In 2019, Energy Foundation China supported the China National Institute of Standardization to provide scientific evidence for the revision of China’s energy efficiency standards for variable refrigerant flow (VRF) air conditioners. The resulting report analyzed the latest energy performance and sales statistics of VRF products in the market, collected and studied VRF-related energy standards of different countries and regions, compared VRF energy efficiency indicators of Integrated Part Load Value and Annual Performance Factor, and examined the cost-effectiveness of various VRF products. This technical report was used to support the ongoing revision of the minimum energy performance standards for VRF air conditioners in China.