wall frame is based on standards established to prevent the accumulation of dangerous gases around the structure and ensure proper venting performance.

The reason for the 12-foot requirement includes ensuring that the gases can disperse safely away from occupied areas and structures, minimizing risks of exposure to harmful emissions. By adhering to these standards, installers can help avoid potential safety hazards while optimizing the functionality of gas appliances, maintaining both compliance with building codes and the safety of individuals in the vicinity.