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Zhejiang Dunan Electro-Mechanical Technology Co., Ltd. is the wholly-owned subsidiary of Zhejiang Dunan Artificial Environmental Equipment Co., Ltd , listing company (stock title: Dunan Environment; stock code: 002011) specialized in producing various commercial and household central air-conditioner adopting electric refrigeration, and terminal equipments. It's a drafting organization of national standard for central air-conditioner, national key hi-tech enterprise, implementing enterprise of Torch plans & projects at national grade, Patented Model Enterprise of Zhejiang Province and Hi-tech Scientific R&D Center of first batch of Year 2002 in Zhejiang Province. It has passed ISO9001:2000 certification of international quality system, ISO14001 certification of environment management system, CCC certification and so on national authority certificate. Since the initial establishment, our company has invested a lot in importing first class technique and equipment from America, Japan and Italy, etc. It has set up a national grade whole performance testing line, certified by Quality Supervision and Inspection Center of National Compressor and Refrigerating Equipment, through cooperation with Hefei General Machinery Research Institute. An overall scientific researching, designing and inspecting organization is set up, including central air-conditioner research institute, product development and designing center, and product performance testing center. Among them, Dunan Central Air-conditioner Research Institute carries out scientific research and technical cooperation with Zhejiang University, and other famous universities, and has set up a post-doctoral workstation. Now DunAn E&M owns water cooled screw chiller, air cooled scroll chiller, water /ground source heat pump, rooftop units, air cooled packaged units, air conditioning terminal units and so on 10 series and over thousand specifications of products. In addition, we have developed and applied the hi-tech of intelligent control, energy-saving, environmental protection and remote supervision & control through network, etc. In the field of nuclear grade air conditioning units: we have designed and developed nuclear grade chillers, nuclear-grade surface cooler, nuclear-grade air valve, nuclear-grade fan and so on matching equipments, and becomes the first domestic nuclear-grade chilled water unit manufacturer to nuclear power station; in the line of communication: we designed and developed precise equipments room exclusively use air condoning units, base station energy-saving integrated air conditioning units, base station energy-saving intelligent ventilation air conditioner, and so on products aims at the energy ???saving transformation of equipments room and base station. DunAn E&M has become a big differentiated special air conditioner company based on commercial air conditioner and industrial special air conditioner oriented.