The essentials to know about the district heating project in Épernay

At the heart of the town of Épernay, the energy transition is illustrated by an ambitious urban heating project that aims to transform the way the city is heated. This project, supported by the local community, relies on an innovative infrastructure powered 100% by renewable energy. For several months, the work has transformed the landscape with a clear objective: to significantly reduce polluting emissions related to fossil fuels. Épernay is thus engaging in an eco-responsible and exemplary approach in the region, offering a sustainable solution to residents and public services that depend on the heating network. The initiative is part of a broader dynamic of energy modernization, aiming to enhance energy efficiency through biomass, replacing the old gas boiler.

Urban heating in Épernay: towards an innovative and sustainable infrastructure

The urban heating project in Épernay is not limited to the simple modernization of an existing system. It represents a complete redesign of the local energy infrastructure aimed at making the city self-sufficient in renewable heat. Located partly at Mont Bernon, the new biomass boiler replaces the old gas installation that has been in place since 1975. This transformation will supply approximately 1,100 apartments and several public buildings. A major evolution that fits into the community’s strategy to meet its climate objectives and ensure a more environmentally friendly heating solution.

This infrastructure uses biomass technology, relying on the combustion of organic materials primarily sourced from local resources. This renewable energy source offers several major advantages:

• Reduction of CO2 emissions: unlike fossil fuels, biomass contributes to a carbon-neutral cycle, limiting the impact on the greenhouse effect.
• Valuation of organic waste: pruning wood, chips, and agricultural residues can be used to produce heat.
• Energy diversification: the system ensures stable supply, independent of fluctuations in fossil fuel prices.

The urban heating network now extends across several neighborhoods of Épernay, with a renewed and optimized layout to improve distribution efficiency. This translates into lower thermodynamic losses in the pipes and better responsiveness to consumption needs. The goal is also to integrate other renewable energy sources in the long term to serve an ever-increasing number of buildings and enhance the energy sovereignty of the municipality.

Element	Old system	New biomass project
Type of energy	Industrial gas	100% renewable biomass
Heating capacity	Approximately 1,100 housing units	1,100 housing units + public buildings
Duration of work	–	16 months
Environmental impact	High CO2 emissions	Significant emissions reduction

The project benefits from strict technical support to ensure compliance with current standards and the safety of the installations. The initiative is also part of a broader framework of public policies aimed at supporting the energy transition in the territories, notably through national subsidies that local authorities mobilize for such projects.

The impact of renewable urban heating on the Épernay community

The Épernay community plays a central role in the success of this urban heating project. This collective system represents a real lever to make the city more ecological and less dependent on fossil fuels. By choosing biomass, the City relies on local, renewable, and more economically viable energy in the long term. For residents, this translates into more reliable and less costly heating thanks to the pooling of resources and infrastructures.

The project also has a strong social and environmental impact:

• Creation of local jobs: the operation and maintenance of the new boiler involve specific skills and offer professional opportunities in Marne.
• Reduction of nuisances: less odor and air pollution in the served neighborhoods.
• Improvement of quality of life: better air quality combined with clean energy provides a tangible benefit for all.

This shift towards renewable urban heating is part of the community’s commitment to strengthening its engagement in favor of the energy transition. With a guarantee of 100% coverage of heating needs by renewable energies, Épernay affirms its role as a pioneering and exemplary city. Moreover, the project is an excellent opportunity to raise awareness among citizens about contemporary energy challenges and good practices for optimizing consumption.

Aspect	Before project	After implementation
CO2 emissions	High, related to industrial gas	Almost none, renewable biomass
Average cost for users	Higher (variable gas price)	Stabilized, more economical
Local employment	Limited	Strengthened (maintenance and operation)
Air quality	Polluted, SO2 emissions	Improved, reduced atmospheric pollutants

Local public services also benefit from better control over their energy consumption, facilitating budget planning. In this sense, the City of Épernay is working to make all its administrative and public buildings connectable to this network, a significant advantage for reducing overall energy costs.

