What is the primary purpose of velocity pressure measurement in duct systems?

Velocity pressure measurement in duct systems is primarily utilized to evaluate air movement. This involves measuring the speed at which air is moving through the ductwork, which is essential for determining if the ventilation system is operating effectively. By measuring velocity pressure, technicians can ascertain the flow rate of air, identify any potential issues with air distribution, and make informed decisions regarding modifications or maintenance needed to ensure optimal function of the HVAC system.

This measurement directly reflects the dynamics of air movement and is critical for balancing air distribution throughout the spaces served by the ducts. Understanding air movement aids in analyzing whether the system is delivering adequate airflow to meet design requirements and comfort levels.

Other related options, such as determining fan efficiency, assessing duct size, or calculating refrigerant flow, serve different primary functions within HVAC systems and are not the main focus of velocity pressure measurement in duct systems. This distinction highlights the specific role of velocity pressure in ensuring that air is moving appropriately to achieve desired indoor air quality and comfort.