Which tool is essential for measuring air pressure in HVAC commissioning?

In HVAC commissioning, measuring air pressure is critical for ensuring that systems are functioning correctly and efficiently. The manometer is the essential tool for this purpose, as it is specifically designed to measure the pressure of gases or liquids.

Manometers can be used to gauge the static pressure in ductwork, the differential pressure across filters, and other critical points in the HVAC system. This measurement is vital for evaluating system performance, diagnosing issues, and confirming that the system operates within the intended specifications.

Thermometers, while useful for measuring temperature, do not provide any information about air pressure. Similarly, barometers are generally used for measuring atmospheric pressure and are not suitable for the more localized measurements needed in an HVAC context. Voltmeters, on the other hand, measure electrical potential and are not related to air pressure at all. Therefore, in the context of HVAC commissioning, the manometer stands out as the indispensable tool for accurately measuring air pressure.