The benefits of insulation duct are wide-ranging and can contribute to improved indoor comfort, a more efficient HVAC system and a healthier home or workplace. Ultimately, investing in air-conditioning and ventilation duct insulation will reduce energy costs and save you money while helping to lower greenhouse gas emissions.
Duct insulation is typically specified for both supply (hot) and return (cold) ducts to limit heat loss or gain, prevent condensation on the surface of the duct, and to comply with various building energy codes and standards, including ASHRAE Standard 90.1, the International Energy Conservation Code (IECC), and California Title 24. Insulation is also often required on cooling ducts that pass through spaces where the dew point temperature will exceed the supply air temperature, in order to control surface condensation and maintain an acceptable humidity level for building occupants.
There are a variety of materials used to insulate ducts, depending on your project requirements and budget. The most popular option is fiberglass insulation, which can be found in flexible duct wraps and rigid insulation board. This type of insulation is commonly used in residential and commercial buildings, and it is available in a range of thicknesses and R-values.
Other options for insulating ductwork include polyethylene and rockwool. These products require professional installation, due to their weather resistance and unique characteristics. To ensure that your duct insulation is working properly, be sure to check it regularly for leaks and apply an appropriate amount of aluminum foil duct tape or mastic duct sealant. If you do find a leak, it is best to replace the section of ductwork with damaged insulation or a new insulated segment. insulation duct