Possibilities, details, specialties


We offer a solution for every situation. Everything is tested by our qualified developers in a modern testing chamber. All products are custom-made and we are ready to meet your specific requirements for specific equipment or designs which are not listed here. Feel free to contact us.

For complete information, please download our Technical data.

1. Products for special use

1.1. Fabric Tiles SquAireTex

Whole diffusers, with the exception of the aluminium frame, are made of NMS fabric. The upper part for connection to the air supply may be manufactured insulated by non-woven fabric The sewn-in perforated interlayer guarantees even distribution of the air flow. Thanks to the very low weight, the installation consists only of insertion to the grid of the false ceiling. Fixation to the ceiling is not necessary. The upper and bottom part are connected by a zipper; the bottom part is attached to the frame by Velcro fasteners. This allows easy disassembly and the parts then can be perfectly cleaned by washing. Diffusers can be supplied in any of the 9 colors or their combinations (different color of channeling pockets and of the basic fabric), or in special colors. Upon request we can manufacture any dimension. We distinguish 3 basic types based on the achieved air flow.




Channeling pockets create a swirling air flow that stays under the ceiling.

Fabric ducting - Air duct squairetex swirl



The selected channeling pockets direct the air flow to one or more directions. The following options are available:

Fabric ducting - Air duct squairetex flow


Air is distributed by microperforation located evenly along the outlet surface.

Fabric ducting - Air duct squairetex perfo


1.2. Membrane Diffuser – Diffuser for two different supply air modes


This combines two types of diffuser into one. The membrane flap is a lightweight non permeable material sewn all along the duct length.  The membrane is attached to a two position motor.  In heating mode the motor moves the membrane to cover the cooling diffusers located at the top of the duct, the supply air exits the heating perforations on the bottom of the duct. In cooling mode the motor moves the membrane to cover the heating perforations at the bottom of the duct and the cool supply air leaves the perforations at the top of the duct.  The membrane allows two totally different diffusion styles in one duct.

Heating Cooling

Fabric ducting - Flexible ducting membrane


1.3. Lantern with Membrane – Large volume diffuser

Fabric ducting - Flexible ducting lantern with membraneOriginal inside construction based on double walls and impermeable membrane allows switching direction of airflow. Air can be supplied either horizontally into all sides or vertically downwards, in both cases through perforated fabric. Switching can be controlled by servomotor or manually. Beside stainless steel wire of the switching flap all the rest is made of fabrics and can be cleaned in washing machine. The diffuser is very light and its installation requires fixing to air supply only.

1.4. Negative Pressure (Extract) Ducting – Fabric Ducting for removing air

Fabric ducting - Flexible ducting negative pressureWe supply these only in square or triangular cross-sections. Because taught fabric is essential for extract ducting we tension the walls using a combination of suspension profiles, tensioning bolts and threaded bar. Air is drawn into the duct through perforations that can be positioned on any side and anywhere along the length of the duct. To ensure equal extract rates we can adjust the perforation diameters or the gaps between the perforations progressively along the duct. We anticipate our negative pressure ducts will be used where regular and/or thorough cleaning is required. Negative pressure fabric ducting is easily disassembled from the suspension system and unzipped into smaller washable parts. If the NMI material is used (containing a silver nanolayer), the ducting is antibacterial.



1.5. Defrost Damper – Faster and more efficient cooler defrosting


Fabric ducting - Flexible ducting defrost damper

The Defrost Damper (DeDa) collapses over the evaporator fan face, blocking off the front of the cooler, this stops unwanted fan rotation and speeds up the process of defrosting.  Made of NLW fabric, which ensures proper coverage of the cooler and has a hydrophobic treatment to prevent frosting.




1.6. Insulated Ducting – Thermal insulation

Used for decreasing temperature loss during transfer of conditioned air to the diffusers. A 30 mm thick, loose fibre, insulating polyester material (classification of fire resistance B-s2,d0 according to EN 13501) is sewn between two layers of fabric ducting material. All of our fabric ducting materials are available for use as the outer layer of the insulated duct allowing an easy match with other parts of the system. The manufacturing process compresses the original 30 mm loose insulation layer by 20 mm, reducing the finished product wall thickness. The maximum duct heat transfer coefficient is 1.8 W/m2/K. Insulated duct is manufactured as standard in 2000 mm zipped lengths and starts from Ø250 mm upwards. There is one tyre every 1 m. Insulated ducting also acts as an excellent noise dampener, absorbing and reducing in duct noise vibration, contact us for specific details.


