Which device would you use to measure gas pressure in an HVAC system?

The pressure gauge is the appropriate device to measure gas pressure in an HVAC system. This tool is specifically designed to provide a reading of the pressure of gases, which is crucial for ensuring that the system operates efficiently and safely. Accurate gas pressure measurement is vital for diagnosing issues, tuning the system for optimal performance, and adhering to safety protocols.

In HVAC applications, monitoring gas pressure helps in determining whether the system has adequate pressure levels for combustion in gas units or proper operation of refrigeration components. Using a pressure gauge allows technicians to quickly assess these levels, leading to timely maintenance and repairs, which ultimately contribute to the overall effectiveness and safety of the HVAC system.

The other options, while important in their respective functions, do not serve the purpose of measuring gas pressure. A thermostat regulates temperature, a flow meter measures the rate of fluid flow, and a filter is used to remove particulates from air or liquid streams. Each serves a distinct role in HVAC systems, but none can replace the specific function of a pressure gauge when it comes to monitoring gas pressure.