Jet Fan Airflow Verification Test

What this test verifies

Commissioning test used to verify that a jet fan achieves the target airflow rate under expected operating conditions.

Why it matters

Confirms that ventilation performance matches design intent and that the fan contributes correctly to smoke control or parking ventilation strategies.

Typical commissioning stage

Typical stage

Measurement method

• Run the jet fan at the specified operating mode and document ambient conditions.
• Measure airflow or velocity using the approved field method for the project.
• Compare measured values with design airflow, fan curve data, and acceptance criteria.
• Record fan ID, operating mode, readings, observations, and evidence photos.

Acceptance criteria

• Measured airflow should align with the design target within the project tolerance.
• Readings should remain stable and repeatable across repeated measurements.
• Large deviations require review of installation, rotation direction, obstructions, or power supply conditions.

Commissioning notes

Jet fan airflow verification is a practical commissioning step used to prove that the installed fan is delivering the air movement expected by the design. In car park ventilation, tunnel ventilation, and smoke control applications, the difference between nominal fan performance and installed performance matters because airflow directly affects dilution, extraction strategy, and emergency behavior.

In real workflows, engineers execute this test after mechanical installation, rotation checks, and basic electrical verification. The objective is not only to confirm that the fan runs, but that it delivers enough airflow under the actual system conditions present on site.

When airflow is below target, the root cause can come from incorrect rotation, unexpected pressure losses, obstructions, control settings, or supply issues. Capturing these results inside a commissioning platform is valuable because it links the measured performance to the asset, the operating condition, and the acceptance criteria used for handover.

FAQ

Why is airflow verification important if the fan already runs?

Because commissioning must confirm performance, not just operation. A fan can run normally and still fail to deliver the required airflow under site conditions.

What should be recorded with a jet fan airflow test?

Fan ID, mode of operation, measured airflow or velocity, ambient conditions, comparison against design values, and any observed restrictions or anomalies.