Which of the following is one type of HVAC metering device?

A flow meter is indeed a type of HVAC metering device, as it specifically measures the flow rate of fluids, such as water or refrigerant, within the system. Understanding the flow rates is critical for maintaining system efficiency and ensuring that all components receive the appropriate amount of fluid needed for optimal performance. Proper flow measurement helps in diagnosing issues, optimizing energy use, and verifying system design.

In contrast, a thermostat is primarily a control device that regulates the temperature within a space by turning the HVAC equipment on or off. A condenser and a compressor are both essential mechanical components of an HVAC system but serve different functions; the condenser releases heat from the refrigerant, while the compressor circulates and compresses refrigerant gas. Thus, while all these options play important roles within an HVAC system, only the flow meter serves as a dedicated metering device for assessing fluid dynamics.