ISO INTERNATIONAL STANDARD 29462 Second edition 2022-07 Field testing of general ventilation filtration devices and systems for in situ removal efficiency by particle size and resistance to airflow Essais in situ de filtres et systemes de ventilation genérale pour la mesure de I'efficacité en fonction de la taille des particules et de la resistanceal'écoulementdel'air Reference number IS0 29462:2022(E) ISO @ ISO 2022 IS0 29462:2022(E) COPYRIGHTPROTECTED DOCUMENT @IS02022 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either Iso at the address below or Iso's memberbody inthe country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 0111 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii IS02022-Allrightsreserved