ISO INTERNATIONAL STANDARD 11855-4 Second edition 2021-08 AMENDMENT 1 2023-10 Building environment design Embedded radiant heating and cooling systems Part 4: Dimensioning and calculation of the dynamic heating and cooling capacity of Thermo Active Building Systems (TABS) AMENDMENT 1 Conception de I'environnement des batiments - Systemes integrés de chauffage et de refroidissement par rayonnement - Partie 4: Dimensionnement et calculs relatifs au chauffage adiabatique et a la puissance frigorifique pour systemes d'élements de construction thermoactifs (TABS) AMENDEMENT1 Reference number IS0 11855-4:2021/Amd.1:2023(E) ISO @ IS0 2023 IS0 11855-4:2021/Amd.1:2023(E) COPYRIGHT PROTECTED DOCUMENT @IS02023 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 member body in the country of the requester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Email: [email protected] Website: www.iso.org Published in Switzerland ii @IS0 2023 - All rights reserved