ISO INTERNATIONAL STANDARD 14857 First edition 2014-02-15 Thermal performance in the built environment Determination of air permeance of building materials Performance thermique en environnement bati-Détermination de la perméance a I'air des materiaux de construction Reference number IS0 14857:2014(E) ISO Copyright intemational Organizatin for Standardizatin @IS02014 HS under I Not for Resale IS0 14857:2014(E) COPYRIGHT PROTECTED DOCUMENT @ISO2014 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 Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2014 - All rights reserved Not for Resale IS0 14857:2014(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Sampling and conformity control ..1 5 Test specimens. ..1 5.1 Number. 5.2 Dimensions. .1 5.3 Preparation ..2 5.4 Conditioning ..2 6 Principle ..2 7 Apparatus. ..2 8 Procedures. .3 8.1 Specimen installation .3 8.2 Test procedure. .4 9 Calculation and expression of results .6 9.1 Standard temperature and pressure .6 10 Precision .6 11 Test report .7 Annex A (normative) Procedure for estimating errors in derived quantities ..13 Copyrioteatinal rganiason te Sanarizal rights reserved iii se with ISt without license from IHS Not for Resale