Why textile ducts?

Textile ducts are very well-suited for efficient, uniform, and draught-free distribution of fresh air without "dead zones".

Why textile ducts?

Read more about textile based ventilation

What is a KE-Low Impulse System?

KE Fibertec's textile based low impulse systems are woven from Trevira CS polyester yarn, and the textile surface acts as a fine mesh, allowing the supply of air to pass through the surface at a very low uniform discharge velocity which is normally less than 0.1 m/s.

The KE - Low Impulse textile duct is produced using round ducts ( Ø ) The KE - Interior textile duct is available either as half-round or quarter-round fabric ducts in a design adjustable to all types of rooms.

Because of the density differential, with the cooled air being heavier than the warmer air in the room, the room air is displaced below the duct while the supply air continues moving towards the floor. The warm air is driven up to high level where it will not cause discomfort.

The air movement in the room moves naturally, the air is driven by the difference in density, and the convection streams from heat-releasing activities and processes, hence the term "passive thermal displacement" is used.

High levels of heat gain from heat sources generate stronger convection currents, this results in the air rising faster and causes more entrainment of the air around the source. The result is stratification in the ventilated room, heat and pollution are drawn away from the occupied zone and extracted at ceiling level.

Low impulse textile duct systems are only suitable for cooling purposes or for distributing large volumes of isothermal air, as warm air will settle under the ceiling like a blanket. When this happens, a short circuit is created, and the room is not heated effectively.

Typical applications, Laboratories, Kitchens, Food Industry

Order our catalogue below to read more about the KE-Low Impulse System.

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Low impulse smoke simulation

The air distribution principle for horizontal low impulse systems is based on passive thermal displacement where the air is supplied at a lower temperature in relation to the air in the room.


  • Single Row Suspension

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  • Double Row Suspension "Safetrack"

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  • Triple Row Suspension "Safetrack"

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  • Single Row Suspension "Safetrack int-arch"

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  • Double Row Suspension "Safetrack ext-arch"

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  • Single Row Suspension "Safetrack 360°"

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  • Single Row Suspension Wire

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  • Double Row Suspension Wire

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  • D-Lite Alu

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  • D-Alu

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Safetrack Arches

Safetrack Dual Arch

Dual Arch mounting brackets feature the stability of double rails but at the same time are quick and easy to install. Large textile ducts will be firmly suspended both with and without the air turned on and installation time is reduced considerably as the ducts are mounted in a single ceiling rail. The frame system can be constructeed on the floor then lifted up to high level.

Safetrack Duct Arch

Duct Arch is a pre-bent aluminium rail mounted in hidden sewn-in pockets in the TBV ducts. The hidden Arches reduce sagging when the air is off to prevent snagging on other services. It also and prevent popping if no soft-start is used. The unique Safetrack is designed in a way so that the Arch brackets are easily clicked onto the ceiling rail without any tools.

Safe 360° Arch

The Safe 360° system consists of removable steel rings fitted every 1000 mm or 500 mm. The stainless steel rings are secured with velcro inside the ducts at 12, 3, 6 and 9 o'clock so they can easily be removed for washing. The ducts will keep looking inflated, this is our best solution if a soft start cannot be fitted.

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Curved textile ducts

We are able to offer curved textile ducts designed for a specific radius and with Safetrack rails that follow the shape of the duct. This product can be combined with both ordinary passive low impulse systems and with our hybrid solution in which the low impulse system is made with lasercut inject holes.

A good example is the system that KE Fibertec supplied to Algida Unilever's main office in Istanbul.

Mount Easy

For systems with difficult access, for instance in swimming pool areas where the TBV systems are suspended above the pool KE Fibertec offers a solutions with cord pull called Mount Easy. The Mount Easy system enables a single person to install textile ducts of up to 40 metres from one end. This system is also useful when rails need to be installed when the area is dity, the ducts can be installed at a later date when the area is clean.

Coloured suspension rails

Specific types of suspension systems are now also available in any given colour. All visible parts are powder coated in a high impact-resistant quality finish.

KE Fibertec recommends the D-Lite Alu® rail for D-shaped systems with dimensions up to D800 mm. 

The rail is produced very simply and facilitiates fitting on level false ceilings. This rail is used to provide a competitive edge as an alternative to D-shaped systems in premises where the finish and appearance have high priority. This type of rail is also suitable where access is difficult.

KE Fibertec recommends the D-Alu rail in premises where the finish and appearance have high priority, as well as for D-shaped ducts with bends and sharp elbows. The specially developed closing system is ideal for use in both horizontal and vertical systems. The D-Alu rail is suitable where access is difficult.

The wire suspension system is the most simple of the various suspension systems offered by KE Fibertec. Nowadays the wire solution is used almost exclusively for round ducts in particularly humid environments. Single wire suspension is used most often with duct dimensions under Ø630 mm. Double wire suspension is used most often with duct dimensions over Ø630 mm.

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