GB/T 10820-2011

This standard specifies the calculation methods for thermal efficiency and the thermal performance test procedures for small-scale boilers used in daily life, such as those for heating, hot water supply, or steam generation in residential buildings, hotels, and small commercial facilities. It is applied during the design, manufacturing, and quality inspection of these boilers to ensure energy performance compliance and to provide a uniform testing basis for energy conservation assessments. The standard is particularly relevant for manufacturers, testing laboratories, and regulatory bodies in China overseeing the energy efficiency of domestic and light commercial heating equipment.