What is the main purpose of HVAC duct insulation?

The main purpose of HVAC duct insulation is to reduce energy loss and maintain temperature in the ductwork. This insulation creates a thermal barrier, which minimizes heat transfer between the conditioned air inside the ducts and the surrounding environment. If the ducts are uninsulated, significant energy is wasted as the temperature of the air fluctuates due to external conditions, leading to higher energy costs and reduced efficiency of the HVAC system.

Insulating the ducts helps to keep the air at the desired temperature, whether it is heated or cooled, ensuring that the HVAC system operates more efficiently. As the air travels through the insulated ducts, it retains its temperature better, ultimately contributing to energy savings and improved comfort levels within the living spaces or light commercial areas being served by the system.