70,000 CFM AMCA 270 Air Flow Tunnel
Airflow Sciences recently designed and constructed the first certified AMCA 270 flow tunnel ever built. This flow tunnel (also called a test chamber) is rated at 70,000 CFM with a static pressure up to 12 inches of water and has an overall size of 12'x12'x30'. Key features include:
- Fully automated testing to determine fan pressure vs. flow rate (P-Q curves)
- Versatile operation; can test fans at both positive and negative pressure (the AMCA “Figure 12” or “Figure 15” arrangements)
- Robotic actuators allow any of the 16 flow nozzles to be open/closed automatically, allowing for flow rates ranging from 2,000 to 70,000 CFM
- Measurement of fan power, amps, and speed
- Automated emergency stop of system to avoid over-pressure
Q-PAC ACMA 270 flow tunnel, 70,000 CFM capacity, commissioned February 2026
According to AMCA personnel, the Airflow Sciences tunnel is the very first large flow tunnel in the world to be built and commissioned to meet the AMCA 270 standard for fan array testing. The tunnel, located at the Q-PAC headquarters in Elkton, Florida, has been operational since February 2026. Q-PAC, a manufacturer of fan arrays for the HVAC industry, uses this tunnel for product performance certification and R&D of new fan systems.
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Photos from the construction of the AMCA 270 flow tunnel
The AMCA 270 flow tunnel was designed using the Azore CFD software.