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Report Compiled on New Energy Efficiency Standards for Electric Water Heaters (Residential Heat Pump Water Heaters)

March 3, 2021

A working group on energy efficiency standards (*1), a body established under the Agency for Natural Resources and Energy (ANRE), compiled a “Report on New Energy Efficiency Standards for Electric Water Heaters (Residential Heat Pump Water Heaters).”

Concerning new standards for energy consumption efficiency (energy efficiency standards) for electric water heaters (residential heat pump water heaters) under the Act on the Rational Use of Energy (Act No. 49 of 1979), a working group on energy efficiency standards, a body established under ANRE, has been holding discussions since June 2019. As part of this effort, on March 3, 2021, the working group compiled a report titled “Report on New Energy Efficiency Standards for Electric Water Heaters (Residential Heat Pump Water Heaters)” (*2) following the results of its meeting held on February 15, 2021.

Outline of the new energy efficiency standards

Category Presumed household Number of storage tanks Storage capacity Specifications Target standard value
A Small family - - Other than cold region specifications 3.0
B Cold region specifications 2.7
C Standard One Less than 320L Other than cold region specifications 3.1
D Cold region specifications 2.7
E 320L or more
Less than 550L
Other than cold region specifications 3.5
F Cold region specifications 2.9
G 550L or more Other than cold region specifications 3.2
H Cold region specifications 2.7
I Multiple - Other than cold region specifications 3.0
J Cold region specifications 2.7

Note: The target equipment is expected to achieve improvement of the energy consumption efficiency by about 5% from the achievements in the current standard fiscal year (FY2017).

*Notes:

1. The Working Group on Classification Standards for Air Conditioners and Electric Water Heaters of the Energy Efficiency and Conservation Subcommittee of the Committee on Energy Efficiency and Renewable Energy under the Advisory Committee for Natural Resources and Energy
2. Report on New Energy Efficiency Standards for Electric Water Heater compiled by the Working Group on Classification Standards for Air Conditioners and Electric Water Heaters of the Energy Efficiency and Conservation Subcommittee of the Committee on Energy Efficiency and Renewable Energy under the Advisory Committee for Natural Resources and Energy

Related document

Division in Charge

Energy Efficiency Division, Energy Efficiency and Renewable Energy Department