A platform of networking and knowledge, CELSIUS takes a holistic approach to overcome technical, social, financial and political barriers to district heating and cooling solutions

Co-funded by the EU, CELSIUS collaborates throughout the whole spectrum of planning, implementing and optimising new and existing smart infrastructure solutions for heating and cooling. There is enough waste heat produced in the EU to heat EU’s entire building stock, and EU has recognized that district heating and cooling systems have an important role to play in order to reach the energy efficiency goals. District heating and cooling will also adress problems with fossil fuel dependency, air quality and greenhouse gas emissions.

As a New CELSIUS City, each member will benefit from the CELSIUS offerings – Workshops, Study visits, access to the CELSIUS Toolbox and Connections to the CELSIUS Expert Group. The broad knowledge transfer spans topics such as technical best practice solutions, fuel management, business models and gaining customer trust.

Celsius Animation

Here is the long version.

Only have a minute?
Watch the short animation here.

Upcoming Events

15-16 October, Riga: Implementing SEAPs – a Means to Ensure Secure, Clean and Efficient Energy in Smart Cities
The Ukrainian-Russian gas supply crisis during last winter and various social challenges in Europe have resulted in leading Latvian municipalities reinforcing their sustainable energy policies: boosting building renovations, modernising district heating and developing smart energy systems. CELSIUs will participate in a panel discussion focusing on the following questions: Which are the most beneficial sustainable energy actions today? What benefits are expected from the implementation and monitoring of these actions? How can these actions can be supported by local, national and EU funds?

10 November, Islington Borough, London: CELSIUS Workshop
This workshop will be relatively small. Local Authority/City participants will be able to discuss issues that are important to them and see how leading EU cities have addressed them or what ideas they may have for addressing them. The Agenda and topics to be discussed are still being finalised but will include:
• Integrating waste to energy plants and issues to consider in contract negotiations – Gothenburg Energi and Warmtebedrijf Rotterdam
• A 26km heat main – the business case – Warmtebedrijf Rotterdam
• System balancing, thermal storage and integrating multiple heat sources – Gothenburg Energi and Warmtebedrijf Rotterdam
• Heat recovery from effluent in sewer networks – Rheinenergie Cologne
• Lower temperature heat networks and integrating low grade waste heat sources – Islington Council and Greater London Authority
• Site visit to Bunhill Heat and Power Heat Network – Islington Council

:For more information and registration

2 December, Paris: Amorce’s 11th District Heating Conference

Join us!


– engaging with potential CELSIUS Cities

of the city

– fill out New CELSIUS city questionnaire

Support need identification

– discussion between project and city

    Letter of Commitment

– the city commits to become a CELSIUS City


– demonstrators, toolboxes, workshops and expert group

District Heating and Cooling

District heating is a heating system consisting of a heating plant and a pipe network filled with hot water. The hot water is circulated by pumps, from the heating plant to the client and back again to the heating plant. A heat exchanger at the customer transfers the heat from the district heating network to the building’s own heating and hot water systems. The return water continues out through the return pipe and is pumped back to the heating plant, where it again is heated.