AMCA/ASHRAE Flow Tunnels

AMCA/ASHRAE Air Flow Tunnels

Airflow Sciences' Air Flow Measurement Tunnel is a highly accurate, self-contained measurement system meeting AMCA/ASHRAE specifications and custom-built to meet your exact flow measurement needs.

custom air flow tunnel

Typical AFT-3000 flow tunnel with automation

What is a flow tunnel?

The Air Flow Tunnel allows for the generation of fan and blower performance curves as well as pressure drop curves in order to measure and improve flow resistance within ductwork, radiators and other system components. They are fully customizable to measure any desired range of air flow rates. Typical tunnels range from 50 to 12,000 CFM for fans and HVAC equipment, while smaller tunnels with range from 0.1 to 50 CFM are used for leakage testing or smaller products and filters. Very large tunnels, 10,000 to 100,000+ CFM are available for large fans and complete AHU testing. All systems target 2% or better accuracy.

Air Flow Tunnels are custom-built to meet customer specifications. Common Air Flow Tunnel models are shown below:

  • Model AFT-3 (0.15 to 3.0 CFM)
  • Model AFT-7.5 (0.4 to 7.5 CFM)
  • Model AFT-100 (5 to 100 CFM)
  • Model AFT-500 (10 to 500 CFM)
  • Model AFT-1500 (10 to 1500 CFM)
  • Model AFT-3000 (50 to 3000 CFM)
  • Model AFT-12000 (50 to 12000 CFM)
  • Custom (you name it, we'll build it)

Software / Data Logger

PC based software performs data logging for all flow tunnel components (fan, transducers, temperature), ambient conditions (pressure, temperature, humidity) and Unit Under Test (UUT) operating conditions (fan voltage, RPM, actuator motor voltage). Software features user input of test conditions and selection of nozzle. On-screen display of results during testing. Exports data for Excel spreadsheet import.

Performance and Operation

As air is moved through the chamber the pressure drop is measured across the nozzle plane. Expected accuracy is +/-2% of full scale for each nozzle, and typical accuracy of calibration results are better than 1% of the reading.

For more information, please review Air Flow Measurement Tunnel brochure or contact our team of engineers today.

Air Flow Tunnel
AMCA/ASHRAE Air Flow Tunnel

Automotive testing with typical AFT-100 (left) and typical AFT-1500 (right)

Learn more:

Visit our equipment-specific website, Airflow Sciences Equipment, for more info, videos, and blogs on Airflow Sciences' flow tunnels.

Watch ASC's AMCA-ASHRAE Air Flow Tunnel on YouTube.