Data centre waste heat could warm millions of UK homes

New analysis from EnergiRaven, a UK provider of energy management software, and Viegand Maagøe, a Danish sustainability and ESG consultancy, suggests that waste heat from the next generation of UK data centres could be used to heat more than 3.5 million homes by 2035, provided the necessary heat network infrastructure is developed. The research estimates that projected growth in data centres could generate enough recoverable heat to supply between 3.5 million and 6.3 million homes, depending on data centre design efficiency and other technical factors. The report argues that without investment in large-scale heat network infrastructure, much of this heat will be lost. The study highlights a risk that the UK will expand data centre and AI infrastructure without making use of the waste heat produced, missing an opportunity to reduce household energy costs and improve energy resilience. “Our national grid will be powering these data centres - it’s madness to invest in the additional power these facilities will need and waste so much of it as unused heat, driving up costs for taxpayers and bill payers,” argues Simon Kerr, Head of Heat Networks at EnergiRaven. “Microsoft has said it wants its data centres to be ‘good neighbours’ - giving heat back to their communities should be an obvious first step.” Regional opportunities and proximity to housing The research points to examples where data centres are located close to both new housing developments and areas affected by fuel poverty. Around Greater Manchester, for example, 15,000 homes are planned in the Victoria North development, with a further 14,000 to 20,000 planned in Adlington. The area also includes more than a dozen existing data centres, with additional facilities planned. According to the analysis, these sites could potentially supply heat to nearby new housing, reducing the need for individual gas boilers and supporting lower-carbon heating. Moreover, the study maps how similar patterns could be replicated across the UK, linking waste heat sources with residential demand through heat networks. Using waste heat for space heating is common in parts of northern Europe, particularly in Nordic countries. There, waste heat from sources such as data centres, power plants, incinerators, and sewage treatment facilities is often connected to district heat networks, supplying homes via heat interface units instead of individual boilers. In the UK, a number of cities have been designated as Heat Network Zones, where heat networks have been identified as a lower-cost, low-carbon heating option. From 2026, Ofgem will take over regulation of heat networks and new technical standards will be introduced through the Heat Network Technical Assurance Scheme, aimed at improving consumer and investor confidence. Heat networks, regulation, and policy context The Warm Homes Plan includes a target to double the proportion of heat demand met by heat networks in England to 7% by 2035, with longer-term ambitions for heat networks to supply around 20% of heat by 2050. The plan also includes funding support for heat network development. However, Simon argues that current policy does not fully reflect the scale of opportunity from large waste heat sources, continuing, “Current policy in the UK is nudging us towards a patchwork of small networks that might connect heat from a single source to a single housing development. If we continue down this road, we will end up with cherry-picking and small, private monopolies, rather than national infrastructure that can take advantage of the full scale of waste heat sources around the country. “We know that investment in heat networks and thermal infrastructure consistently drives bills down over time and delivers reliable carbon savings, but these projects require long-term finance. "Government-backed low-interest loans, pension fund investment, and institutions such as GB Energy all have a role to play in bridging this gap, as does proactivity from local governments, who can take vital first steps by joining forces to map out potential networks and start laying the groundwork with feasibility studies.” Peter Maagøe Petersen, Director and Partner at Viegand Maagøe, adds, “We should see waste heat as a national opportunity. In addition to heating homes, heat highways can also reduce strain on the electricity grid and act as a large thermal battery, allowing renewables to keep operating even when usage is low and reducing reliance on imported fossil fuels. "As this data shows, the UK has all the pieces it needs to start taking advantage of waste heat - it just needs to join them together. With denser cities than its Nordic neighbours and a wealth of waste heat on the horizon, the UK is a fantastic place for heat networks. It needs to start focusing on heat as much as it does electricity - not just for lower bills, but for future jobs and energy security.”

