KE Fibertec

Textile Based Ventilation

Low cost, low energy, clean indoor environments.

Textile Based Ventilation - TBV - Fabric Ducts

Air Solutions provides local Design, Design Consultancy and on site assistance to installers. Using KE Fibertec's CAD/CAM modelling software TBV Designer, our ducts will be designed perfectly to your project, including export into AutoCAD, Revit and MagiCAD. WinVent details every aspect of the system wether a simple straight run or complex bends, turns and transitions. The system is guaranteed to perform on the project as it does within WinVent. KE Fibertec's systems are recognised as the industry leader in laboritories and the food industry thanks to their superior HDC, High Dust holding Capacity material for low impulse systems.. Famous for condensate free swimming pools using DireJet nozzle systems and draft free office environments with laser cut orifices.

System Range

KE Fibertec develops and markets three main TBV product groups, which can all be supplied in three different geometries.

KE-Low Impulse

100% air through permiable material for low velocity solutions. Eg; Laboratories and cold working environments.


Hybrid permiable material and laser cut orifice. For comfort solutions. Eg; Offices, public spaces



Majority air through nozzles for precision throw. and even pressure within the system for low pressure energy efficicent systems.

KE Low Impulse Textile Based Ventilation

The KE - Low Impulse textile ducting is an ideal solution for the delivery and distribution of cooled air, particularly suitable for hygien, comfort and temperature control. 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 - Low Impulse textile ducting will distribute and filter cooled air completely without drafts. The air slowly diffuses through the permeable surface and the excellent air distribution ensures a good working environment free of drafts even in cold rooms.

Air flow is based on the displacement principle, in that cold air displaces warm air and convective currents over heat sources are very important. The system will only work if the fundamental physical laws are obeyed, so the system cannot be used for heating purposes. However, when sized properly it is possible to cool by up to 63 BTU / sqft floor area without drafts, and the system is condensation free even at a humidity rate over 90% RH.

Great care is taken when designing a system based on passive thermal displacement to take into account heat producing elements in the subject room.

The system is particularly well suited for the food industry, pharmaceutical industry, electronics industry and very relevant to applications that require high cooling and ventilation loads.

The specially designed KE-Trevira CS materials are woven in our our weaving mill and developed for long term durability. Even after repeated washing, permeability remains uniform with a maximum shrinkage rate of 0.5%.



Uses of KE-Low Impulse Textile Ventilation;.


• High cooling

• Fresh air supply

• Low air movement

• Easy to clean and maintain


Ideal solutions for;.


• Food industry

• Cold store

• Laboratory

• Make up air supply

KE Inject Fabric Systems

The key difference between the KE - Inject Fabric Ducting and KE - DireJet Fabric ducts is induction, ie the ability to entrain room air. The KE - Inject Fabric Ducting comprises groups of small holes in the textile, resulting in an induction of room air on a huge scale around the jet. This means that the velocity rate in the jet is reduced more quickly than for the KE - DireJet Fabric Ducts but the throw length and penetration length are also reduced.


The KE - Inject Fabric Ducting comprises small holes in coated, airtight material. The delivery of air through the holes causes induction of the room air on a large scale, resulting in a relatively rapid reduction in the air velocity rate in the jet compared to the KE - DireJet Fabric Ducts.

The Inject system is specially suitable for industrial premises with typical room height of 10 - 20 feet where the need is for different supply air temperatures, ie heating, cooling or just replacement air.

In order to achieve a uniform and optimum air distribution throughout the whole room, the entire length of the inject duct is used as one long diffuser ensuring that air delivery will not be limited to particular zones. This system will significantly increase the ability to induce and mix room air better than traditional ventilation systems, and without the associated draft issues.

With the introduction of KE laser cut hole technology, our systems are able to combine the advantages of a passive low impulse system more active by adding rows of orifice holes to divert the air away from the near zone right under the fabric duct. KE Fibertec has well documented measurements of throw lengths etc relating to specific patterns of hole design.



When to use KE-Inject Fabric;.


• Short to medium throw

• High levels of mixing

• Fresh air supply

• Low maintenance

• Visually appealing


Ideal solutions for;.


• Small Swimming Pool ductwork

• Low height storage areas

• Small industrial applications

• Production facilities

• Temporary Structures

KE Direjet Fabric Systems

The KE - DireJet Fabric Duct is made of a coated or permeable textile material with rows of conical nozzles for 100% active directional delivery. The conical nozzles limit the induction of room air around the individual air jet, whereby the velocity in the jet decreases relatively slowly compared to the KE - DireJet System. As a result of this, both the throw length and thermal penetration length are extended considerably for KE-DireJet Fabric Systems.


KE Fibertec is the only distributor of textile ducts that offers five different nozzle sizes Ø12, Ø18, Ø24, Ø48 and Ø60mm. The flexibility in the choice of nozzle size offers great benefits as the KE-DireJet Fabric Duct can then be used in virtually every type of premises that requires mixing ventilation, even in extremely large premises, such as high-bay warehouses or large sports arenas.

The nozzles can be supplied with nozzle plugs to block the airflow temporarily in certain zones. This is used most often in cases where the system's features need to be changed for a period of time, for instance, if the premises' use changes.

The conical nozzles are fitted in holes made of coated polyester fabric and are secured using a locking ring.The latest development of KE-DireJet Fabric Ductwork is called the KE-DireJet Vario. This is a multi-adjustable nozzle that allows the direction of the air jet to be freely adjusted up to 30 degrees in any direction relative to the nozzle's centreline.

