What is the primary function of a duct in utility services?

The primary function of a duct in utility services is to serve as a passageway for conveying air or gas. Ducts are critical components in heating, ventilation, and air conditioning (HVAC) systems, facilitating the distribution of conditioned air throughout a building. These air ducts allow for the efficient movement of air, helping to maintain desired indoor temperatures and air quality.

In HVAC systems, ducts are designed to transport heated or cooled air from the source, such as a furnace or air conditioner, to various rooms or spaces within a structure. This ensures that every area receives proper ventilation and temperature control, contributing to overall comfort and energy efficiency.

In contrast, storage spaces for HVAC equipment, types of insulation materials, or conduits for electrical wiring do not perform the same role as ducts. Each of those options serves specific functions that do not align with the duct's purpose of air or gas conveyance.