Puget Sound Energy Filed for Thermal Pilot Permits

The $18.5 million project aims to replace fossil-fuel boilers at Seattle University with a new centralized heat pump network.

Updated on Oct. 12, 2026 in Utilities

Puget Sound Energy Filed for Thermal Pilot Permits

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Puget Sound Energy has applied for construction permits to install a thermal energy network at Seattle University. The pilot project utilizes an industrial heat pump to provide heating and cooling to campus buildings via a shared loop.

Why it matters

This project serves as a critical test for the technical and commercial viability of district thermal energy in urban environments. It aims to reduce building emissions by replacing traditional fossil-fuel boilers with electrified energy transfer technology.

The system features an industrial air-source ammonia heat pump capable of delivering 3,000 MBH of heating and 285 tons of cooling. The project requires 1,500 feet of pipe trenching across public rights-of-way.

The players

Puget Sound Energy

This regional utility provider serves over a million electric and natural gas customers across the Pacific Northwest.

Seattle University

This private Jesuit university is the intended host site for the thermal energy network pilot program.

Seattle Department of Transportation

This city agency manages the public rights-of-way and must approve infrastructure plans before major construction permits are issued.

The details

Engineers plan to install modular plant buildings in a local alleyway and condensing units on a parking garage deck to link campus facilities. The system will include two 2,000 MBH natural gas boilers to serve as emergency backup infrastructure.

2027-2029 marks the funding cycle for the related Seattle Central College project.
The residential transition to district energy in Seattle is projected over the next two decades.

Market Landscape

This pilot reflects a broader push to modernize urban infrastructure by replacing siloed, fossil-fuel-reliant boilers with shared, electrified thermal networks. It positions the utility as a leader in district energy, establishing a model that may eventually replace legacy heating systems across the city.

For Seattle residents, this pilot represents the first steps in a shift toward district heating models that could eventually change how local buildings are heated and cooled. While current impacts are localized to the university, the project will dictate future permitting requirements for similar infrastructure in the city.

The takeaway

Large-scale thermal energy networks represent a growing trend in urban decarbonization by recycling waste heat between buildings. Residents interested in future energy trends should monitor city planning updates for similar district-wide utility shifts in their neighborhoods.