How much higher must a chimney extend above any portion of a building within a horizontal distance of 10 feet?

The correct answer indicates that a chimney must extend at least 2 feet above any portion of a building that is within a horizontal distance of 10 feet. This requirement is essential for ensuring that exhaust gases from the chimney are adequately dispersed above the roofline. By extending the chimney this height, it helps prevent the possibility of combustion gases from re-entering the building or affecting nearby structures, which could pose safety hazards.

In addition, this height helps to ensure that the chimney effectively maintains proper draft, allowing for efficient ventilation and reducing the risk of backdrafts. Proper chimney height is critical for maintaining good airflow, reducing creosote buildup, and ensuring that any pollutants are correctly exhausted into the atmosphere, thereby adhering to safety and environmental standards.

Understanding this requirement helps reinforce safe practices for chimney installation and maintenance.