Airthium Company Information

Founded in 2016 and based in Paris, France, and Austin, Texas, Airthium is an industrials company operating within the climate sub-industry. The company, which has a team of 12, participated in Y Combinator’s S17 batch in 2017 and has since raised $2.6 million in seed funding between 2021 and 2023. Airthium offers innovative turnkey solutions aimed at helping customers meet their decarbonization targets and ESG goals economically. The company’s core product is a very-high-temperature heat pump designed to disrupt traditional Stirling engine technologies. This heat pump is capable of operating efficiently across a temperature range of 150°C to 550°C, addressing a $13 billion per year total addressable market. Airthium’s heat pump technology boasts up to 86% of Carnot’s efficiency with coefficients of performance as high as 3.5. Its design eliminates the need for high-temperature sliding or rotating seals, significantly reducing maintenance and downtime. The heat pump uses Helium (R704) as the working gas and can handle various heat transfer fluids, capable of harvesting waste heat up to 930°F and atmospheric heat down to -60°F, upgrading it to 550°C.

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