According to the heating and ventilation design specifications and the national civil building technical measures, the air ducts that need to be insulated include air conditioning air supply ducts, air conditioning fresh air ducts and other air ducts that need to be cooled and heat treated. Ducts entering the air conditioning area need to be insulated. In addition, the fire exhaust duct in the ceiling must be insulated with non-combustible materials.

Which ducts need insulation? What are the appropriate pipe insulation materials?

1. why air ducts need insulation

The treated air should be distributed throughout the building in an energy-efficient manner, with as little heat or cold loss as possible. If the temperature of the outer or inner surface of the duct is lower than the dew point, the air conditioning unit, especially the outdoor air and exhaust pipe, must also be protected to prevent condensation. If condensation water is formed on the insulation layer, considerable costs will be incurred; not only must the damage be repaired, but subsequent costs may also be incurred due to water damage to the ceiling, for example. In addition, the noise of the installation should be reduced and the pipeline should be acoustically decoupled.

Which duct insulation should be used to isolate the air duct depends on the function of the duct (outdoor, supply, outlet, or exhaust duct), its location inside or outside the building, and the temperature difference between the air in the duct and the outside air in the immediate environment. In general, the entire surface of outdoor, supply and exhaust ducts should be insulated along the entire length of the duct. Exhaust ducts should also be insulated-inside the building to provide noise control and outside the building to prevent condensation.

Which ducts need insulation? What are the appropriate pipe insulation materials?

2. pipe insulation material suitable for air duct

Because the individual parts of the duct are relatively long, and the shape is cylindrical and cylindrical, and there are elbows, this means that the pipe insulation material must be soft or elastic. This requirement limits the choice of insulation materials to rock wool, glass wool and rubber.

For the cold of the air duct, rubber and plastic are more advantageous than rock wool and glass wool. The reason is that rubber and plastic are composed of closed-cell, homogeneous and highly flexible materials with smooth surface. The closed-cell structure ensures a high resistance to water vapor transport and absorption of moisture from the ambient air or rain in the case of outdoor installations. The uniform three-dimensional connection structure can ensure that the insulation thickness, heat and other properties of the insulation are maintained for a long time. It can also prevent the air from being polluted by insulation materials, fibers, dust, microorganisms or other elements that may cause air pollution. Due to its high flexibility, the material can be neatly installed. Flexible insulation materials can be used well even in complex-shaped installations and difficult conditions on construction sites. The smooth surface of the elastomer material with a closed cell structure can be kept dust-free and clean. Compared with the open hole and fiber rock wool, the growth environment of microorganisms is much worse. In the room, the rubber and plastic insulation material can be installed on the air pipe. No additional coating or covering.

Which ducts need insulation? What are the appropriate pipe insulation materials?

For applications requiring laminated insulation for appearance or cleaning purposes, elastic insulation with an aluminum face is a suitable choice. These insulation boards, such as rubber insulation boards manufactured, are equipped with aluminum finishes, which are relatively thin. As long as the risk of surface damage by mechanical impact is not increased during maintenance work, these products will definitely bring benefits. They can be installed quickly and easily, meet aesthetic requirements due to attractive silver finishes, and are easy to clean.