Glass wool fibers belonging to a category, is a synthetic inorganic fibers. Quartz sand, limestone, dolomite and other natural ore as the main raw material, with some soda, borax and other chemicals into the glass melt. In the molten state, by means of standard external blow thrown into floc fibrils, as the interchange between the fibers and they are intertwined central air conditioning production, showing many of the small gap. This gap can be regarded as void. Thus, glass wool can be as porous material with excellent thermal insulation, sound absorption performance. 2.2.2 Rockwool pipe system include central air conditioning refrigerant lines, condensate water pipe, back to the wind pipe, power line control lines. To the pipeline system is extremely important manufacturers of central air conditioning, air-conditioning effect in ensuring the premise, as far as possible with the decoration, to meet the needs of interior decoration. Refrigerant pipe and duct insulation machine needs central air supply duct, pipe fittings, valves and pipes in contact with the metal parts have to do to install central air-conditioning insulated to prevent condensation water produced; condensate piping material generally used PPR pipe, UPVC pipe, the proposed centralized discharge condensate drain should be a slope, aspect and drainage points. Central air-conditioning company, Xi'an Hao Electrical and Mechanical Services (certification), dry county central air conditioning provided by the Xi'an Hao Electrical and Mechanical Technology Limited. Xi'an Hao Electrical and Mechanical Technology Co., Ltd. (www.029hfkt.com/)(www.029hfkt.com) is Xi'an, central air conditioning leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum to meet customer needs. Xi'an Hao Electrical and Mechanical Services leadership with the staff warmly welcome all inquiries negotiations to create the Electrical and Mechanical Xi'an Hao better future.