Carrier launches CDU with 2°C ATD

Carrier, a manufacturer of HVAC, refrigeration, and fire and security equipment, has introduced a new coolant distribution unit (CDU), designed to support the growing use of liquid cooling in UK data centres while improving energy performance, resilience, and space utilisation. The Carrier CDU is intended to help operators manage higher rack densities and increasing cooling demands. It is designed to support liquid-cooled IT environments and provide greater control over energy use and system uptime. As liquid cooling becomes more widely adopted to meet efficiency targets, the CDU enables deployment at scale through management of secondary coolant loops. Carrier says this can help reduce pumping energy and optimise heat removal across varying load conditions. Thermal performance and system efficiency The CDU uses modular heat exchangers that can deliver approach temperatures as low as 2°C, compared with more typical 4°C systems. According to Carrier, this can enable up to 15% chiller energy savings, allowing more electrical capacity to be allocated to IT loads rather than cooling. Oliver Sanders, Data Centre Commercial Director UK&I, Carrier HVAC, notes, “Data centre leaders across the UK are focused on increasing capacity without increasing risk. “This new Carrier CDU supports that goal by giving operators greater thermal stability, more flexibility in system design, and better visibility of cooling performance. The result is improved energy efficiency and smoother scalability as liquid cooling demand grows.” The CDU is designed for use in mission-critical environments and includes redundant pumps and power supplies to support continued operation during maintenance or unexpected events. Intelligent controls manage fluid temperatures and flow rates in real time, with the aim of maintaining stable conditions for high-density servers while reducing energy consumption. Integration, scalability, and monitoring Carrier states that the CDU is designed for simplified integration into existing facilities, allowing liquid cooling to be introduced with minimal disruption. The product range includes multiple unit sizes from 1.3 to 5 MW, enabling operators to align cooling capacity with current and future high-density requirements. The system is intended to support direct-to-chip cooling as well as mixed cooling environments. Carrier says it is designed to maintain stable performance under fluctuating workloads and higher ambient temperatures. “Liquid cooling adoption is accelerating, and operators want systems that deliver both efficiency and certainty,” Oliver continues. “With this Carrier CDU, customers can integrate high-density workloads confidently, knowing their cooling system is designed to maximise uptime, efficiency, and long-term value.” The CDU integrates with Carrier’s control platforms to support centralised monitoring, performance optimisation, and energy management. This is intended to help data centre teams track cooling trends, respond to load changes, and plan capacity more effectively. The Carrier CDU forms part of Carrier’s QuantumLeap portfolio of data centre technologies. For more from Carrier, click here.

FTTH Council Europe welcomes the DNA

The FTTH Council Europe, a European industry association promoting fibre-optic broadband deployment across Europe, has said it welcomes the Digital Networks Act, as put forward by the European Commission. The mission of the FTTH Council Europe is to see the widespread availability and use of FTTH (Fibre to the Home) in Europe as quickly as possible. It therefore maintains that it is important to ensure that the regulatory framework incentivises investment and fosters effective competition, adding that that these two objectives must remain at the core of any access policy. The FTTH Council Europe positively welcomes the proposal for the switch-off of copper networks. The process, it claims, strikes the right balance between the need to incentivise the take-up of future-proof networks, the necessity to consider national specificities, and avoiding unintended consequences for consumers. The association says it is convinced that copper switch-off is an important driver for investments and that it will positively contribute to the competitiveness of the EU, supporting the digital transition and the enhancement of the Single Market. Therefore, it invites the co-legislators to support the European Commission approach on this topic. The FTTH Council Europe further considers that the current regulatory framework has delivered positive outcomes. It believes maintaining the SMP process in the proposed DNA is central to preserving competition and demonstrates the Commission’s commitment to a stable and predictable regulatory environment, something critical to supporting investors and enabling the continued development of sustainable competition. The Council also notes the proposed harmonised access products but believes that any remedies should start by being tailored to the specific realities of national and market contexts, which can vary significantly between countries and market segments. National Regulatory Authorities (NRAs), it propounds, are best positioned to define, where necessary, appropriate SMP obligations that reflect the unique characteristics of their markets. The FTTH Council Europe also acknowledges the provisions on security and resilience in the DNA that recognise the critical importance of communications infrastructure. However, the body invites the co-legislators to make clear that any obligation that may arise should be adequately supported by national and European resources in the next MFF and not create excessive burdens for a sector that is investing heavily in the achievement of the Digital Decade targets. There are other aspects that need refinement, according to the FTTH Council Europe, and there are certain issues where it believes a different approach should be taken, not least regarding the availability of licence-free spectrum for RLAN. The FTTH Council Europe says it looks forward to working constructively with co-legislators to share its insights and experience in refining this proposal.

