HVAC Duct Insulation: Types, Applications, Advantages and Disadvantages

nexoradesign.net
Jul 20
2 min read

Ductwork is responsible for transporting conditioned air throughout a building. However, an uninsulated or incorrectly insulated duct can gain or lose heat, produce condensation, transmit noise and waste a considerable amount of energy.

Selecting duct insulation is therefore not simply a matter of choosing the thickest available material. The correct solution depends on several factors: (HVAC Duct Insulation: Types Applications Advantages and Disadvantages)

Duct location and surrounding conditions
Supply-air temperature
Ambient temperature and relative humidity
Fire and smoke performance
Acoustic requirements
Available installation space
Exposure to weather, moisture or mechanical damage
Required thermal resistance
Local authority and project specifications
Installation cost and expected service life

This article compares the principal insulation materials used for HVAC ductwork and explains where each one performs best.

1. Why Is Duct Insulation Required?

Thermal performance

Conditioned air can gain heat while passing through a hot ceiling void or lose heat while travelling through a cold space. Insulation reduces this unwanted heat transfer and helps the air reach the occupied area at the intended temperature.