ISO INTERNATIONAL STANDARD 10916 First edition 2014-06-15 Calculation of the impact of daylight utilization on the net and final energy demand for lighting Calcul de I'effet d'utiliser la lumiere du jour a la demande énergetique net etfinale pourl'éclairage Reference number ISO 10916:2014(E) LSO @ IS0 2014 Not for Resale IS0 10916:2014(E) COPYRIGHTPROTECTEDDOCUMENT ISO2014 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 Case postale 56:CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ IS0 2014 - All rights reserved No reproductic networking permited without license from IHS Not for Resale IS0 10916:2014(E) Contents Page Foreword ..iv Introduction. .. 1 Scope. ..1 2 Normative references 3 Terms and definitions ..2 4 Symbols, indices, and abbreviated terms 3 4.1 Symbols .4 4.2 Indices .5 5 Proof calculation method .5 5.1 Energy demand for lighting as function of daylight .5 5.2 Subdivision of a building into zones. 5.3 Operating time.. .8 5.4 Artificial lighting. .8 5.5 Constant illuminance control .8 5.6 Daylight. ..8 5.7 Occupancy dependency factor Fo,n ..9 6 Daylight Performance Indicator ..9 Annex A (informative) Simple calculation method ..10 Annex B (normative) Comprehensive calculation. ..53 Annex C (informative) Daylight performance indicator ..54 Annex D (informative) Examples. .55 Bibliography .63 iii ded by IHS under lic ense with ISt thout license from IHS Not for Resale