1.7. Fabric Noise Attenuator – QuieTex –

We use 100 mm thick rock wool with aluminium foil to manufacture the fabric noise attenuator, which is covered on both sides with fabric. Greater damping is achieved using microperforated fabric inside.







1.7. Double Ducting – Prevention of condensation

Fabric ducting - Flexible ducting double ductingCondensation is mostly prevented by the use of double ducting. The interlayer is maintained in the correct position by a negligible flow of air (about 1 ‰ of the ducting flow). The heat transfer coefficient reaches up to 3.5 W/m2/K.



1.8. Antistatic Design – Removal of electrical energy build up

Fabric ducting - Air duct antistaticAntistatic design is intended for rooms, where a build up or uncontrolled discharge of static electricity must be avoided.








1.9. Fabric Shutter – Duct closing

Fabric ducting - Air duct shutterFabric shutter closes whole cross-section of diffuser or ducting and avoids air distribution or air transport into area behind its location. It is made of fabric with removable inside metal construction of a thin rod. The internal conical membrane closes the cross-section with supporting fabric grill or leaves it open. It can be operated manually or by servomotor.


1.10. Combined half-round section – High flow rate at low diffuser height

Fabric ducting - Air duct combined sectionThis is a combination of several half-round diffusers sewn together side-by-side. It enables higher air volumes with a relatively small duct height.





2. Solutions for long airflow distance

2.1. Small Nozzles – For directed air patterns and long airflow distance


Fabric ducting - Air duct small nozzlesSmall nozzles allow directed air patterns. Airflow is extended by circa 25 % in comparison to standard perforations and deflection minimized. The small nozzles exist in three diameters 20, 30 and 40 mm and in two variants, industrial and premium.





2.2. Big Nozzles – For Maximum airthrow distances

{popis}Our big nozzles (larger diameter) allow the longest airthrow distances. Range can exceed 20m depending upon static pressure and temperature difference. Nozzles can be fixed, adjustable or directed. Each of the nozzles has a very similar visual design; the adjustable nozzle may be directed as desired up to ± 45° using four belts which are hidden beneath an aesthetic fabric hem. An adjustable damper is sewn into every nozzle to allow variable flows.


3. Products with adjustable parameters

3.1. Adjustable Length and Arch – Possibility to change length and angle during installation

Fabric ducting - Air duct adjustable lenghtEight adjustable tie belts are sewn along the length of the circular duct. By adjusting (tightening or loosening) all or some of the eight belts, we can manually adjust the duct length or angle to suit the installation requirements.







3.2. Closable Nozzles – Regulation of air flow

Small nozzles can be blanked off by a band of perforated fabric placed behind the nozzles. The band moves between two fabric layers and opens or closes the nozzles. The required positioning is retained using velcro. If the nozzle is only partially opened, the flow is unstable and can change direction. The number of nozzles controlled by a fabric band is optional.





3.3. Adjustable Perforation – Setting airflow

Fabric ducting - Air duct adjustable perforationOur original innovation allows for manual adjustment of the diffuser hole size and airflow. The pictures below describe the operation – actual diffuser sizes and hole patterns are completely variable depending upon the project requirements.  The chosen position is retained using velcro.






3.5. Air Diffuser Lantern – Simple configuration and direction of air flow

Fabric ducting - Air diffuser lanternOur Lantern diffuser is designed to distribute air at high level, most often from units installed on the roof. It may only be installed in a vertical position. The air is blown horizontally in one to six directions. Vertical sliding strips are used to regulate the flow rate. For more information download brochure,






4. Solutions of problems with air flows

4.1. Equalisers – Airflow turbulence reduction

Fabric ducting - Air duct equaliserEqualisers are used downstream of the supply fan or inlet spigot. Their function is to reduce air turbulence and duct movement, however their use must be planned as they increase pressure drop.


