Which of the following materials is typically used in HVAC insulation?

Fiberglass is a widely used material for HVAC insulation due to its excellent thermal resistance properties, lightweight nature, and cost-effectiveness. It effectively reduces heat transfer, helping to maintain the desired temperatures within HVAC systems, which can enhance energy efficiency and reduce operating costs. Fiberglass insulation is available in various forms, including batts, rolls, and loose-fill, making it versatile for different applications, from ductwork to piping.

Additionally, fiberglass is non-combustible and resistant to moisture, preventing condensation and mold growth that could compromise the integrity of insulation over time. This material is also a good sound absorber, further contributing to a more comfortable indoor environment by reducing noise transmission through ducts and other HVAC components. These characteristics make fiberglass the material of choice in many HVAC insulation applications.