What is the minimum height a chimney must extend above any portion of a building within 10 feet?

The requirement for a chimney to extend above any portion of a building within 10 feet is designed to ensure that the chimney effectively disperses combustion gases away from the structure, promoting safety and proper ventilation. The minimum extension specified is 2 feet above any portion of the building that is within 10 feet, which helps prevent the potential for carbon monoxide and other harmful gases from re-entering the living space.

This height requirement is particularly important because buildings can vary significantly in design, and neighboring features such as roofs, walls, or other structures can impact airflow. By ensuring that the chimney rises at least 2 feet above nearby structures, it minimizes the risk of downdrafts, which could cause dangerous emissions to infiltrate the building.

Understanding this standard is crucial for ensuring compliance with safety codes and for maintaining proper ventilation in residential buildings.