824 BROADWAY

Oct. 28, 2026: The initial Thermal Energy Network (TEN) pilot project will be developed at Seattle University, providing an opportunity to demonstrate the technical and commercial viability of TENs within PSE's service territory. This project will serve as a foundation for potential expansion to additional sites subject to Washington Utilities and Transportation Commission ("WUTC") approval and demonstrated success. To date, PSE has submitted a 30% design filing to the WUTC to qualify for Department of Commerce funding. The current design is an estimated $18.5 million, 4-pipe, hot (180°F) and chilled (40°F) system, utilizes an industrial air source heat pump to provide 3,000 MBH of heating and 285 tons of cooling capacity. The proposed project will require the installation of approximately 1,500 feet of trenching to install pipe and the construction of two shipping container sized buildings to house the pump plant.

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