FabricAir® VarioDuct™


  • High heating and cooling capacity
  • No compromise on comfort level switching from heating to cooling
  • Full flexibility when it comes to air volumes, air pressures and temperatures
  • Easy and fast installation
  • Elbows in custom angles
  • Concentric transitions
  • Color of the damper can match the fabric color
Product Capabilities
The FabricAir® VarioDuct™ provides different flow models for cooling and/or heating purposes. It is tailored with an internal membrane that separates the two airflows.
Depending on which flow pattern location is needed, a damper changes position and moves the internal membrane either up or down covering half of the duct.  
The upper and lower sections can even be designed with their own unique static pressure and air volume to meet the specific requirements and comfort levels of the application.
ΔT may vary from low to high between the two sections. This is customized using differing flow models, thus ensuring a high level of comfort regardless of which section is in use.
Product Features
The FabricAir® VarioDuct™ features an internal membrane to separate the two airflows for heating and/or cooling purposes. This membrane is kept in place by the static pressure, thus does not flutter, providing the perfect airflow for each purpose; heating or cooling.  
Connection between damper and membrane is one zipper away – fast and easy! The membrane solution is available for any length of round duct incl. horizontal bends and concentric transitions. The color of the damper can be matched to the fabric. 
The damper is operated manually or automatically with a motorized actuator, allowing the membrane to switch positions. The damper can be controlled using a simple room sensor or via the building’s BMS system.

Data sheet


Options Available


Male fitting to connecting ventilation system


Manual with a handle or automatic by actuator


Special colors are available. Specify in RAL code.

*The suspension for the damper is not included.   **** Default is without coloring.


Position on damper

3 or 9 o'clock


24V or 110V or 230V

Cord length

1m [3 ft 3 in]

Temperature range

From -30°C [-22°F] to 50°C [122°F]

Relative humidity range

0-95%, non-condensing


Temperature range

From -40°C [-40°F] to 140°C [284°F]

Relative humidity range





FabricAir® Trevira


FabricAir® Combi

Membrane and its color

The same as the duct



Type 1**


Type 2


Type 3**


Type 4


Type 5**


Type 6


Type 7


Type 8**


Type 13

** All-in-One optional.    *** As the damper is made from galvanized steel, we recommend galvanized or aluminum suspension solutions.