STULZ updates CyberRack Active Rear Door cooling

STULZ, a manufacturer of mission-critical air conditioning technology, has launched an updated version of its CyberRack Active Rear Door, aimed at high-density data centre cooling applications where space is limited and heat loads are increasing. The rear-mounted heat exchanger is designed to capture heat directly at rack level, using electronically commutated fans to remove heat at the point of generation. The updated unit is intended for use in both air-cooled and liquid-cooled data centre environments. Integrated sensors monitor return and supply air temperatures within the rack. Cooling output is then adjusted automatically in line with server heat load, aiming to maintain consistent thermal performance as workloads fluctuate. Designed for high-density and retrofit environments Valeria Mercante, Product Manager at STULZ, explains, “The tremendous growth of high-performance computing and artificial intelligence has driven server power densities higher than ever, creating significant heat challenges. “With data centre space often at a premium, the CyberRack Active Rear Door is precision engineered to deliver maximum cooling capacity in a footprint depth of just 274mm. "Delivering up to 49kW chilled water cooling with large heat exchanger surfaces and EC fans, it also supports higher water temperatures and can extend free cooling hours. This helps reduce overall energy consumption and operating costs.” The compact footprint means the unit can be installed without rack repositioning, making it suitable for retrofit projects and sites with limited floorspace. Custom adaptor frames are available to support a range of rack sizes and deployment models, including standalone use, supplemental precision air conditioning, and hybrid configurations alongside direct-to-chip liquid cooling. For maintenance, the system includes a two-step door opening of more than 90°, providing access to fans and coils. Hot-swappable axial fans with plug connectors are also designed to simplify servicing and reduce downtime. Differential pressure control adjusts fan speed in line with server airflow requirements, while low noise operation is also specified. The CyberRack Active Rear Door includes the STULZ E² intelligent control system, featuring a 4.3-inch touchscreen interface. The controller supports functions such as redundancy management, cross-unit parallel operation, standby mode with emergency operation, and integration with building management systems. Valeria continues, “The updated CyberRack Active Rear Door embodies our commitment to providing air conditioning solutions that combine cutting edge technology with intelligent design, user friendliness, energy efficiency, flexibility, and reliability. “In environments where space is tight, heat loads are high, or there’s no raised floor, these advanced units can deliver highly efficient cooling, regardless of the server load.” For more from STULZ, click here.

RWE sustainably powers Global Switch’s London DC

RWE, a German renewable energy company, has signed an eight-year power purchase agreement (PPA) with Global Switch, an owner, operator, and developer of data centres in Europe and Asia-Pacific. Under the terms of the agreement, Global Switch will source electricity produced from RWE’s Brechfa Forest West onshore wind farm to power its data centre in the heart of London’s Docklands. From January 2026 until 2033, RWE will supply a total of 70 gigawatt hours of clean electricity per year. The Brechfa Forest West onshore wind farm is located in southwest Wales and was commissioned in 2018. It comprises 28 turbines and has a generation capacity of 57.4 megawatts. Ulf Kerstin, Chief Commercial Officer at RWE Supply & Trading, notes, “In view of the ongoing digitalisation and the increasing use of artificial intelligence in almost all areas of life, the number of data centres and their energy requirements are growing. "Some data centre operators are already relying on the use of low-carbon electricity from RWE, and we are delighted to have gained Global Switch as another partner.” Peter Domeney, COO at Global Switch, comments, “Our agreement with RWE is a critical next step on our journey to purchasing 100% renewable energy by 2030 and to the setting of new standards for what a sustainable, environmentally-conscious data centre can look like. "It’s an agreement that brings together the forests of Wales and the most powerful, most advanced AI and high-performance compute deployments in the world.” Wind power from Wales to London Global Switch’s London data centre, set to benefit from this agreement, is located in the heart of the city’s business district, with access to 224 Mega Volt Ampere (MVA) - or approximately 224 MW - of secured power and currently undergoing a programme of densification and expansion. Last year, it was selected by CoreWeave to host one of Europe’s largest deployments of NVIDIA H100 and H200 GPUs, as well as being the site of the company’s liquid cooling showcase - a presentation of the latest liquid cooling technologies, some of which had never before been deployed in Europe. Global Switch is targeting 100% renewable energy by 2030, and annualised power usage efficiency (PUE) of 1.2 across its European sites. In 2025, its emissions reduction targets were approved by the Science Based Targets initiative and its sites were inducted into the voluntary European Code of Conduct for Energy Efficiency in Data Centres initiative. RWE says it is investing billions of euros in expanding its generation portfolio, particularly in offshore and onshore wind, solar energy, and battery storage. This is complemented by its global energy trading business. The company says that, thanks to its "integrated portfolio of renewables, battery storage, and flexible generation, [it] is well positioned to meet the growing global demand for electricity," which is being driven by the increasing use of artificial intelligence and further electrification.

