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AIR MOVEMENT


Fabric ducting for air


diffusion


Paul Russon of Prihoda UK looks at the progression of fabric ducting from niche application to widespread versatility.


W 22 July 2019


hen I fi rst started working with fabric ducting – or Air Socks – the target market was mainly food production areas. This was the principle application and even then it was a marmite product, liked or disliked primarily because it was seen to need a lot of maintenance.


Moving forward to today, it is still true to say that fabric ducts have a big role to play in food manufacturing air distribution, but because of modern design in terms of materials and diff user technology, most of the problems I came across 25 years ago are largely gone, to be replaced with an ability to design and manufacture a bespoke system to provide almost any air pattern desired. A dizzying array of air patterns can be achieved and


when matched with non-organic modern materials – often cleanroom non-fi bre shedding specifi cation – most application design headaches can be solved and demonstrated through use of air fl ow graphics, CFD modelling and 3D design software, all being used habitually as part of the design and tender process. There is no better way of diff using lots of cold supply air into a space at low velocity than a fabric diff user. Traditionally, this air would diff use through the fabric ducting material weave so as to have a large diff usion area resulting in delivery at low velocity – the historic criticism here being that this material eventually blocks up with habitual dust in the air stream, leading to an ineffi cient system, loss of cooling and a sock cleaning requirement.


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