What is the correct chimney clearance above the highest point within 10'?

The correct chimney clearance requirement is based on ensuring proper ventilation and preventing hazards associated with the emission of exhaust gases from the chimney. In this case, the requirement is for the top of the chimney to extend at least 2 feet above the highest point of any roof or structure that is within a 10-foot radius. This clearance helps to ensure that smoke and other combustion byproducts are adequately dispersed away from the roof line, minimizing the risk of fire and improving the efficiency of the chimney.

Choosing this height promotes safety by reducing the likelihood of fumes entering living areas or igniting nearby combustibles. Moreover, this standard aligns with common building codes and practices designed to enhance the safety and effectiveness of residential heating systems.