Dune Max produces a calculated reverberation time of 0.60 seconds for a typical (200m3) classroom. This is an optimum result as defined by the Department of Education (England and Wales). Dune Max is now fully recyclable. For details of the "Armstrong re-cycling programme" - please contact your local Armstrong sales office.
* Some products may have Dncw values published. These are valid although Dnfw, which is essentially the same as Dncw, has superseded it. For further information on the acoustic performance of Armstrong products please contact our Armstrong Technical Sales.
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