Energy Center Phoenix

Energy Center Phoenix provides energy-efficient and environmentally sound district energy and/or combined heat and power services to buildings in downtown Phoenix and Tucson, Arizona, and on the Arizona State University campus. The downtown Phoenix system started it all, beginning operation in 2001 by serving Bank One Ballpark, now called Chase Field.

With a reliability record of 99.9% since 2001, Energy Center Phoenix produces and distributes chilled water around the clock to customer buildings in the Phoenix central business district including the City of Phoenix, Chase Field, US Talking Stick Resort Arena, Phoenix Convention Center, Arizona State University, Maricopa County, Sheraton Hotel, several biomedical research facilities and high-rise condominiums and office complexes. This system encompasses three main plants and two auxiliary plants conditioning more than 12 million square feet of building space via four miles of chilled-water pipelines.

Energy Center Phoenix has demonstrated customer energy savings of approximately 13% after their connection to the downtown system. The company was recognized by the International District Energy Association as the 2008 "System of the Year" for its exemplary performance and service, and is a member of the Combined Heat and Power Partnership program operated by the U.S. Environmental Protection Agency.

In addition, Energy Center Phoenix operates and maintains district energy/combined heat and power plants for Arizona State University that provide heating, cooling and electricity to the ASU distribution system that connects to 88 buildings on ASU's Tempe campus and five buildings on the ASU Polytech campus in Mesa.

System Profile

Area served: 3 square miles in downtown Phoenix

Buildings on system: 43

Building space served: 14 million square feet

Total System Capacity: 40,000 tons chilled water

Plants: Three plants — the Energy Center Phoenix District Energy Plant, Convention Center Plant and Chase Field Plant, which house a total of 14 chillers and two thermal ice storage tanks; two auxiliary plants—US Airways and Arizona Center, interruptible customers that have a total of six chillers

Distribution Network: 4 miles of chilled-water piping


  • Chase Field (home of the Arizona Diamondbacks)
  • CityScape
  • Fourth Avenue County Jail
  • Phoenix Convention Center
  • Sheraton Hotel
  • Talking Stick Resort Arena (home of the Phoenix Suns)



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