Masonry chimneys should extend at least how many feet higher than any portion of a building within 10 horizontal feet?

Masonry chimneys are designed to provide safe and effective venting of combustion gases from heating appliances. One critical aspect of chimney design is ensuring that the chimney extends high enough above any nearby structures to avoid issues such as downdrafts, which can lead to smoke and harmful gases entering the living space.

The correct answer indicates that masonry chimneys should extend at least 2 feet higher than any portion of the building within 10 horizontal feet. This requirement helps to ensure adequate clearance and proper airflow, contributing to the safe operation of the chimney. The extended height allows for better dispersion of combustion gases and minimizes the risk of obstruction from wind or other environmental factors.

It is important to adhere to this standard for safety and efficiency, as a chimney that is not sufficiently elevated can lead to dangerous situations, including carbon monoxide buildup or the re-introduction of smoke into the home. In this context, the focus is on maintaining proper chimney height to ensure it performs its function effectively while keeping occupants safe from potential hazards.