DunAn Precision is one of the premium air conditioning/refrigeration component providers in the world. It owns the largest production base of service valves on the planet, and strives to provide high-quality products and honest customer service to all of its global partners and customers. DunAn is proud to serve the world’s leading HVAC manufacturers, lending our expertise and quality to bring trusted brands like Carrier, Johnson Controls (York), Goodman, Rheem, Lennox, General Electric, Tecumseh, Panasonic, Mitsubishi, Hitachi, LG and Samsung to new heights. DunAn Environment (Stock Code: 002011) is a subsidiary of DunAn Group, which is ranked in the top 500 public companies in China. DunAn Environment went public at the Shenzhen Stock Exchange in 2004, specializing in flow controls, heat transfer solutions and pressure vessels in HVAC/R industry