What are the two types of duct insulation typically used?

The two types of duct insulation typically used are internal acoustic insulation and external insulation. Internal acoustic insulation is designed to reduce sound transmission within the ductwork, which helps minimize noise that can travel through the HVAC system. This is particularly important in residential or commercial spaces where noise control is a priority.

External insulation, on the other hand, focuses on temperature regulation. It is applied to the exterior of the ductwork to prevent heat loss or gain, ensuring that the air being transported maintains its desired temperature as it moves through the system. This kind of insulation helps improve energy efficiency by reducing the workload on heating and cooling systems.

While other types of insulation may be effective in specific applications, the distinct roles of internal acoustic and external insulation make them the primary types used in duct insulation within HVAC systems. This differentiation is crucial for both performance and energy efficiency, aligning with industry standards and practices.