HVAC measurements are the various parameters that are used to measure the performance of a heating, ventilation, and air conditioning (HVAC) system. These measurements are used to determine the efficiency of the system, as well as to ensure that the system is operating correctly. Common HVAC measurements include air flow, temperature, humidity, and pressure. Air flow is measured by the amount of air that is moving through the system, while temperature is measured by the degree of heat in the air. Humidity is measured by the amount of moisture in the air, and pressure is measured by the amount of force that is being applied to the air. By measuring these parameters, it is possible to ensure that the system is operating correctly and efficiently. Additionally, these measurements can be used to identify potential problems with the system, such as a clogged filter or a faulty component.