Duluth Energy Systems, Ever-Green Energy Duluth Energy Systems is the city-owned steam district energy system that has provided the Canal Park and Central Business Districts with stable, reliable heat since 1932. The system provides heating to 164 buildings and cooling to five buildings in Canal Park and downtown Duluth. This legacy system is still primarily steam-based, with a smaller hot water loop serving the Canal Park district. The plant is currently fuel flexible with the ability to use coal or natural gas, with potential for biomass commingling with the solid fuel boiler. In 2012, Ever-Green worked with the City of Duluth create a framework for the future of this system, starting with the steam-to-hot-water transition of the distribution system, beginning with 16 blocks of Superior

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