Types of Air Conditioning Insulation

Air conditioning system performance depends on insulation. What kinds of insulation are often utilized in air conditioning systems, then?

Insulation was necessary for an air conditioning system to attain maximum efficiency and minimize energy losses. Additionally, insulation keeps moisture off of air conditioner bodies and tubing.

Additionally, air conditioners and mechanical rooms are soundproofed using insulation. The strength of thermal insulation is determined by the thickness and density of the insulation. The quality of the insulation increases with thickness. You need to keep these tips in mind before insulation installation.

Likewise, better insulation results from larger densities. Cost is a significant consideration when selecting insulation, though. Therefore, the best insulation is that which is applied properly.

Closed cells 

Copper drain pipes and air conditioning refrigerant pipes are frequently insulated with closed-cell materials. Closed-cell insulation was also frequently utilized for the interior pipes and bodies of air conditioners and chillers.

Closed-cell insulations have a smoother surface and are often black. They are squishy, like sponges. In the air conditioning sector, the term “closed-cell” is not as often used. Within the air conditioning business, closed-cell insulation is frequently referred to by its brand name.

The condensate water drain pipe and the refrigerant pipe in these air conditioning systems are made of copper. Due to their low temperatures, both pipes need to be insulated to avoid condensation and the development of water droplets.


Chilled water pipes in air conditioning systems are frequently insulated using polyurethane (PU) materials. The panel of air handling units (AHUs) also contains PU insulation. In certain situations, PU insulation is sprayed onto concrete slabs to insulate the substantially air-conditioned level above from the normally room-temperature floor below. For chilled water pipelines, PU insulation is often pre-insulated. Because it is more difficult and expensive to insulate on-site, chilled water pipes are often pre-insulated at the manufacturer.


The air conditioning system’s ductwork is insulated with fiberglass. Fiberglass is usually utilized as insulation for flexible ducts in air conditioning systems. Fiberglass insulation is often used to insulate rigid air conditioning ducts.

To protect and confine the fiberglass, aluminum foil is frequently applied to the exterior of fiberglass insulations. When placing fiberglass insulation onto stiff metal ducts, adhesives or glues are needed. Rather than on-site, flexible ducts are often pre-insulated at the factory. However, the fiberglass insulation for rigid ducts is often wrapped on the spot. Because of the aluminum foil, rigid ducts with fiberglass insulation are frequently glossy and wrinkled. 


In air conditioning systems, polyethylene (PE) insulation is frequently utilized for the rigid duct. PE insulations are present on the exterior of several air conditioner models, including ceiling cassettes and fan coil units. One type of closed-cell insulation is PE insulation. PE insulations, however, are frequently gray in hue. The majority of PE insulation is supplied in rolls, which duct contractors must cut to the precise size needed for their applications. When insulating stiff ducts with PE, insulation glue is also required. PE insulation is often applied to rigid ducts before lifting and hanging. 


Rockwool is used as insulation for the walls of the mechanical chambers of air conditioners. They are used as insulation to keep the room quieter during air conditioning periods. In reality, Rockwool is the brand name of a company. The technical name for the insulating material stated above is stone wool. Stone wool is produced by a company named Rockwool. Because it’s so common, people call the insulating material “rock wool” instead of “stone wool.”


Heating and cooling systems’ overall energy efficiency is greatly influenced by HVAC insulation. HVAC insulation assists cut energy expenses and carbon emissions by lowering the amount of energy needed to maintain acceptable temperatures. By lowering the quantity of air that leaks from ducts and other components, proper insulation can also enhance the quality of the air indoors.