Government funding under the Warm Homes Plan is being directed at both existing heat networks that are performing poorly and new low-carbon schemes still in development. In an announcement on 20 May, the Department for Energy Security and Net Zero said £15.6 million will go to upgrade 94 older heat networks across England and Wales, while four projects in England will share a further £25 million for new infrastructure. The department said the package should benefit more than 10,000 residents as well as hospitals, charities and other large users connected to communal systems. The policy case set out by ministers is straightforward: if networks lose less heat, use equipment more efficiently and give households better control over consumption, operating costs should fall and service quality should improve.
Heat networks supply multiple buildings from a central source rather than relying on an individual boiler or heat pump in every property. In practice, they can use conventional plant, electric heat pumps or recovered waste heat from sources such as factories, data centres or energy-from-waste facilities. That model can offer lower-carbon heating at scale, but only if the network itself is well maintained. Older systems can become expensive to run when pipework leaks, insulation is poor or in-home interface units no longer regulate heat properly. The government’s announcement is therefore focused not only on expanding heat networks, but also on correcting weaknesses in legacy systems that have left some residents facing high costs and uneven performance.
According to the Department for Energy Security and Net Zero, the Heat Network Efficiency Scheme funding will pay for work such as replacing leaky pipes, improving insulation and installing new interface units in homes. Those changes are technical, but the practical effect is clear: less wasted heat in the distribution system, tighter control of indoor heating and a lower risk of consumers paying for energy that never reaches the property. Among the projects named by government, £1.2 million will go to improve the older heating system serving three 1960s high-rise blocks in Salford. Solihull will receive £2.1 million to upgrade five heat networks serving 484 residents, while two networks in Camden will receive £2.1 million for efficiency works affecting 358 residents. These examples show the scheme’s immediate emphasis on underperforming urban networks where relatively modest engineering work may produce visible gains for households.
Separate capital support through the Green Heat Network Fund is intended to expand newer low-carbon systems. In Bristol, £13.5 million has been allocated to extend the Bristol City Leap heat network, with the department saying the project will use heat pumps to provide fossil fuel-free heating to more homes and businesses. Government also said the expansion is expected to support more than 1,000 jobs, apprenticeships and work placements. In Rochdale, £1 million will support a heat network that captures heat from a sewer running through the town. The planned users include colleges and schools, Rochdale Infirmary, businesses and residential buildings, including social housing. For policy officials, that is a useful illustration of how network design is increasingly tied to local heat sources that would otherwise be unused.
Two further schemes show how the Green Heat Network Fund is being used to back place-based energy infrastructure. In London, £8.6 million will support the next phase of the King’s Cross Heating and Cooling Network, which the government said already serves more than 1,700 homes and 44 buildings using heat pumps. In Warwickshire, £2.2 million will help develop a network in Atherstone using waste heat from the Baddesley Energy from Waste facility to supply low-carbon heating to 1,700 homes. Taken together, the four projects indicate that ministers are backing several technical routes rather than a single model. Heat pumps, sewer heat recovery and waste-heat capture all appear in the current round. That matters because the economics of heat networks depend heavily on local geography, anchor demand from public or commercial buildings and access to a reliable low-cost heat source.
The announcement also sits within a longer funding commitment. In January, the government said the Warm Homes Plan would provide £195 million a year for the Green Heat Network Fund and £15 million a year for the Heat Network Efficiency Scheme through to 2029/30. This latest allocation is therefore part of an established spending line rather than a one-off intervention. Ministers are linking the policy to three objectives at once: lower bills, reduced fuel poverty and progress towards clean power by 2030. Martin McCluskey, the minister for energy consumers, said recent instability linked to conflict in the Middle East had underlined the case for reducing exposure to fossil-fuel price shocks. In policy terms, the message is that heat networks are now being presented not only as a decarbonisation tool, but also as part of energy security planning.
The wider significance is that government is treating heat networks as consumer infrastructure that requires both expansion and repair. New systems may help decarbonise dense urban areas, but the credibility of the sector also depends on fixing older networks that have delivered poor value or weak service. Support for pipe replacement, insulation and control systems is therefore as important as headline investment in new generation assets. Chris Unsworth, head of heat networks at the Association for Decentralised Energy, welcomed the funding and argued that it should reach key community institutions such as hospitals and charities. His response also pointed to the next policy question: whether government will move beyond targeted rounds and address the full stock of legacy heat networks. For households and organisations already connected, the immediate test will be delivery on the ground and whether the promised engineering upgrades translate into lower bills and a more dependable service.