Which fiberglass form is often used as flexible covering around HVAC ducts and pipes?

• A. Pre form
• B. Board
• C. Wrap
• D. Batt insulation

Answer: (C)

When insulating HVAC ducts and pipes, you need something that can conform to curved and irregular shapes. That’s why a flexible wrap made of fiberglass is used. Fiberglass wrap is designed to be pliable, so it can be wrapped smoothly around ducts and pipes of varying diameters and bends, creating a continuous insulating layer. It often comes with foil or paper facing that can act as a vapor barrier and is secured with tape or fasteners. Rigid forms like boards or pre-formed sections don’t adjust to curves, and batt insulation is meant for cavities in walls and ceilings rather than wrapping mechanical runs. So the flexible wrap is the best choice for covering HVAC ducts and pipes.