Research on nearly zero energy heating of a commercial office building in North China

Taking a commercial office building in North China as an example, through the continuously testing, commissioning and retrofitting in the heating condition, summarizes a crucial technical route, reaching the heating energy consumption of 0.05 GJ/（m²·a） in 2017, which is much lower than 0.11 GJ/(m²·a) in the EUs heating standard of nearly zero energy building. Discusses the technical measures for nearly zero energy heating. The results show that a separate control system for shopping centers, hotels and office buildings should be set up to meet the different loads demand of the commercial complexes in North China, and free cooling system has good economic benefit for a four-pipe water system.