Clipacore Advert 88x130mm.pdf 1 08/09/2025


HIU TEST STANDARD UPDATE DRIVES HIGHER PERFORMANCE AND SUPPORT FOR HEAT NETWORK REGULATION


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he Building Engineering Services Association (BESA) has announced an important update to its UK Heat Interface Unit (HIU) Test Standard, further strengthening performance benchmarks and supporting the


sector’s readiness for incoming heat network regulation. Version 3.1 of the BESA HIU Test Standard builds on the success of


previous editions, which have made a positive contribution to the consumer experience, improving the services of residential heat networks, and reducing carbon emission. The V3.1 standard represents another step forward for HIU performance across the sector. The changes are aligned with BESA’s core mission to improve the


performance of residential HIUs and come at a critical time as the industry prepares for the introduction of the Heat Network Technical Assurance Scheme (HNTAS), which is expected to require HIUs to meet the BESA HIU Test Regime or an equivalent standard. The timing of the update refl ects the growing importance of heat networks within the UK’s decarbonisation strategy and the need for consistent, reliable performance standards. With HNTAS set to introduce stricter requirements across the sector, the


BESA HIU Test Standard provides a proven, independently verifi ed framework that supports compliance while helping the industry adapt to a more regulated environment. BESA is also supporting industry readiness through its dedicated HNTAS


training programme, designed to help stakeholders understand and prepare for the new requirements, with further training and guidance set to be rolled out over the summer.


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INDUSTRY NEWS 09:50


CALL FOR BUILDING PERFORMANCE TESTING TO SUCCESSFULLY DELIVER UK’S WARM HOMES PLAN


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SRIA has launched its whitepaper ‘Retrofi t Testing For Warm Homes’, calling for building performance testing to be made a


core component of all Government-funded retrofi t projects. At a time of rising energy costs and growing global price volatility, the organisation warns that without proper testing, retrofi t programmes risk widespread installation failures. The publication is aimed at civil servants and policymakers involved in retrofi t, as well as housing providers, local authorities and other public bodies responsible for funding, commissioning and assuring retrofi t programmes. It supports the Government’s ambition to deliver comfortable, thermally effi cient homes for all. The UK needs to upgrade millions of homes to meet legally binding Net Zero commitments while reducing energy bills, improving comfort, and protecting occupant health. Yet recent fi ndings from large-scale domestic


retrofi t schemes have highlighted widespread installation failures, costly remediation and declining public trust. These failures are the consequence of a retrofi t process that continues to rely heavily on assumptions, visual inspections and limited oversight, rather than measured evidence of how homes actually perform. Targeted performance testing protects public


investment and ensures retrofi t delivers real- world energy savings at a time when households are increasingly exposed to volatile global energy prices. The paper examines the current quality assurance landscape, such as PAS 2035 and BS 40101, and identifi es where measurement requirements still fall short. Testing methodologies before, during and


after retrofi t work can help the country avoid the installation failures and costly remediation that have plagued previous schemes. John Taylor, publications manager at BSRIA, said: “With wholesale gas prices rising sharply, the


UK’s reliance on poorly performing homes is being exposed. This


means ensuring homes are energy effi cient is increasingly a cost-of-living issue, in addition to the health and carbon issues. “While we welcome the Warm Homes Plan,


retrofi t continues to suff er from a poor reputation, driven by repeated failures caused by inappropriate specifi cations and poor-quality workmanship. “Right now, we’re eff ectively conducting retrofi t


blind. However, by pairing the Warm Homes Plan with proper testing of airtightness, ventilation and insulation, we can make sure that any investment delivers real-world results. “The recommendations in this whitepaper


will help to avoid past mistakes and ensure the Warm Homes Plan is a success at a time when the consequences of getting this wrong are too signifi cant to ignore.”


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