Nancy District Heating: The Metropolitan Area Develops Its Network

The Greater Nancy Metropolitan Area is currently extending its district heating network across several neighborhoods in the city. The ongoing works aim to interconnect eight heating networks powered by household waste recovery and biomass. This development concerns the equivalent of 39,000 homes and contributes to the territory's energy transition.

Extension Works Underway in Several Neighborhoods

The Blandan-Haussonville Sector Under Construction Until May

Émile-Gebhart Street has been experiencing district heating network extension works since April 7. A trench runs for several meters through the asphalt. Parking is prohibited on both sides of the roadway, from Marsal Street to About Street, until May 7. Only construction vehicles circulate on this section.

These interventions are part of the development program led by Estia, main concessionaire of the district heating networks of the Greater Nancy Metropolitan Area.

A Deployment Schedule Spread Over Several Months

The Blandan, Donop, Haussonville, and Saurupt sectors are among the areas affected by these construction sites. Saint-Pierre-René-II and Bonsecours will see works continue until September. In Vandœuvre, interventions are scheduled until the following first semester.

This progressive deployment schedule allows for connecting new buildings while limiting disruptions for residents.

Eight Interconnected Heating Networks Eventually

The Current Configuration of the System

The Metropolitan Area has six heating networks. Four are operated by Estia, two by S.E.E.V. These infrastructures cover a significant portion of heating and domestic hot water needs in Nancy and neighboring municipalities.

This current configuration has enabled the development of initial experience with collective district heating, but the community wishes to expand this system.

The Eight Networks at the Target Horizon

Within two years, eight networks will structure the heat supply across the territory: Saint-Julien-Kennedy, Blandan-Médreville, Plateau de Haye, Laxou-Villers, Saurupt, Vandœuvre-Brabois, and Saint-Max-Essey-Tomblaine.

The strategy is based on two axes. First, interconnect existing networks to pool resources and secure supply. Second, develop new networks toward the southeast of Nancy and the east of the metropolitan area, zones previously less covered by the system.

District Heating Powered by Virtuous Energies

How the Heating Network Operates

The principle resembles central heating, but at the neighborhood scale. Heat is produced in a very large capacity boiler room. This centralization optimizes production costs and allows the use of energy sources difficult to exploit at the individual dwelling scale.

Once produced, heat circulates through underground pipes to connected buildings. Each building has a substation that transfers heat to radiators and domestic hot water production.

Local and Renewable Energy Sources

The Nancy network relies primarily on two resources. Energy recovery from household waste, via the Ludres center operational since 1995, provides a significant portion of the energy. Biomass boiler rooms complement the system.

This combination offers two advantages. Environmental first: waste and wood replace fossil fuels, reducing CO2 emissions from domestic heating. Economic second: these local resources limit exposure to gas and oil market fluctuations.

39,000 Homes Already Connected

Significant Heating Capacity

The Metropolitan Area's public district heating service heats each year the equivalent of 39,000 homes. This capacity covers both heating and domestic hot water needs of connected buildings.

This figure places Greater Nancy among the best-equipped French metropolitan areas in terms of heating networks.

An Ambitious Project Led by the Community

The Metropolitan Area displays a clear vision: develop and interconnect heating networks across the entire territory. Estia, as main concessionaire, has been managing this progressive extension since the system was strengthened several years ago.

Current works translate this ambition into reality, neighborhood by neighborhood.

What District Heating Changes for Residents

An Alternative to Individual Systems

Concretely, a home connected to the heating network no longer has an individual boiler. No annual maintenance to plan, no tank to fill, no breakdown to handle alone. The collective substation takes over.

Operating costs are shared among all network subscribers. Service continuity is guaranteed by the concessionaire, which ensures maintenance of central equipment.

An Ecological and Economic Benefit

Nancy's district heating uses local energies: wood and household waste. These resources replace natural gas or oil that each home would consume with an individual boiler. The carbon footprint of domestic heating decreases mechanically.

In terms of pricing, heating networks offer relative stability against energy market fluctuations. The cost per kilowatt-hour remains linked to local resources whose price evolves less abruptly than that of imported hydrocarbons. For households, this translates into better predictability of heating expenses.