How is flexible fiberglass duct insulation generally used in commercial settings?

Flexible fiberglass duct insulation is primarily designed for use in concealed applications within commercial settings. This type of insulation is ideal for wrapping air ducts and providing thermal insulation and condensation control, particularly in areas that are not readily visible, such as within walls or ceilings. By insulating the ducts, it helps maintain the desired temperature of the air being transported, improving energy efficiency in HVAC systems.

In addition to its thermal properties, this insulation can also contribute to controlling noise transmission, but its primary use remains focused on concealed areas where it can effectively manage heat loss and moisture. The other choices do not accurately represent the main applications of flexible fiberglass duct insulation, as it is not typically used for exposed surfaces, soundproofing may not be its primary function, and decorative insulation is not part of its intended application.