Key stages of the urban heating network renewal project in Épernay

The implementation of the renewable urban heating project in Épernay required precise organization and rigorous coordination among the various stakeholders. Since the launch of the works, the site has followed an adapted planning to limit disruption to traffic and the daily lives of residents. The renewal of old infrastructures includes several major phases:

• Diagnosis and preliminary studies: analysis of needs, the state of the existing network, and technical and economic feasibility study.
• Design and planning: drafting of new layouts, selection of suitable equipment, consultation with stakeholders.
• Civil engineering works: opening of trenches, laying of pipes, and rehabilitation of streets.
• Installation of biomass boilers: setting up production units with modern equipment ensuring performance and safety.
• Testing and commissioning: verification of tightness, balancing of the network, control of operating parameters.

During the sixteen months of intervention, measures were taken to ensure the continuity of heating service, notably through the implementation of temporary solutions and transparent communication with users. The technical complexity of the project requires strong expertise, both in industrial plumbing and energy management. It is also essential to ensure compliance with environmental standards to minimize nuisances and guarantee the quality of the network.

Phase	Estimated duration	Description
Preliminary studies	3 months	Diagnosis and analysis of infrastructures
Design	2 months	Finalization of plans and technical choices
Civil engineering works	8 months	Installation of pipe networks
Installation of biomass boiler	2 months	Implementation and technical connections
Testing and commissioning	1 month	Quality control and adjustments

Compliance with regulations, maintenance of equipment, and safety are major issues throughout the project. Technical success also depends on good collaboration between the community, local companies, and the chosen operator, Idex, which will manage the network for several years under a public service delegation contract (DSP).

The energy and economic benefits of switching to biomass urban heating in Épernay

The installation of a biomass boiler in Épernay represents a major energy turning point. Replacing industrial gas with a renewable energy source improves both the energy efficiency of the urban network and generates substantial savings for users and the community.

The main observed and expected benefits are numerous:

• Significant reduction in energy bills: biomass, often sourced from local resources, has a more stable and competitive cost compared to fossil fuels sensitive to international fluctuations.
• Optimization of energy efficiency: thanks to a modernized infrastructure with better balancing, heat is distributed with less technical loss.
• Reduced environmental impact: the approach decreases dependence on hydrocarbons and allows compliance with local and national climate commitments.
• Local economic stimulation: the use of biomass supports agricultural and forestry activities around Épernay, creating a virtuous cycle.

Criteria	Situation before the project	Situation after the project
Average energy bill	Higher and variable	Reduced and stabilized
Total energy consumption	Less optimized	Reduction of 15-20%
Polluting emissions (CO2, SO2)	Significant due to gas	Almost none with biomass
Employment related to the project	Low	Creation of local jobs

The Épernay community ensures ongoing monitoring and optimization of the system to maintain a high level of performance. This type of biomass urban network, well designed, thus offers a robust and sustainable solution to contemporary energy challenges. It aligns with France’s trajectory to reduce fossil gas consumption across the territory, in accordance with the current regulations and national aid schemes available to local authorities.

Awareness and support for users of renewable urban heating in Épernay

Promoting the use of a renewable urban heating network requires constant dialogue with users. The City of Épernay and its partners invest in information and support tools to facilitate the energy transition for residents and building managers.

Several actions are deployed to ensure a clear understanding of the issues and benefits:

• Participatory workshops: meetings and exchanges to answer questions about the operation and advantages of the network.
• P educational materials: guides, brochures, and online content tailored to all profiles to better understand the transition.
• Dedicated services: an accessible point of contact for technical requests and personalized advice.
• Taking feedback into account: continuous adaptation of services based on user remarks and technical developments.

This information work is essential to ensure citizens’ adhesion to a collective system. It also contributes to optimizing uses and developing economical and responsible practices. The success of this project thus relies on both technical mastery and effective communication aimed at all beneficiaries of the heating network.

Support tools	Objectives	Expected results
On-site workshops	Answer questions	Better ownership of the project
P educational materials	Provide clear information	Increased understanding
Dedicated customer service	Personalized assistance	Effective interventions
Feedback collection	Continuous improvement	Optimization of uses

Moreover, the support goes beyond simply technical aspects. It includes advice on maintaining individual installations connected to the network and on managing consumption, critical elements to ensure the sustainability and performance of the whole system. Through this approach, Épernay demonstrates a true example of successful transition driven by cooperation between communities, operators, and users.