ISO INTERNATIONAL STANDARD 14683 Third edition 2017-06 Thermal bridges in building construction Linear thermal transmittance Simplified methods and default values Ponts thermiques dans les batiments - Coefficient linéique de transmission thermique - Méthodes simplifiées et valeurs par défaut Reference number IS014683:2017(E) so International Organization for Standardization @ IS0 2017 HEJIANG INSTOFSTANDARDIZATIONC15956617 ed without license from IHS IS0 14683:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, 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 copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Internatinair PrganizationforStandardization nsee-ZHEJIANG INSTOF STANDARDIZAoSQa7 - All rights reserved etworking permitted without license from IHS IS0 14683:2017(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions ..1 4 Symbols and subscripts. 4.1 Symbols .2 4.2 Subscripts. .3 5 Description of the method .3 5.1 Output .3 5.2 General description. .3 5.3 Influence of thermal bridges on overall heat transfer .3 5.3.1 Transmissionheattransfercoefficient .3 5.3.2 Linear thermal transmittance 4 5.3.3 Internal and external dimensions 4 6 Methods for determination of linear thermal transmittance .5 6.1 Outputdata .5 6.2 Calculation time intervals .5 6.3 Input data. .5 6.4 Available methods and expected accuracy .6 6.5 Numericalcalculations .6 6.6 Thermal bridge catalogues. ..6 6.7 Manual calculation methods Default values of linear thermal transmittance 1 7 Annex A (normative) Input and method selection data sheet - Template Annex B (informative) Input and method selection data sheet - Default choices ..10 Annex C (normative) Default values of linear thermal transmittance. ..12 Bibliography .25 iii vided by IHS underI ithout license from IHS