What classification of appliance has combustion products entering the flue at temperatures exceeding 1,000°F but not greater than 2,000°F?

The classification of appliance that has combustion products entering the flue at temperatures exceeding 1,000°F but not greater than 2,000°F is identified as a medium-heat appliance. This classification is critical in the context of the North Carolina Mechanical Code as it helps determine the appropriate materials and design considerations for venting systems.

Medium-heat appliances typically require special flue liners or materials that can withstand the elevated temperatures without degrading. These appliances are distinct from high-heat appliances, which exceed 2,000°F, and low-heat appliances that operate at significantly lower temperatures. Understanding these classifications ensures that systems are designed to safely and effectively handle the heat produced during combustion, thus mitigating the risk of fire hazards or system failures.

This classification also aids in compliance with safety standards, ensuring that installations meet the necessary guidelines to protect both property and people from the dangers associated with high-temperature flue gases.