Phenolic Foam products for the closed pores of rigid insulation material, flame resistance has central air conditioning installation, fire burn, the surface was only carbonization central air conditioning, it does not melt drip central air-conditioning manufacturers, not broken, the same type, no significant contraction, do not emit toxic gases; a low water absorption, excellent water moisture barrier; low thermal conductivity; the construction is simple, the product of a hard material. Easy to cut, install, such as the use of the outer layer of aluminum foil folder tendons strengthen armor, can no external metal hard protective shell, the overall cost savings investment. 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 central air-conditioning company, 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, 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 central air-conditioning company | Xi'an Hao Electrical and Mechanical Services (certified) | Foping central air conditioning provided by the Xi'an-ho, the 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.