Decarbonising Heat: The Role of Heat Networks Explained

Hello, Champions of Net Zero!

As we embark on the crucial journey towards achieving net zero carbon emissions, one of the most pressing challenges we face is the decarbonisation of heat. The UK is rising to this challenge, and heat networks have emerged as a powerful solution, playing a pivotal role in reducing carbon footprints while providing cost-effective energy solutions. With ambitious climate targets set by the government, expanding heat network infrastructure is essential for enhancing energy efficiency and supporting sustainable public sector development.

So, what exactly are heat networks? In simple terms, they distribute heat generated from a central source to multiple buildings through insulated pipes. This efficient method not only minimises energy waste but also eliminates the need for individual boilers or electric heaters in every building. By integrating renewable and low-carbon heat sources—such as geothermal energy, heat pumps, and waste heat recovery—heat networks are vital for reducing the UK’s reliance on fossil fuels and steering us towards a greener future.

The UK government has recognised the significance of heat networks in its quest to achieve net zero by 2050. A key objective is to reduce emissions from public sector buildings by 75% by 2037 compared to 2017 levels. Expanding heat networks will be crucial in meeting this ambitious target, offering a sustainable alternative to traditional fossil-fuel heating systems.

At Salix, we are proud to support the development of heat networks through various funding schemes. Our goal is to assist public sector organisations in connecting to new or existing heat networks, including financing the installation of the necessary infrastructure. This not only improves energy efficiency but also facilitates the decarbonisation of heat in the public sector.

We remain committed to aligning our support with other government-funded initiatives, ensuring that public sector buildings can effectively participate in heat network projects. The introduction of heat network zoning regulations is set to further stimulate investment in low-carbon heating infrastructure. This zoning approach identifies areas where heat networks represent the most effective low-carbon solution, encouraging developers and building owners to connect to these systems. By establishing designated heat network zones, the government aims to streamline planning processes, attract investment, and expand infrastructure, thereby enhancing funding opportunities for public sector organisations and aligning their projects with strategic decarbonisation goals.

In line with this, Phase 4 of the Public Sector Decarbonisation Scheme now incorporates heat network features that prioritise cost-effective carbon reduction strategies. At Salix, we administer this scheme on behalf of the Department for Energy Security and Net Zero. Applications that successfully demonstrate connectivity to heat networks are more likely to secure funding under this targeted allocation model. This approach aligns with the UK’s long-term decarbonisation strategy, ensuring that investments yield maximum carbon savings for every pound spent.

As heat network regulations evolve, it is crucial for public sector organisations to consider additional requirements to ensure compliance. Projects seeking funding may be required to demonstrate their compatibility with heat network systems, which includes technical specifications such as flow temperature settings, distribution network design, and heat interface unit configurations. These criteria are designed to ensure long-term system efficiency and align with emerging standards.

The success of heat networks hinges on collaboration among various funding schemes and stakeholders. At Salix, we understand that partnerships with local authorities, public sector organisations, and government agencies are vital for accelerating the adoption of heat networks.

Learning from Denmark’s Heat Network Expertise

Denmark has long been at the forefront of heat network innovation, offering invaluable insights that can inform the UK’s efforts to expand its own infrastructure. Recently, I had the privilege of being part of a delegation visiting Denmark to study their advanced heat network systems. This visit allowed us to gain knowledge in several key areas, including:

• Municipality-led heat strategies that empower local decision-making.
• Flexible energy systems that adapt to fluctuating energy costs and diverse heat sources.
• Integration of large-scale heat storage solutions to improve overall system efficiency.

The Danish model exemplifies the benefits of combining energy flexibility with stable costs, positioning heat networks as a competitive alternative to traditional heating methods. For instance, Copenhagen’s innovative Amager Resource Center and Høje Taastrup Heat Storage Facility have successfully integrated renewable energy sources into their heat networks, providing practical guidance for the UK’s expansion efforts.

Through our initiatives, we aim to ensure that public sector buildings can seamlessly connect to heat networks. These buildings often serve as anchor loads, stabilising system performance while enabling local communities to access sustainable heating solutions.

Raising Awareness and Building Expertise

To fully harness the potential of heat networks, we must cultivate greater knowledge and expertise among public sector building managers and within our own organisation at Salix. This involves providing training, workshops, and guidance to ensure that stakeholders are equipped to make informed decisions regarding heat network connections, technical requirements, and funding applications. By fostering a culture of knowledge-sharing, we can unlock the full potential of heat networks as a crucial decarbonisation tool.

Heat networks are not just an emerging trend; they are an established and effective solution for reducing carbon emissions, improving energy efficiency, and lowering costs. With new regulations and funding opportunities on the horizon, the UK is well-positioned to accelerate the adoption of heat networks. By prioritising collaboration, enhancing expertise, and focusing on public sector buildings, we can all play a vital role in transforming our nation’s energy landscape.

Through strategic investment and a commitment to innovation, heat networks are poised to become a cornerstone of the UK’s decarbonisation journey. We are collectively working towards achieving net zero goals and creating a sustainable future for generations to come.

For more information about our work and how you can get involved, please visit our website.

This article first appeared in the April 2025 issue of Energy Manager magazine. Stay informed by subscribing here.