Example of equalizer (EQ)




4.2. Pockets  – Solution for deflection of flows from perforation


Fabric ducting - Air duct pocketsFabric pockets are designed to remove the deflection of air leaving from the perforation. The solution is based on interaction of two air flows of similar momentum. Discharge from the last hole in the row is directed at a certain angle using a fabric pocket and balances the air deflection from perforation. Leaflet







4.3. Damper – Equalising static pressure within a duct

Fabric ducting - Air duct damperThe Damper is a short cone made of perforated fabric.The inlet of the damper is normal duct diameter whilst the outlet can be adjusted to a smaller diameter, by use of an adjustable belt. Maximum opening of the damper outlet results in zero pressure loss, whilst fully closing the outlet provides the highest local pressure drop. The damper setting can be adjusted at any time by opening a zip on the duct circumference. By Installing a damper part way along the duct one can equalise the static pressure within the duct and therefore the air flowing from each point along the duct. We also use dampers to provide flow control through Fabric Nozzles and outlet spigots to other parts of a system.



4.4. Diffuser for Intensive Cooling – For cooling with a high temperature difference


Fabric ducting intensive coolingFor cooling applications with a ∆t ≥ 6° k we recommend using horizontal air patterns from the Fabric Duct. This can be achieved by placing the micro-perforations in a band on either side of the duct at 90° and 270°. The horizontal airflow pattern must achieve a specific speed in order to prevent premature downward deflection. With sufficient outlet speed (provided by static pressure) it is possible to introduce 1 kW of cooling capacity per 1 m duct length, whilst maintaining a velocity below 0,2 m/s in the occupied zone. The air flow patterns are detailed in the illustrations below, please contact our authorized representatives for specific applications




4.5. Anti-deflector – Prevents the deflection of airflow (micro-perforation)

Fabric ducting - Air duct antideflectorAnti-deflector prevents the deflection of airflow from fabrics micro-perforated with holes larger than the thickness of the fabric. It is made of a fine mesh and covers the diffuser from inside. Our calculation software recommends its use whenever deflection could occur.






4.6. Beat Absorber – Elimination of Airflow impact on diffuser’s end

Fabric ducting - Air duct beat absorberThe Beat Absorber is composed of three connected truncated fabric cones which eliminate the sudden impact of the supply air on the end of the Fabric Diffuser upon unregulated start up.  This is available in new ducts and can also be retrofitted into existing systems.




5. Appearance improvement

5.1. Tensioner in the profile – Straightening of small wrinkles

Fabric ducting - Air duct tensioner profile

Screw tensioners slide into the profile are used to remove wrinkles and creases in the fabric.  The flexibility of the fabric allows it to stretch by up to 0.5 %. Pre-stretched diffusers are therefore manufactured 0.5 % shorter than specified and the true length is achieved when tensioning. The installation procedure is specified in the assembly instructions included in all deliveries.





5.2. End Tensioning – Stretches the whole length of the diffuser

Fabric ducting - Flexible duct tensioner 1

Fabric ducting - Flexible duct tensioner 2

5.3. End Support – Improved shape of blank end

A metal spring wire tensions the plastic insert in the blank end improving the look of the end of the diffuser.








5.3. Arcs – Prevents sagging of the diffuser without air supply

Fabric ducting - Flexible duct arcs with air

Used for improving uninflated diffuser shapes. The ends of the Arcs are inserted into pockets sewn on to the internal ducting wall, they also have a central velco fastening. Arcs can be easily removed for maintenance. Arcs are a lower cost alternative to tyres/rings.






5.4. Tyres – Keeps the shape even without the air supply

Fabric ducting - Flexible duct ringsCan be manufactured from:
1. Flat aluminium profiles
2. Heat resistant plastic
3. Stainless steel rod





5.5. Spiral reinforcing – Maintains a cylindrical shape

The metal spiral covered by textile maintains the diffuser’s cylindrical shape. Aluminium tyres and tensioners in the profiles or blank ends support this. The spiral is not firmly attached to the textile and can be removed for maintenance.