Control pressure within your DuctSox! DuctSox engineers introduce the Adjustable Flow DeviceTM (AFD), the first in-duct system that regulates fabric duct airflow and static pressure. The patented AFD is a polyester mesh cone with a factory set or field adjustable hemmed drawstring aperture for air balancing all models of DuctSox fabric air dispersion models.


Specifically, the AFD offers:

  • Ajustable flow restriction to adjust for static regain
  • Reduced in-duct turbulence at outlets or at fittings.
  • Staged inflation and reduces abrupt start-ups.
  • Balanced airflow and static pressure in trunk lines and branch ducts.
  • Reduced maintenance requirements of static flow straightening devices.

This product may be covered by one or more of the following patents:
656430, 6558250, 5769708, 6425417, 6280320, 5961044, 5655963

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