Residential Water Heaters Specification Version 4.0

Version 4.0 ENERGY STAR specification for Water Heaters is currently under development. Materials related to this revision process are provided below. This process will encompass and supersede the ongoing Version 3.3 specification development process to add optional connected criteria. Materials related to the Version 3.3 revision can be referenced here. Partners and other interested parties with questions or concerns regarding these materials or the revision process can contact Abigail Daken, EPA, at Daken.Abigail@epa.gov or Waterheaters@energystar.gov.

ENERGY STAR Final Version 4.0 Residential Water Heaters Specification and Test Method to Validate Demand Response, Version 1.1 – March 29, 2022

ENERGY STAR Version 4.0 Water Heaters Final Specification Cover Memo (PDF, 152 KB)

ENERGY STAR Connected Residential Water Heaters Test Method to Validate Demand Response V1.1 (PDF, 419 KB)

ENERGY STAR Version 4.0 Water Heaters Final Specification and Partner Commitments-March2022 (PDF, 585 KB)


ENERGY STAR Version 4.0 Water Heaters Final Specification and Test Method to Validate Demand Response – Monday, April 5, 2021


Thursday, March 4, 2021

Stakeholder comments to the Version 4.0 Final Draft Water Heater Specification & Final Draft Test Method to Validate Demand Response

A.O. Smith Comments (PDF, 573 KB)
Xcel Comments (PDF, 178 KB)
BlocPower Comments (PDF, 98 KB)
CA IOUs Comments (PDF, 180 KB)
CEE Comments (PDF, 1.8 MB)
NEEA Comments (PDF, 176 KB)
NRDC Comments (PDF, 167 KB)
SkyCentrics Comments (PDF, 220 KB)


ENERGY STAR Water Heaters Final Draft Version 4.0 Specification and Test Method to Validate Demand Response- Thursday, February 4, 2021


Stakeholder Comments to the Version 4.0 Draft 1 Water Heater Specification & Draft 2 Test Method to Validate Demand Response- December 9, 2020


Draft 1 Version 4.0 Specification & Draft 2 Test Method Webinar- November 20, 2020

 Please click here to view the webinar recording.


Draft 1 Version 4.0 Water Heater Specification & Draft 2 Test Method to Validate Demand Response- October 28, 2020

Please refer to the Version 3.3 Specification Revision Page for earlier documents related to the Connected Criteria development.