Which term is used to measure airflow?

Which term is used to measure airflow?

• A. Natural Draft
• B. Mechanical Draft
• C. Megnehelic gauge
• D. Meters per second MPS

Answer: (D)

Airflow is measured by the speed at which air moves through the duct, which is velocity. The standard unit for this speed is meters per second. Measuring airflow this way gives you how quickly air is passing a point, and you can relate that velocity to flow rate (with duct area you can calculate volume per time, like CFM or L/s). The other terms don’t measure speed: natural draft and mechanical draft describe how air is moved, not how fast it moves, and a Magnehelic gauge measures pressure difference rather than airflow velocity directly. So meters per second is the appropriate unit for describing airflow speed.

Airflow is measured by the speed at which air moves through the duct, which is velocity. The standard unit for this speed is meters per second. Measuring airflow this way gives you how quickly air is passing a point, and you can relate that velocity to flow rate (with duct area you can calculate volume per time, like CFM or L/s). The other terms don’t measure speed: natural draft and mechanical draft describe how air is moved, not how fast it moves, and a Magnehelic gauge measures pressure difference rather than airflow velocity directly. So meters per second is the appropriate unit for describing airflow speed.