McCarthy tops out NV12 project at Vantage’s campus

General contractor McCarthy Building Companies recently completed the topping out milestone for hyperscale data centre provider Vantage Data Centers’ second of four planned data centres on its NV1 Campus, located outside of Reno in Storey County, Nevada, USA. With representatives from Storey County and Vantage leadership in attendance, the project marked major progress on the NV12 facility, the second 64-megawatt (MW) data centre on the campus. Phase I of the campus provides hyperscalers and large cloud providers with 128 MW of combined critical IT capacity across its NV11 and NV12 facilities. The campus has reportedly created more than 1,200 local construction jobs and generated local economic impact. McCarthy notes that, just recently, the campus reached more than 1.1 million labour hours on site since breaking ground in May 2024, with zero lost-time incidents through what it describes as a "campus-wide commitment to safe construction practices and innovative methods." Austin Osborne, Storey County Manager, explains, “Vantage Data Centers, our developer partners; McCarthy Building Companies, the general contractor on site; and the Storey County team - from Community Development and Planning to Business Development and the Fire Protection District - have worked closely to move this project forward. "It’s a strong example of effective collaboration, and we’re grateful for the long-term opportunities this project will continue to bring to our community.” The 260,000ft² (24,155m²), two-storey NV12 facility utilises liquid-to-liquid cooling, similar to NV11, that operates on a closed loop chilled water system to properly cool the systems while requiring only an initial fill. This more sustainable design is common across Vantage’s data centres, with the company noting it represents its "commitment to sustainable operations and long-term reliability." Continued construction during ongoing operation Jared Carlson, Senior Vice President at McCarthy Building Companies, comments, “This project has demonstrated an incredible commitment to sustainability, safe construction, and operations, and has created a strong sense of community within Storey County. "Vantage and our design-build partners have been instrumental in creating a campus that will provide significant economic impact to the region and will continue to sustain technological growth in the years to come.” Following turnover of NV11, NV12 will begin to turn over phased portions of the facility beginning in December 2027, allowing customers to begin operations prior to final completion in early 2029. As construction progress continues, McCarthy will be piloting the use of an HP Robot to map out the layout of NV12’s walls, blockouts, and backing. Following the robot’s success on some of McCarthy's healthcare projects, the team will use the robot to layout all elements on the concrete slab, based on the existing Building Information Model (BIM) layout. This method allows for greater efficiency and precision as the facility’s core components have already been digitally modelled to the site’s conditions.Both NV11 and NV12 are being constructed by McCarthy in a design-build effort with Corgan, serving as the campus architect. Key design-build trade partners include: Amfabsteel, Chavez-Grieves, Rosendin Electric, Apollo Mechanical Contractors, Salas O’Brien, Integrated Fire and Security Solutions, Cosco Fire Protection, and Wood Rogers. For more from Vantage, click here.

