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Dw144 pdf9/1/2023 Meanwhile, a Committee has already begun work on what will be either addenda or a new edition. A quick overview of the changes is provided in the front of this manual. ![]() This Second Edition of the SMACNA commercial metal and flexible duct construction standards is another in a long line dating from the 1950s. SHEET METAL AND AIR CONDITIONING CONTRACTORS’Įxcept as allowed in the Notice to Users and in certain licensing contracts, no part of this book may be reproduced, stored in a retrievable system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher. END OF PREAMBLE (NOT PART OF THE STANDARD) HVAC DUCT CONSTRUCTION STANDARDS METAL AND FLEXIBLE Is the right of all humans to know and speak the laws that govern them. This legal document is hereby made available on a noncommercial basis, as it ![]() In order to promote public education and public safety, equal justice for all,Ī better informed citizenry, the rule of law, world trade and world peace, HVAC Duct Construction Standards PREAMBLE (NOT PART OF THE STANDARD)
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