What determines the selection of a duct material?

The selection of duct material is primarily influenced by thermal conductivity and insulation properties because these factors directly affect the efficiency and performance of the HVAC system. Materials with appropriate thermal conductivity can help maintain the desired air temperature within the duct, minimizing energy loss. Insulation properties are equally crucial as they help to prevent heat gain or loss, ensuring that the air delivered to spaces is conditioned efficiently.

Additionally, the right combination of thermal properties and insulation can improve the overall comfort of the building occupants and contribute to energy savings. For example, if a duct material has high thermal conductivity but lacks adequate insulation, it may lead to significant energy losses, compromising the system's effectiveness.

While cost and availability, color, and ease of installation are important considerations when selecting duct materials, they do not have as immediate and profound a impact on the operational efficiency of the HVAC system as thermal conductivity and insulation properties. Thus, these latter characteristics are critical in choosing the material best suited for a specific application.