What is District Energy

This fact sheet from the Environmental and Energy Study Institute explains the mechanics, energy sources, and benefits of district energy systems, which provide centralized heating and cooling to multiple buildings via underground pipe networks.

• District energy systems provide heating and cooling to multiple buildings in a specific area—such as military bases, airports, hospital or college campuses, and downtown districts—using a central plant and a network of underground pipes to distribute steam, chilled water, and/or hot water. This centralized approach is more fuel-efficient than installing individual heating and cooling systems in every building.
• Thermal energy for these systems can come from various sources, including coal- or gas-fired boilers, industrial "waste" heat, and renewables like biogas, solar thermal, hydrothermal, geothermal, or municipal solid waste. Many systems utilize combined heat and power (CHP) plants, also called cogeneration plants, which can reach energy efficiencies exceeding 80 percent by generating both electric power and thermal energy.
• The United States has over 700 district energy systems, with at least one present in every state, some of which were established in the 1800s. While older systems typically relied on fossil fuels, most modern systems use natural gas, though many incorporate locally-produced renewable fuels.
• District energy offers economic and environmental advantages, including lower operating costs, reduced fuel imports, and decreased peak electrical demand in the late afternoon via district cooling. These systems can also facilitate the transition away from polluting coal plants. However, high upfront costs for the required underground pipe infrastructure and difficulties connecting CHP systems to the power grid can deter developers.
• A May 2011 International Energy Agency report indicates that heat accounts for 47 percent of global final energy consumption and 37 percent in OECD countries, despite federal energy policies primarily focusing on transportation fuels and electricity.

APA

Environmental and Energy Study Institute (2011). What is District Energy. https://www.eesi.org/papers/view/fact-sheet-what-is-district-energy

Chicago

Environmental and Energy Study Institute. What is District Energy. 2011. https://www.eesi.org/papers/view/fact-sheet-what-is-district-energy.

Wikipedia

{{cite report |author=Environmental and Energy Study Institute |title=What is District Energy |date=23 September 2011 |url=https://www.eesi.org/papers/view/fact-sheet-what-is-district-energy |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{environmentalandenergystudyinstitute2011what, author = {{Environmental and Energy Study Institute}}, title = {{What is District Energy}}, institution = {Environmental and Energy Study Institute}, year = {2011}, month = sep, url = {https://www.eesi.org/papers/view/fact-sheet-what-is-district-energy}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }