Foreword

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This document was prepared by Technical Committee ISO/TC 86, Refrigeration and air-conditioning, Subcommittee SC 6, Testing and rating of air-conditioners and heat pumps.

This second edition cancels and replaces the first edition (ISO 21978:2021), which has been technically revised.

The main changes are as follows:

— values of uncertainties have been corrected;
— descriptive terms or names have been revised following ISO/IEC Directives;
— errors in Annex A have been corrected;
— typos have been corrected.

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.

BS ISO 21978:2023

Air to water heat pumps. Testing and rating at part load conditions and calculation of seasonal coefficient of performance for space heating

Current

Published:

31 Dec 2023