Corporate Members

• AGL Resources
• Alagasco
• Atmos Energy
• Avista Utilities
• Black Hills Energy
• CenterPoint Energy
• Chesapeake Utilities
• Citizens Energy
• Columbia Gas
• CPS Energy - San Antonio
• Dominion Energy, Inc.
• DTE Energy (MichCon Gas Co.)
• Enbridge Gas Distribution Inc.
• Florida Public Gas Group
• Florida Public Utilities
• Gaz Metropolitain, Inc.
• Heritage Gas
• Intermountain Gas Co
• Laclede Gas Company
• Manitoba Hydro
• Missouri Gas Energy
• Mobile Gas Service Corp
• Municipal Gas Authority of Georgia
• National Fuel Gas Distribution Corp.
• National Grid
• New Jersey Natural Gas Co
• Nicor Inc.
• NIPSCO
• Northwest Natural
• ONEOK - Kansas Gas
• Philadelphia Gas Works
• Piedmont Natural Gas
• Puget Sound Energy
• Questar
• Richmond, VA (City of)
• South Jersey Industries
• Southern California Gas Co.
• Southern Natural Gas Company - El Paso
• Southwest Gas Corporation
• TECO Peoples - Florida
• The Gas Company (Hawaii)
• UGI Utilities
• Union Gas Ltd.
• VECTREN
• Washington Gas Company
• Yankee Gas (Northeast Utilities)

Affiliate Members

• Advanced Mechanical Technology
• Aisin - Gas Heat Pump A/C
• Altronic
• Alturdyne
• AO Smith
• American Gas Association
• Armstrong International
• Big Ass Fans
• Bradford White Corporation
• Capstone
• Clayton Industries
• ClearEdge Power
• Cleaver-Brooks Boilers
• Combustion & Energy
• ECR International-Freewatt
• Energenic
• Enershield Industries
• Gas Technology Institute
• GREFFEN Systems
• Home Services USA
• Hurst Boiler and Welding
• Hydronics Industry Alliance
• Insultech (Shannon Enterprises)
• IntelliChoice Energy
• Logica3
• Marathon Engine Systems
• Marathon International
• Modine Manufacturing
• Natural Gas Technology Centre (Canada)
• Natural Gas Vehicle Institute
• Novitherm Canada Inc.
• P&E Automation
• Precision Temp
• Quik Water, Inc.
• Relms, Inc
• Rheem Water Heaters
• Rinnai
• Schwank Ltd.
• Solar Turbines
• Superior Boiler and Welding
• Superior Radiant Products Ltd.
• Tecogen
• The Growth Coach
• Williams Furnace