Water heaters

All documents related to the mapping and benchmarking of water heaters are shown below. Once published, international comparisons of performance will be shown in the Main Reports section with reports on individual countries listed in the Country Mapping Reports section:


Main Reports

Water heaters Benchmarking Report

Water heaters Benchmarking Report

Throughout the developed world, the heating of water for domestic use is one of the largest consumers of energy in the household sector. However, water heaters vary in their type and mode of operation, the source of energy used and, potentially more than any other domestic appliance, the actual energy consumed is impacted by consumer usage patterns and ambient environmental conditions. Such complexity creates a number of challenges for policy makers seeking to understand and effectively manage water heating energy consumption. To provide policy makers with such information, this Benchmarking Report seeks to compare the performance of storage, instantaneous and heat pump water heaters available in a number of national markets by type, between type and by energy source. The report also seeks to outline the primary regulatory interventions in each jurisdiction and, where possible, provide an analysis of the associated improvements in the energy performance over the 2000-2015 period. The products and regulatory policies compared are those recently available in Australia, Canada, China, Japan, the Republic of Korea, Sweden, and the USA.

Mapping & Benchmarking Annex Overview Materials

IEA 4E Mapping and Benchmarking Annex Overview

Introduction to the IEA 4E Mapping and Benchmarking Annex

A synopsis of key policy lessons learned from the Mapping and Benchmarking Annex

Cartographie et analyse comparative – aperçu général de l’Annexe. (Annex overview in French)

매핑과 벤치마킹 에넥스 개요 (Annex Overview in Korean)

Mapping and Benchmarking Annex Übersicht (Annex Overview in German)

Current Mapping Reports



Australia Mapping Report


Canada Mapping Report


China Mapping Report


Japan Mapping Report

Republic  of Korea

Rep. of Korea Mapping Report


Sweden Mapping Report


USA Mapping Report

Supporting Materials and Historic Reports

Development of Conversion Factors and Overall Approach for International Comparisons of Water Heaters

Water heaters energy and fuel conversion factors

Water heaters market characterisation


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