ISO/IEC INTERNATIONAL STANDARD 22237-4 First edition 2021-10 Information technology Data centre facilities and infrastructures - Part 4: Environmental control Technologie de I'information - Installation et infrastructures de centres detraitementdedonnées- Partie 4:Controle environnemental Reference number IEC ISO/IEC 22237-4:2021(E) ISO @IS0/IEC2021 IS0/IEC22237-4:2021(E) COPYRIGHTPROTECTEDDOCUMENT @IS0/IEC2021 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, withoutpriorwrittenpermission.Permission can berequestedfrom eitherIso at theaddress below orIso'smemberbodyinthecountryoftherequester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0/IEC 2021-All rights reserved