In HVAC terminology, what does "steam trap" refer to?

A steam trap is an essential component in steam heating systems. Its primary function is to remove condensate—liquid water that forms when steam cools—while preventing the escape of steam. This is critical for maintaining the efficiency of the system. The removal of condensate helps to avoid water hammer, ensuring a smoother flow in the pipes and preventing damage due to excess water buildup.

While the other options describe functions that exist in HVAC systems, they do not accurately encapsulate the main role of a steam trap. For instance, devices that release steam are part of overall thermal management, but they do not specifically focus on managing condensate as steam traps do. Similarly, pressure regulation and temperature monitoring involve different devices, such as pressure relief valves and thermostats, which serve distinct purposes from that of a steam trap.