ISO/TR TECHNICAL REPORT 52018-2 First edition 2017-06 Energy performance of buildings Indicators for partial EPB requirements related to thermal energy balance and fabric features : Part 2: Explanation and justification of IsO 52018-1 Performance énergétique des batiments - Indicateurs pour des exigences PEB partielles liees aux caracteristiques du bilan énergétique thermique et du bati - Partie 2: Explication et justification de I'lS0 52018-1 Reference number IS0/TR 52018-2:2017(E) International Organization for Standardization @ IS0 2017 HEJIANG INST OF STANDARDIZATION C1 5956617 ed without license from IHS IS0/TR 52018-2:2017(E) COPYRIGHT PROTECTED DOCUMENT 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 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 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 Internationai ibrg DrganizationforStandardization Licensee-ZHEJIANG INST OF STANDARDIZzRoISQ7 - All rights reserved networking permited without license from IHS IS0/TR 52018-2:2017(E) Contents Page Foreword ..V Introduction. ..vi 1 Scope. 2 Normative references 3 Terms and definitions 4 Symbols and subscripts.. ..1 5 General aspects. ..2 6 Mix of EPB features with requirements 7 Summer thermal comfort. ..3 7.1 Motivation. ..3 7.2 Points of attention. .3 7.3 Indicators. ..5 7.4 Comparable economic strictness .5 7.5 New construction/renovation. .6 7.6 Exceptions. 8 Winter thermal comfort. .6 9 Energy need for heating, or variants ..6 9.1 Motivation .6 9.2 Indicators. 9.3 Comparable economic strictness ..8 9.4 New construction/renovation. 9.5 Exceptions 9 10 Energy need for cooling, or variants ..9 11 Combination of "needs" .9 12 Overall thermal insulation of the thermal envelope .10 12.1 Motivation. ..10 12.2 Indicators. ..10 12.3 Comparable economic strictness ..10 12.4 New construction/renovation. .11 12.5 Intermediate forms between overall and individual thermal insulation 11 13 Thermal insulation of individual elements of the thermal envelope .11 13.1 Motivation .11 13.2 Indicators. ..12 13.3 Points of attention ..12 13.4 Comparable economic strictness ..14 13.5 New construction/renovation. .14 13.6 Exceptions .15 14 Thermal bridges ..15 14.1 General .15 14.2 Motivation .15 14.3 Requirement setting. .15 14.4 Alternative routes. ..16 14.5 New construction/renovation 14.6 Further information 18 15 Window energy performance. ..18 15.1 Motivation .18 15.2 Indicators. .18 15.3 Points of attention 18 ntemaonalgnzatin7-All rights reserved ii icensee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS under license with ISO d without license from IHS Not for Resale, 2017/9/12 02:42:12