Warnings of drone‑enabled cyber threats to critical infrastructure

As drone technology becomes more sophisticated and accessible across the globe, researchers from Innovation Central Canberra (ICC) at the University of Canberra have teamed up with Australian tech company DroneShield to understand the risk profile of cyber attacks to critical infrastructure. With the rapid expansion of drone tech reshaping Australia’s security landscape, Defence, national security, and critical infrastructure are facing new challenges; meeting these requires capability that is not only technologically advanced, but also assessed and refined through rigorous, independent research environments. “We know how drones have changed traditional warfare, but are we oblivious of the role they play in cyber security?" questions Professor Frank den Hartog, Cisco Research Chair in Critical Infrastructure at the University of Canberra. "That's a worry, and an opportunity for our drone and cyber industry.” The project began with a team comprising Professor den Hartog and ICC students - namely Andrew Giumelli and Simone Chitsinde - undertaking targeted analysis and interviewing critical infrastructure operators to further understand the cyber threat environment through the use of drones. Increasing threats to critical infrastructure In the independent report, researchers found no recorded domestic cyber incidents using drones to date, but also noted that limited drone detection capabilities and awareness, minimal government guidance, and rising drone use are creating vulnerabilities. This highlights a gap in reporting on drone-enabled cyber threats in Australia. The findings warn that the combinations of steadily increasing drone capability, limited awareness across industries, and a lack of targeted government guidance is creating a widening gap. The report emphasises that drones are no longer emerging technology. Their capability, affordability, and accessibility have increased dramatically in recent years, and malicious actors are experimenting with drone-borne cyber techniques overseas. Within the next five years, as drone and cyber capabilities continue to evolve, operators may need to reassess the likelihood and relevance of drone-enabled cyber threats. Professor den Hartog continues, “This research highlights the need for greater education, more industry collaboration, improved knowledge sharing, and broader consideration of counter-drone capabilities across critical infrastructure sectors. “We need to encourage operators to periodically and critically review how drones are used within their operations, assess the cybersecurity implications of increased adoption, and explore strategies to integrate drone risk into existing security and resilience programs.” DroneShield’s engagement with ICC highlights the broader importance of research-industry collaboration in strengthening countries' sovereign capabilities. Acknowledging this, both organisations say they are exploring opportunities to continue the partnership.

Report: How Slough became Europe's largest DC cluster

Kao Data, a developer and operator of data centres engineered for AI and advanced computing, has published a new report examining how Slough has evolved into Europe’s largest data centre cluster - and the UK’s de facto AI Growth Zone (AIGZ) - hosting over 675 Megawatts (MW) of hyperscale data centre capacity, while contributing more than 14,000 jobs and over £30 million in annual business rates to the local economy. The new report, ‘The Quiet Revolution: How Data Centres Remade Slough and Secured the UK’s Digital Future’, was released just as the UK marks 12 months since the inception of the Government’s AI Opportunities Action Plan, which proposed the creation of AIGZs to accelerate infrastructure deployments in support of the country’s AI and economic ambitions. Kao Data’s new report, produced with support from Carbon3IT and Parisi, demonstrates that such a growth zone already exists in Slough, operating at around 1GW of capacity and providing a proven blueprint for regional, economic growth. Further, it highlights the positive contribution that data centres - often incorrectly maligned as an industry which creates minimal jobs and economic impact - can have on a local community. For example, the report reveals that data centres replaced declining manufacturing employment in the Slough region on a near one-to-one basis, and created approximately 8,000 construction jobs between 2010 and 2025, alongside hundreds of permanently skilled operational roles. Other key findings • Slough hosts more than 30 operational data centres with around 1GW of total capacity, including 675MW of hyperscale facilities serving UK availability zones. • The cluster supports approximately 14,000 jobs across direct, indirect, and induced employment. • Data centre operators contribute over £30 million per year in local business rates. • 95% of Slough’s data centre electricity demand is backed by 100% renewable procurement. • The Simplified Planning Zone (SPZ) framework generated £18 million in council revenues between 2014 and 2024. • Nearly 2.7 million people with engineering, construction, and telecommunications experience live within one hour of the Slough Trading Estate. Spencer Lamb, MD & Chief Commercial Officer at Kao Data, explains, “Slough shows, in very real terms, what happens when infrastructure is developed with planning certainty, energy availability, and a skilled workforce, and our new report demonstrates that data centres have delivered long-term job creation, significant tax revenues, and a resilient foundation for the UK’s AI and digital economies. “We firmly believe that data centres are a force for good in this country, providing well-paid, varied, and future-proof employment, economic regeneration to post-industrial areas, and, through operator-led energy procurement, are helping transition the UK to a green economy.” With Slough and West London’s grid constraints well documented, the economic case for developing additional regional hubs in the UK has never been more urgent. Moreover, with data centres now designated as Critical National Infrastructure (CNI), the report concludes that the UK must create additional clusters across the country to propel regional economic growth and provide security diversity. With Slough proving what's possible when the conditions and local governance are right, the task now is to build on that success deliberately, regionally, and at scale - starting with the UK’s AIGZs and existing city tech communities like Greater Manchester - so that Britain's AI and digital economies can be powerful and resilient. For more from Kao Data, click here.

