Identify a practical application for a digital manometer in HVAC.

A digital manometer is specifically designed to measure pressure differentials in various HVAC applications. In the context of ensuring proper airflow balance, measuring duct pressure becomes crucial. By using a digital manometer, a technician can precisely assess the static pressure within the ducts. This measurement helps determine if the airflow is evenly distributed throughout the system, which is essential for optimizing efficiency and comfort in heating and cooling applications.

When duct pressure is correctly measured, technicians can make necessary adjustments to improve airflow distribution, identify blockages, or evaluate the performance of fans and blowers. This practical application is vital for maintaining system balance and ensuring that each space within a building receives adequate air supply.

While the other options mention relevant HVAC practices, they do not directly relate to the primary function of a digital manometer. For example, calculating refrigerant flow rates typically requires specialized tools like flow meters, while monitoring energy consumption often involves energy management systems rather than pressure measurements. Testing insulation quality usually involves thermal imaging or other methods rather than pressure measurement techniques.