What is the purpose of a duct insulation blanket?

The purpose of a duct insulation blanket is primarily to minimize heat gain or loss from ducts. When air travels through ductwork, it can pick up or lose heat to the surrounding environment, particularly if the ducts are located in unconditioned spaces such as attics or crawl spaces. Insulating the ducts helps maintain the temperature of the air inside, thus ensuring that heating and cooling systems operate more efficiently.

By reducing the transfer of heat between the air within the ducts and the surrounding environment, insulation blankets help to improve energy efficiency and maintain consistent indoor temperatures. This, in turn, can lead to lower energy costs and a more comfortable environment within the conditioned spaces of a building.

While increasing airflow, reducing duct size, and addressing duct joints are important aspects of ductwork design and installation, they do not represent the primary function of an insulation blanket.