What does a supply register do in HVAC systems?

A supply register is a critical component in HVAC systems, responsible for distributing conditioned air—either heated or cooled—into the rooms of a building from the ductwork. Once the air has been treated by the HVAC unit, it travels through the ductwork and arrives at the supply register, where it is released into the living space. This proper distribution helps maintain comfort by ensuring that each room receives an adequate supply of air to achieve the desired temperature.

The design of the supply register also allows for the regulation of airflow into the rooms. Many registers have adjustable louvers or dampers that enable users to control the direction and volume of air being released, which can enhance a building’s energy efficiency and comfort levels. Thus, the primary function of a supply register is centered around air distribution, making this answer the best choice in describing its role in an HVAC system.