Fluke Networks launches CertiFiber Max fibre tester

Fluke Networks, a manufacturer of network certification and troubleshooting tools, has launched CertiFiber Max, a third-generation optical loss test set designed for high-density data centre fibre testing. The tester is built on the Versiv platform and integrates with LinkWare software. Fluke Networks states that CertiFiber Max can certify up to 24 fibres in under one second, addressing growing testing demands as fibre density increases in AI- and cloud-driven environments. As data centre architectures evolve, contractors are under pressure to certify more fibres within tighter performance margins. Fluke Networks notes that many existing tools either limit fibre counts or rely on fan-out cables and adapters, increasing testing time and complexity. Designed for high-density fibre certification CertiFiber Max supports 12-, 16-, and 24-fibre MPO connectors, as well as 16- and 24-fibre MMC connectors, using field-replaceable UniPort adapters. These adapters are designed to connect directly to multiple connector types and can be replaced or upgraded on site, extending the working life of the tester. The company says this approach allows technicians to adapt to changing connector standards without replacing test equipment, while also protecting tester ports during use in demanding environments. Vineet Thuvara, Chief Product Officer at Fluke Corporation, comments, “CertiFiber Max reflects our belief that trust in data centre operations starts at the physical layer. Built on the proven Versiv platform, it delivers native 24-fibre support for high-density networks.” As fibre counts continue to rise, the company positions its CertiFiber Max as a tool designed to support both current installations and future requirements, including emerging connector formats such as MMC. Charlie Stroup, Applications Engineering Manager at US Conec, notes, “As MMC deployments continue to expand rapidly, Fluke’s CertiFiber Max plays a critical role in supporting reliable testing for next-generation AI networks.” The system measures optical loss, length, and polarity across multiple fibres in under a second and uses the one-jumper reference method recommended by industry standards and manufacturers. For more from Fluke Networks, click here.

Motivair introduces scalable CDU for AI data centres

Motivair, a provider of liquid cooling systems for data centres, owned by Schneider Electric, has announced a new coolant distribution unit designed to support high-density data centre cooling requirements, including large-scale AI and high-performance computing deployments. The new CDU, MCDU-70, has a nominal capacity of 2.5 MW and is intended for use in liquid-cooled environments where compute density continues to increase. Motivair says the system can be deployed as part of a centralised cooling architecture and scaled beyond 10 MW through multiple units operating together. According to the company, the CDU is designed to support current and future GPU-based workloads, where heat output is significantly higher than traditional CPU-based infrastructure. It notes that rack power densities in AI environments are expected to approach one megawatt and above, increasing the need for liquid cooling approaches. Designed for scalable, high-density cooling Motivair states that the new CDU integrates with Schneider Electric’s EcoStruxure platform, allowing multiple units to operate as part of a coordinated system. The design is intended to support phased expansion as cooling demand grows, without requiring major redesign of the wider plant. Rich Whitmore, CEO of Motivair by Schneider Electric, comments, “Our solutions are designed to keep pace with chip and silicon evolution. Data centre success now depends on delivering scalable, reliable infrastructure that aligns with next-generation AI factory deployments.” The CDU forms part of Schneider Electric’s wider liquid cooling portfolio, which includes systems ranging from lower-capacity deployments through to multi-megawatt installations. Motivair says the units are designed as modular building blocks, enabling operators to select and combine systems based on specific performance and redundancy requirements. The system is manufactured through Schneider Electric's facilities in North America, Europe, and Asia, and is intended to provide high flow rates and pressure within a compact footprint. The company adds that the design supports parallel filtration, real-time monitoring, and integration with other cooling components to support efficient operation across the data centre. The MCDU-70 is now available to order globally. For more from Schneider Electric, click here.