In HVAC systems, what is one function of pressure gauges?

In HVAC systems, pressure gauges serve a critical function by monitoring system pressure levels. This is essential because maintaining the correct pressure is crucial for the efficient operation of the HVAC system. Pressure gauges help technicians and system operators assess whether the system is functioning within its designed pressure range. If the pressure is too high or too low, it can lead to inefficiencies, system failure, or even damage to the equipment. By providing real-time feedback on pressure levels, these gauges play an important role in troubleshooting and maintaining overall system performance.

The other options do not align with the primary function of pressure gauges. While temperature variations are important in HVAC, they are measured with thermometers or temperature sensors, not pressure gauges. Additionally, flow direction is typically indicated by flow meters or specific directional indicators rather than pressure gauges. Lastly, filtering air contaminants is the role of air filters and not something pressure gauges are designed to do. Therefore, monitoring system pressure levels is the fundamental purpose of pressure gauges in HVAC systems.