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What is SimpleSox?

A SimpleSox System is an adjustable fabric ductwork system assembled with pre-made components readily available for purchase online. The versatility of a SimpleSox System is unmatched as you can easily adjust both the volume and direction of air, as well as the location of where air will be dispersed, both during and after installation.
A SimpleSox System consists of up to 13 standard parts (see drawing below) available in five diameters (12”, 16”, 20”, 24”, and 28”) to deliver up to 6000 CFM per run. Each system has standard and optional components to meet your airflow and layout needs.
SimpleSox Systems are configurable up to 14 airflow volumes and a total of 63 combinations considering orifice size, orientation, and the number of orifices activated.
SimpleSox Systems are intended for simple, open ceiling applications using straight runs with or without 90 degree elbows or twists. They can be used as an alternative to metal ductwork and diffuser systems in traditional heating and ventilating applications, including some conditioned environments. SimpleSox are available in both Non-Porous and Porous fabric options. Non-Porous can be used as a replacement for single-wall metal ductwork. Porous can be used as a replacement for insulated metal ductwork for applications where condensation may be an issue. Typical applications are light industrial and retail, but can include many others.
The unique feature of a SimpleSox System is the Adjustable Air Outlet (AA0). Click on "AAO Feature" on the left to learn more.
Some newer options to choose from include:
  • A Twisty to twist around beams, pipes, and other obstacles in the SimpleSox path.
  • A Reducer to transition to a smaller diameter SimpleSox.
  • A Cross to direct air to areas perpendicular to the main run. The Cross can also be used as a Tee by simply adding an Endcap.


SimpleSox Systems are constructed using a medium weight, commercial grade permeable or non-permeable, white or silver fabric that is machine washable. Specifications include: Fire Retardant Polyester, Plain Weave, Coated; 5.5 oz/yd2; and Classified by Underwriters Laboratories in accordance with the requirements of: NFPA 90A, ICC/AC167, and UL 2518. Click link below for the SimpleSox Specification.

Other Features & Benefits

  • Modular, configurable components.
  • In stock and ready to ship.
  • Material costs are 25% less than metal.
  • Install time is 40–80% less than metal.
  • Much smaller space requirements for transporting and storage.
  • Easy installation using cable, glider attachments, and zippers.
  • Lightweight for easy handling.
  • Machine launderable.
  • Fabric is non-corrosive and will not dent.
  • AFD (fabric mesh damper), an optional feature for turbulent air.
  • Dual start zippers on AAOs and elbows.
To learn more about how to design a SimpleSox System, click on "Brochure," "How to Choose Components," and "Design Spreadsheet" on the left. All three links offer the tools you need to design your own System.