We firmly believe that this process has resulted in a publication that clearly demonstrates the high level of professionalism which exists within the ductwork community – and we take this opportunity of thanking all those who have contributed to its production. Lighter gauges of steel a reduction in the number of gauge, flange/stiffener manufactured assemblies dispensing with the need to treat spot welds a reduction in coatings thickness/protective finishes further clarification of standard duct sizes used.ĭuring the drafting process, the DWg technical committee has consulted widely with individuals and organisations throughout the building engineering services and construction industry to ensure that the new specification fully reflects the current “state-of-the-art” in terms of both technical expertise and industry best practice. The results have allowed the DWg technical committee to make a number of recommendations in relation to the construction of ductwork which offer a significant commercial advantage. testing has also been undertaken to determine the lifespan of untreated spot welds over a 30-year period. In order to validate the parameters set out in DW/144, BESA has undertaken extensive testing against recently-introduced cEn requirements to measure panel/flange deflection and air leakage testing. DW/144 now incorporates BESA publication, Acceptance Scheme for new Products: rectangular cross Joint classification (DW/tM1), which establishes performance ratings for both air leakage and deflection for cross-joints. of course, a key element of any such review is to ensure that the specification continues to offer realistic benchmarks to which all individuals and organisations are able to perform. this second edition is the result of many years of work by members of the technical committee of the BESA Ductwork group (DWg), who have expanded the content on such subjects as: However, developments in technology and working practices, along with the need to reflect a steady proliferation of European standards, have rendered necessary a far-reaching revision of the original edition.
Since its publication in 1998, the Association’s Specification for Sheet Metal Ductwork –DW/144 – has gained national and international recognition as the standard against which the quality of ductwork manufacture and installation can be measured.
Peter Peter Rogers Rogers Peter Rogers Chairman Chairman chairman Technical Technical Committee Committee technical committee Ductwork Ductwork Group Ductwork Group Group No responsibility of any kind for any injury, death, loss, damage or delay however caused, resulting from the use of the advice and recommendations contained herein, is accepted by the authors or others involved in its publication (including the Building & Engineering Services Association).īuilding Engineering Services Associationī B Bob Lane chairman Executive Executive Committee Committee executive committee Ductwork Ductwork Group Group Ductwork Group Building Engineering Services Association Specification for:ĭW144 (11112) Dec13 PART 1_Layout 1 16:05 ĭW/144 Sheet Metal Ductwork Low, medium and high pressure/velocity air systems 2013 Copyright © 2013 by the Building Engineering Services Association All rights reserved ISBN 978-0-90 Publishing History: First Edition (1998) Second Edition (2013)įurther copies of this publication are available from:īESA Publications Old Mansion House, Eamont Bridge, Penrith, Cumbria, CA10 2BX Tel: 01768 860405, Fax: 01768 860401 Email: Note: This document is based on knowledge available at the time of publication and is meant for you should always seek independent advice.
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