What is the maximum temperature for unfaced flexible fiberglass duct insulation?

The maximum temperature for unfaced flexible fiberglass duct insulation is indeed 350°F. This type of insulation is designed to withstand high temperatures typically encountered in HVAC systems, making it suitable for use in various applications where heat resistance is crucial.

Fiberglass insulation consists of fine glass fibers that are inherently non-combustible, allowing it to perform effectively in environments with elevated temperatures. The 350°F threshold is an important specification because exceeding this temperature could compromise the integrity of the insulation, leading to potential failure in thermal performance, degradation of material, or even increased risks of damage to the ductwork.

Understanding this temperature rating helps in selecting the right insulation type for specific environments and ensures adherence to safety and performance standards in HVAC applications.