The central air-conditioning system, which is a large number of advanced equipment and corresponding equipment in various buildings, has become one of the important symbols of modern architecture technology. It is an indispensable infrastructure for modern architecture to create a comfortable and efficient work and environment.

The central air conditioning system has strict requirements for the selection of thermal insulation materials. The properties of thermal insulation materials directly affect the energy consumption, weight, fireproof performance, construction and installation conditions and construction cost of the HVAC system. Therefore, it is necessary to analyze the performance of the air conditioning thermal insulation material and make a reasonable choice.

With the increasing demand for thermal insulation materials, many manufacturers in China introduce advanced production technology and equipment from abroad to produce insulation materials. There are many kinds of thermal insulation materials, but their performances are different.

After so many years of development, the development of thermal insulation material has been from the initial asbestos, glass fiber to the present rock wool, rubber and plastic and so on, these each have their own characteristics. To correctly evaluate the performance of a thermal insulation material, we must have an index that can fully reflect the performance of thermal insulation materials. The performance indexes of thermal insulation materials are approximately as follows: thermal conductivity, density, water absorption, moisture permeability coefficient, fire resistance, sound absorption coefficient, chemical resistance, aging resistance, dimensional stability and so on. In the use of air conditioning system, we can see that the thermal conductivity, water absorption and moisture permeability coefficient are important performance indicators of insulation materials. It is especially important for air conditioning system equipment and pipeline insulation, because the surface temperature is generally below the air leakage. If the treatment is not good, it may be inflow or dampened, causing the thermal insulation performance to decrease, destroying the heat preservation and energy saving effect, and may cause the external wall condensation. Besides, the fire resistance of thermal insulation materials is also an important parameter for selecting insulation materials. Fire caused by poor thermal insulation materials is often seen, so the fire resistance of insulation materials is more and more important.