Gas Boiler Systems Initiative


The objectives of this Initiative include increasing quality installations operating in the condensing range, as well as optimizing existing systems to operate at the highest efficiencies allowable. Also, members explore ways to educate building contractors and design engineers about the importance of optimal maintenance protocols. The goals of addressing energy savings opportunities encompass:

  1. increasing the number of quality installed and maintained high efficiency commercial boiler systems
  2. educating building owners, design engineers, and contractors on what constitutes high efficiency in a given system, along with options for maintaining high efficiencies throughout the life of the boiler
  3. educating contractors on the importance of—and methods for—conducting quality installations and maintenance for high efficiency commercial boiler systems
  4. encouraging the creation of an enhanced efficiency metric for commercial boiler systems, in place of the current steady state boiler metrics, which better captures the infield operating efficiency of the boiler system throughout the year
How to participate

Initiative members demonstrate a comprehensive strategy for capturing savings through system optimization. They are required to:

  • Incorporate the CEE Equipment and Functionality Specification for boiler systems in an educational or incentive program
  • Undertake awareness and system optimization measures related to quality installation and quality operations and maintenance


Members continue to view hybrid boiler systems and expanded use of controls as the paths to maximizing gas savings. CEE worked with members and industry to identify savings opportunities through retrofit controls and boiler sequencing. In addition, we established hybrid boiler systems as a path to rightsizing and leading to cost-effective energy savings.

Increasing the availability of efficient products in the marketplace and encouraging consumer uptake of those products are important strategies for realizing energy savings. CEE Commercial Boilers Initiative has helped guide the marketplace. Nearly all hydronic natural gas boiler manufacturers are now producing efficient products (See Hydronic Natural Gas Boiler Manufacturers by Product Efficiency). The efficient models they produce represent a growing share of the active products in operation (Active Natural Gas Hydronic Boilers by Thermal Efficiency).

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, located at


Alliant Energy Iowa

Alliant Energy Minnesota

Ameren Illinois

Ameren Missouri

Atmos Energy Corporation Kentucky

Atmos Energy Corporation Colorado

Atmos Energy Corporation Texas

Avista Utilities Washington

Avista Utilities Idaho

Berkshire Gas

Black Hills Energy Colorado

Black Hills Energy Iowa

Cascade Natural Gas

City of Palo Alto Utilities

Columbia Gas of Massachusetts

Columbia Gas of Ohio

Consolidated Edison Company

Connecticut Natural Gas

Consumers Energy

DC Sustainable Energy Utility

Delta Natural Gas

DTE Energy

Duke Energy

Efficiency Maine

Efficiency Vermont

Energy Trust of Oregon

Energy Trust of Oregon Washington

Focus on Energy—Wisconsin


Gaz Métro

Great Plains Natural Gas

Liberty Utilities

MidAmerican Energy Iowa

MidAmerican Energy Illinois

National Grid Rhode Island

National Grid New York

National Grid Kentucky

National Grid Massachusetts

National Grid New York

New Jersey Natural Gas

New Mexico Gas Company

Nicor Gas

Northeast Utilities (now Eversource)

Northern Indiana Public Service Company

NV Energy

New York State Energy Research and Development Authority

Pacific Gas and Electric Company


Puget Sound Energy

Questar Gas Utah

Questar Gas Wyoming

Questar Gas Idaho

San Diego Gas & Electric Company

SourceGas Arkansas

SourceGas Colorado

SourceGas Nebraska

South Jersey Gas

Southern California Gas Company

Southern Connecticut Gas

Southwest Gas Nevada

Southwest Gas Arizona

Southwest Gas California

Union Gas

Unitil Massachusetts

Unitil New Hampshire

Vectren Corporation Indiana

Vectren Corporation Onio

Vermont Gas

Xcel Energy Colorado

Xcel Energy Minnesota