By Abbas Nazil
Copenhagen in Denmark is advancing a new phase of its climate strategy by focusing on flexible heating systems that can reduce emissions and improve energy efficiency across the city.
The initiative, known as Flexumers4Future, is part of the Climate-KIC NetZeroCities Pilot Cities Programme and aims to transform buildings from passive energy consumers into active participants in balancing heat demand and supply.
This approach is intended to support Copenhagen’s long-term goal of becoming a climate-positive city by 2035 while strengthening the resilience and affordability of its district heating system.
City officials explained that although Copenhagen already relies heavily on renewable energy sources such as wind power and district heating, a significant portion of urban energy is still consumed through heating systems that operate without flexibility.
By adjusting when and how heat is used in buildings, the city hopes to reduce peak energy demand, avoid reliance on carbon-intensive backup plants, and improve integration between heating and electricity networks.
The project will test flexible heating solutions in municipally owned buildings, privately operated commercial properties, and residential buildings managed by individual owners.
It also includes the installation of digital control systems that allow real-time communication between buildings and the district heating network.
Officials believe that if successfully scaled, the system could reduce peak heat demand by 10 to 15 megawatts while maintaining comfort levels for users.
The initiative builds on earlier pilot projects in Copenhagen that tested energy flexibility in selected buildings and explored how thermal storage and smart controls can optimize consumption patterns.
According to city energy planners, even simple digital upgrades in heating systems can generate energy savings of between 3 and 7 percent, while more advanced predictive systems using weather data can further improve efficiency.
The project is being implemented through cooperation between the Copenhagen city administration and the local district heating company, alongside multiple municipal departments responsible for innovation, climate strategy, and urban development.
However, officials acknowledge that regulatory constraints and data-sharing limitations present challenges to full-scale integration of the system across the city.
Despite these challenges, Copenhagen continues to position itself as a European leader in urban climate innovation, using its district heating network as a testing ground for scalable solutions that can be replicated in other cities across Europe.
The broader aim of the initiative is to ensure that energy systems become more adaptive, less carbon-intensive, and better aligned with fluctuating renewable energy supply, particularly as Denmark continues its transition toward a fully sustainable energy model.
City authorities also emphasize that collaboration between government, utilities, building owners, and citizens is essential to achieving long-term climate targets and maintaining energy security.
As the project develops, Copenhagen is expected to share its findings with other European cities through the NetZeroCities framework, contributing to wider efforts across the continent to modernize heating systems and accelerate climate neutrality goals.
