SeaWarm Advances Water-Source Heat Pumps for Low-Carbon Heating in the UK and Beyond

SeaWarm, a Scottish renewable energy spinout from the University of Edinburgh, is developing modular water-source heat pumps using its HotTwist technology. The company operates four demonstration projects and has achieved commercial engagement with partners like Growforth Ltd and the Museum of Lead Mining. Recent funding has allowed SeaWarm to transition to scalable commercial deployment, with a focus on expanding in the UK and exploring international markets. The company aims to reduce carbon emissions and energy costs by utilizing nearby water resources.

Published Mar 29, 2026

SeaWarm, a spinout from the University of Edinburgh, is developing innovative water-source heat pumps with its proprietary HotTwist technology, targeting low-cost heating solutions. The company has four demonstration projects validating its technology across various water environments.

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Partnerships with organizations like Growforth Ltd and the Museum of Lead Mining have led to commercial engagements, with three units sold and a strong pipeline of project proposals. Recent funding has enabled SeaWarm to build operational capabilities for commercial sales and refine its product for scalability. The company aims to expand within the UK and explore opportunities in Europe and North America, leveraging its unique all-plastic heat exchanger technology to enhance resilience in diverse water conditions.