Calogena
Calogena develops a small modular nuclear reactor (SMR) designed specifically to decarbonize district heating networks. The 30 MW thermal reactor operates at low pressure and temperature, using direct heat transfer to supply approximately 20,000 homes per module without combustion or carbon emissions. The company targets deployment in French and European cities starting in 2030.
- Energy
- Clean Technology
- Hardware
Funding
Raised to date
€140MRaised to date based on public sources. This may differ from the amount the company actually raised and is based only on what is publicly available on the internet.
Est. $152.6M$43.6M across 1 disclosed round
€40M · Grant
Announced Nov 2026 · from article date
Disclosed cumulative: $43.6M
Reported total $152.6M
Incomplete round history. $109M of the $152.6M reported total isn’t matched to a known round.
Founders
Founder details are not available yet.
Product
Problem
Approximately 70% of heating and hot water in Europe is produced using fossil fuels, and district heating networks serving over 70 million Europeans are powered by combustion sources—gas, oil, coal, wood, or waste—95% of the time. This reliance on burning fuels generates significant carbon emissions and fine particulate pollution, creating a major challenge for cities seeking to decarbonize their heat supply.
Solution
Calogena develops a small modular nuclear reactor (SMR) designed specifically for district heating, providing a stable, low-carbon heat source without combustion. The reactor operates at low pressure and low temperature, using direct heat transfer with a minimal number of auxiliary systems, making the design intrinsically simpler and safer than conventional reactors. Each 30 MW thermal module can supply heat to approximately 20,000 households, and the solution is adaptable to various local constraints. The technology builds on mature, proven water-based reactor technologies, and Calogena estimates it can deploy its solutions in French and European cities starting in 2030.
Target Audience
Primary customers are local governments and municipalities operating or planning district heating networks, as well as district heating operators and energy utilities serving urban areas in France and Europe.
Features
- 30 MW thermal power output per module, sized for district heating applications
- Low-pressure, low-temperature operation with direct heat use, eliminating the need for complex steam cycles
- Simplified design with a very limited number of auxiliary systems, enhancing intrinsic safety
- Combustion-free operation producing no carbon emissions or fine particulate matter
- Based on mature water-cooled reactor technologies proven over several decades
- Adaptable to local constraints for integration into existing urban heating networks