FINAL INTERNATIONAL ISO/FDIS DRAFT STANDARD 52120-1 IS0/TC205 Energy performance of buildings - Secretariat:ANSI Contribution of building automation Voting begins on: and controls and building 2021-09-07 management Voting terminates on: 2021-11-02 Part 1: General framework and procedures ISO/CEN PARALLELPROCESSING RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH DOCUMENTATION. INADDITIONTOTHEIREVALUATIONAS Reference number IS0/FDIS52120-1:2021(E) LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STAN- RENCE MAY BE MADE IN @ ISO 2021 NATIONAL REGULATIONS. IS0/FDIS 52120-1:2021(E) COPYRIGHTPROTECTEDDOCUMENT IS02021 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 below or Iso's memberbody in the country ofthe requester. ISO copyright office CP 40i : Ch.de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22.749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2021 - All rights reserved IS0/FDIS52120-1:2021(E) Contents Page Foreword .. Introduction ..i. 1 Scope. 2 Normative references 3 Terms and definitions 4 Symbols, subscriptsand abbreviatedterms ..5 4.1 Symbols .5 4.2 ..5 Subscripts. 4.3 Abbreviated terms .5 5 Description of the method .6 5.1 Outputof the method .6 5.2 General description of the method(s) .6 5.3 Selectioncriteriabetweenthemethods .6 5.4 BAC and TBM functions having an impact on the energy performance of buildings 7 5.5 BAC efficiency class. .21 5.6 BAC and TBM functions assigned to the BAC efficiency classes .22 5.7 ApplyingBACforEnMSandmaintainingBACenergyefficiency .32 5.7.1 General. 32 5.7.2 Applying BAC for EnMS. .32 5.7.3 Maintaining BAC energy efficiency .32 Method 1 -Detailed calculation procedure of the BAC contribution to the energy 6 performance of buildings (detailed method) .33 6.1 .33 Outputdata 6.2 Calculation timeintervals. .34 6.3 Input data - Source of data. .35 6.4 Calculation procedure .35 6.4.1 Applicable calculation time interval .35 6.4.2 Energyperformancecalculation .35 Method 2 - Factor based calculation procedure of the BAC impact on the energy 7 performance of buildings (BAC factor method) .38 7.1 Outputdata .38 7.2 Calculation timeinterval .38 7.3 Calculation procedureEnergy calculation .39 7.3.1 General. .39 7.3.2 BACefficiencyfactorvalues .40 7.3.3 ApplicationoftheBAC efficiencyfactors. .41 8 Simplified input data correlations. .42 9 Quality control ..42 10 Compliancecheck .42 AnnexA(informative)BACefficiencyfactors ..43 Annex B (normative) Minimum BAC function type requirements ..48 AnnexC (informative)Determinationof theBACefficiencyfactors ..52 AnnexD (informative)ExamplesofhowtousetheBACfunctionlistofIS016484-3to describefunctionsfrom this document ..70 AnnexE(informative)ApplyingBACforEnMS specifiedinIS050001:2018 ..73 .87 AnnexF (informative)MaintainBACenergyefficiency Annex G (informative) Control accuracy .91 @ IS0 2021- All rights reserved iii IS0/FDIS52120-1:2021(E) Bibliography 92 iv IS0 2021-All rights reserved IS0/FDIS52120-1:2021(E) Foreword Iso (theInternational Organization for Standardization) is a worldwidefederation ofnational standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees.Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee.International ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are describ