Heating and cooling: efficient, green, smart networks!

Harnessing clean, local, inexpensive energy to provide district heating, domestic hot water and air conditioning. We are a major player in heating and cooling networks which builds and operates urban networks covering districts, cities and metropolitan areas. Today in France, some 2.3 million people already rely on a heating network. You could be the next to benefit from our expertise!

Dalkia technician in an energy production unit for a heating network

The concept: heating with a collective network

Heating networks supply heating - and often domestic hot water - to an entire district or city. These production facilities can be supplied by renewable energy (biomass, geothermal, marine, etc.) and recovered energy (from household waste, heat from data centres or industry, etc.). It is a method that is becoming more widespread. France’s energy transition law aims to achieve a fivefold increase in the amount of renewable and recovered energy delivered through these networks by 2030.

But that is just the tip of the iceberg! Dalkia combines modern technologies and creates synergy between different forms of energy and uses to develop more intelligent, connected networks called ‘smart grids’. It is now possible to predict spikes in demand and even store renewable energy. We continually improve the networks to better recover energy.

We also produce cooling in our networks, providing localized, dedicated air conditioning for groups of buildings which is eco-friendly and efficient, either jointly with heating or in separate cooling networks.

Heating and cooling networks are driving forward the energy transition process at regional level, serving all types of buildings, from residential complexes to schools, hospitals, offices, industrial sites and more.

We’re here to help you design, build and operate your own heating or cooling networks.


Dalkia operates over 330 heating and cooling networks with 2,900 km of pipes. 

The benefits: guaranteed, available energy

Heating for less

Energy is produced in large quantities, ensuring stable, competitive rates with lower maintenance costs. When over 50% of the network’s energy comes from renewable or recovered sources, a reduced 5.5% VAT rate is applied in France.

Comfort and safety you can count on

Occupants enjoy a stable temperature and a reliable hot water supply. There is no gas, fuel, boiler, or smoke vents in the building, eliminating the risk of carbon-monoxide poisoning.

A smaller carbon footprint

Supplying most of the heating or cooling network’s needs with renewable or recovered energy reduces your CO2 emissions, shrinking your buildings’ carbon footprint. The network harnesses all the forms of local energy available.

Our services

Our experts draw on our long-standing expertise in heating and cooling networks to guide you in implementing these complex energy solutions for your area or buildings. Contact our teams to build your network or connect to an existing network.

Design, build and operate your network

Local authorities, we will guide you in finding the optimal route for your network. With Dalkia, you supply your area with heating and/or cooling that is competitive, eco-friendly and permanent! On average, 55% of our…

Connecting to a network

Regardless of your business sector, we can connect your buildings to an existing heating or cooling network. At Dalkia, we offer much more than just heating and air conditioning! You receive stable, competitively priced…

Specialised guidance

Our customer relations centre ensures service continuity, with technicians standing by 24/7. We provide specialised guidance to reduce your consumption by educating your occupants in greener habits through our energy…

Would you like to find our more about our heating and cooling networks?

Our experiences


We are delighted to support the Poitiers’s UHC in this new step to reduce its carbon footprint. I also want to hail Grand Poitiers’s urban community and all local actors who allow the development of these networks,…

Valérie Patron,

Regional Director of South-West Dalkia

These heating networks are structuring tools of energy transition in the heart of our cities. The Metropolis network is a good example, given its ambition and innovations. ADEME is proud to have a partnership with…

Arnaud Leroy,

President of ADEME

To go further

We also offer a range of additional services for improving the energy performance of your installations.

Our multi-technical performance solutions

Why not consume less and better... by doing better with less? By adapting services to meet your needs, we meet your...

Key points

Did you know? Heating is the top energy expense in France, accounting for nearly 50% of energy consumption.

France has 780 heating networks and just 23 cooling networks.

The potential is huge! The energy transition law introduced in France in 2015 aims to achieve a fivefold increase in the amount of renewable and recovered energy delivered through these networks by 2030.

The country’s multi-year energy programme aims to connect the equivalent of 3.4 million homes to a heating network by 2023.

Heating networks used to rely mainly on fossil fuels (oil, natural gas, coal, etc.), which emit large amounts of CO2. Nowadays, the focus is on renewable and recovered energy: biomass, geothermal, marine, solar, household waste, and waste heat recovered from data centres and industrial processes such as iron and steel making. In 2018, heating networks avoided some 6.13 million tonnes of CO2 emissions, the equivalent of taking 2.9 million cars off the road.

Green energy now accounts for over 50% of the energy mix in heating networks.

Furthermore, heating networks are synonymous with the creation of new jobs! Renewable and recovered energy often comes from local sources such as geothermal and marine energy sites and waste-to-energy facilities. And many local companies are involved in building each network.

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