The original imported second-hand central air conditioner is located in Zhengzhou, Henan Province, mainly distributed in Zhongyuan District, Airport District, High-tech Zone and Erqi District. Specific manufacturers are: Kangxing Industry, Ruifeng Recycling, Henan Air Conditioning Recycling Company, etc.

Second-hand central air conditioning refers to air conditioning equipment that connects one or more indoor machines through copper pipes and then provides refrigerant to outdoor hosts.