Gas Water Heating Initiative


Long term, this Initiative’s goal is to increase the market penetration of high efficiency water heaters. This will be achieved when consumers request high efficiency equipment and when plumbing contractors, builders, and retailers successfully promote a range of high efficiency equipment.

CEE members aim to increase the number of high efficiency products on the market, increase their percentage of sales, and build a market of sufficient size to enable manufacturers to scale and therefore offer more competitive pricing.

How to participate

Supporting the goals of the Gas Water Heating Initiative requires efforts to increase the general level of awareness of efficient gas-fired water heating options among consumers and contractors. As well, members will demonstrate their support of new high efficiency water heating technologies, along with ongoing work:

  1. incorporating the CEE efficiency specifications for water heaters in incentive programs aligning with at least one CEE Residential Water Heating Specification
  2. undertaking awareness programs that use the communication strategies developed by the CEE committee

Note: Adoption of the NOx emission specification is optional for participation in this initiative except where required by state law. It is certainly encouraged.


In 2014, through the auspices of the Coalition for ENERGY STAR® Water Heaters, CEE reached out to contractors and installers with a wide variety of materials and multiple channels. CEE alerted plumbers and contractors of market entry, benefits of highly efficient residential water heating products, and the impacts of new federal minimum standards. CEE members used Coalition materials, such as the product and rebate finder, trade press articles, and print and presentation materials to communicate directly with the industry and support member programs.

CEE specifications enable member incentive programs to recognize and promote the most efficient products in the marketplace. As such, specifications catalyze market transformation along the distribution chain. As these efforts achieve market change, the CEE tier levels must be adjusted from time to time to encourage continuing advancement. These dual graphics show the growing number of efficient heaters that are currently available on the market and indicate that manufacturers are creating more efficient products. CEE member programs facilitate this progress.

Data Source:
These data were compiled over time by layering CEE tier specifications from the AHRI Directory of Certified Product Performance, now known as the CEE Directory of Efficient Equipment.


Alliant Energy Minnesota

Alliant Energy Missouri

Ameren Missouri

Atmos Energy Colorado

Atmos Energy Kentucky

Atmos Energy Texas

Avista Utilities

Berkshire Gas

Black Hills Energy California

Black Hills Energy Iowa

City of Palo Alto Utilities

Columbia Gas of Massachusetts

Connecticut Natural Gas

Consumers Energy

DC Sustainable Energy

Delta Natural Gas

DTE Energy

Energy Trust of Oregon


Gaz Métro

Great Plains Natural Gas

Liberty Utilities

Montana-Dakota Utilities Montana

Montana-Dakota Utilities South Dakota

National Grid Massachusetts

National Grid Rhode Island

New Jersey’s Clean Energy Company

New Mexico Gas Company

Northern Indiana Public Service

Pacific Gas and Electric Company


Questar Gas Indiana

Questar Gas Utah

Questar Gas Wyoming

San Diego Gas & Electric Company

SourceGas Arkansas

SourceGas Colorado

SourceGas Nebraska

Southern California Gas Company

Union Gas

Unitil Massachusetts

Unitil New Hampshire

Vermont Gas

Xcel Energy Colorado

Xcel Energy Minnesota

Yankee Gas