Ducts are often used with different nozzle types and flow models in the same duct. This allows you to achieve the flow pattern and air intensity in the various zones exactly how you want. The conical nozzles are fitted in holes made of coated polyester fabric and are secured using a locking ring.



Using KE-DireJet Fabric Ductwork;.


• Long throw systems

• Suitable for large spaces

• High supply temperature heating

• Low maintenance

• Visually appealing


Ideal solutions for;.

• Swimming Pool ductwork

• Industrial Ductwork Applications

• Warehouse ductwork & Storage Facilities

• Sports & Leisure Facilities

• Public Places

Ø12mm Nozzle



The Ø12 mm nozzle is used where directional delivery is required in a room and comfort requirements are important. Each nozzle delivers 5 m3/h with a static pressure of 120 Pa. See datasheets 11 and 12 for further information.

Ø18mm Nozzle



The Ø18 mm nozzle is used where directional delivery is required and often in process-orientated solutions, in a room where relatively large throw lengths are required. Each nozzle delivers 11 m3/h with a static pressure of 120 Pa. See datasheets 11 and 13 for further information.

Ø24mm Nozzle



The Ø24 mm nozzle is used for directional delivery in a room with large throw lengths. Each nozzle delivers 20 m3/h with a static pressure of 120 Pa. See datasheets 11 and 14 for further information.


Ø48mm Nozzle



The Ø48 mm nozzle is used for directional delivery in a room with very large throw lengths. The flexible nozzle can be turned 30° in any direction around the nozzle’s centreline. Each nozzle delivers 81 m3/h with a static pressure of 120 Pa. See datasheets 15 and 16 for further information.

Ø60mm Nozzle



The Ø60 mm nozzle is made up of the bottom of the Ø48 mm nozzle and is used for directional delivery in rooms with very large throw lengths. Each nozzle delivers 139 m3/hwith a static pressure of 120 Pa. See datasheets 15 and 17 for further information.

Material dust holding capacity.


The surface structure of an HDC material compared to an LDC material. The HDC material has a huge surface and volume in relation to an LDC material, which is of great benefit to the dust holding capacity and therefore, the washing frequency.

No matter how well the air is pre-filtered, a certain amount of dust particles will always end up in the supply air. How frequently the textile ducting is washed therefore depends, to a large extent, on the fabric’s dust holding capacity. KE Fibertec classifies the materials into two material groups according to the fabric’s dust holding capacity. We therefore use the acronyms HDC for materials with a high dust holding capacity and LDC for materials with a low dust holding capacity.

Low Dust Capacity materials are woven of multifilament warp yarns (lengthwise), i.e. yarns that are made up of 128mm thin cut fibres. These fibres are plain and smooth with a small surface compared to that of the staple yarns. In weft direction (crosswise), the same staple yarns are used as for the HDC fabric, however, the weaving-method is a more simple cotton bond with a much smaller surface than that of the HDC fabric.

In practice there will be no difference in strength or in durability of the two fabrics. Neither in permeability accuracy nor shrinkage

The capability of the materials to carry dust is highly dependent on the structure of the weave. High Dust holding Capacity materials (HDC) are made of staple fibre yarns, i.e. yarns that are spun of 38 mm long thin fibres. The final yarn is made by twisting two yarns into one yarn that is used both in warp and weft direction (length- and crosswise of fabric). The result is a fabric that is capable of carrying a large amount of dust without blocking the air flow through the material. Such blocking would require washing of the textile duct to ensure the distribution of the calculated quantity of air at the calculated pressure loss.

KE Fibertec offers a variety of product types according to the relevant needs and type of installation. All low impulse systems and hybrid high impulse systems are basically dimensioned using materials with a high DHC, whereas we use materials with a lower DHC for very active systems (more than 30% of air through holes or nozzles). The reason for this is that the dust particles in these systems do not cause the same rise in pressure in the duct as most of the dust just penetrates the holes or nozzles.

KE Fibertec always carries out recommended tests on the dust holding capacity of textile materials. For instance, we have tested both HDC materials and LDC materials in accordance with EN 779 at the approved PALAS Institute in Germany. The results of these tests showed that the Dust Holding Capacity was up to 4 times higher for the HDC material compared to the LDC material.

GreenWeave is a woven material made exclusively for textile ducting. The unique and competitive features create a sustainable and energy efficient solution for textile based ventilation.








ZeroWeave is the right solution for applications to move large volumes of air over a long distance and still maintain optimum air mixing.


  • ZeroWeave is an air tight material so the filter efficiency is zero. All air is ditributed through the holes or nozzle
  • No PVC, halogens or other harmful substances. The material can be lasercut to improve the finished quality
  • Fire tested acc. to EN 1301 B-S1-d0 without any finishing treatment
  • No condensation issues when used in environments below 90% RH
  • No washing required in order to maintain functionality. Only for hygenic and aesthetic reasons








MultiWeave is a woven material made exclusively for textile ducting. The strong and competitively priced material makes it a good solution for industry and pool room applications.

An airtight, low-maintenance material with a wide range of application possibilities such as supermarkets, large sports arenas, high-bay industrial facilities and rooms with high dust generation or limited accessibility.









Washing Instructions

KE-Inject® System
( textile )

KE-Interior® and
KE-Laser / Interior Systems

KE-Direjet® System
( textile )