ISO INTERNATIONAL STANDARD 10121-3 Firstedition 2022-10 Test methods for assessing the performance of gas-phase air cleaning media and devices for general ventilation Part 3: Classification system for GPACDs applied to treatment of outdoor air Methodesd'essai pour I'évaluation de la performance des medias etdesdispositifsdefiltrationmoléculairepourlaventilation générale- Partie3:SystemedeclassificationpourlesGPACDappliquésau traitementdel'airexterieur Referencenumber ISO10121-3:2022(E) @ISO2022 IS010121-3:2022(E) COPYRIGHTPROTECTEDDOCUMENT IS02022 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may bereproducedor utilized otherwise in anyform orby any means,electronic or mechanical, including photocopying,orposting on the internet or an intranet, without prior written permission.Permission can be requested from either ISO at the address below orIso's memberbody in thecountryoftherequester. ISO copyright office CP401.Ch.de Blandonnet8 CH-1214 Vernier, Geneva Phone:+41227490111 Email:[email protected] Website:www.iso.org Published in Switzerland ii IS02022-All rightsreserved