What does the digital airflow indicator panel display?

• A. The absolute airflow in feet per minute (FPM) on an alphanumeric display
• B. Live air velocity in knots on a digital gauge
• C. Relative airflow percentage on a bar graph
• D. Temperature and humidity readings

Answer: (A)

The digital airflow indicator panel shows the actual rate of air moving through the system, expressed in feet per minute and displayed as an alphanumeric readout. This gives a precise, quick reference to verify the ventilation is delivering the required airflow and to catch any drops or changes in performance. It isn’t meant to show air velocity in knots, which would be used for aircraft speed, nor is it a bar graph of relative percentage, which would be a qualitative indicator. It also doesn’t provide temperature or humidity readings, which are separate environmental measurements. So you get a clear, numeric readout of airflow in FPM for accurate monitoring and adjustments.