HEATING, VENTILATION & SERVICES 53 Architects need to network
Josh Collins at Altecnic Ltd explains the vital role of heat networks in the UK’s journey towards net zero and how architects could be key to ensuring their adoption.
T
he UK’s Energy Act 2023 paved the way for a new regulatory framework for heat networks; they have a vital
role in the UK’s journey to net zero, but performance across the sector has been uneven. Currently being developed by the Department for Energy Security and Net Zero (DESNZ), the Heat Network Technical Assurance Scheme (HNTAS) will introduce mandatory technical standards that ensure heat networks deliver consistent performance, reliability, and effi ciency across the UK’s built environment. Historically, many systems were designed without cohesive guidance, leading to high heat losses, ineffi cient operation, and variable comfort for residents. HNTAS has been developed to change that by defi ning measurable design and performance standards for every part of a heat network, from initial generation through to delivery in individual dwellings. The framework will establish minimum expectations for insulation, fl ow temperatures, commissioning, and maintenance, giving architects and engineers a clear benchmark for compliance and quality.
Why HNTAS matters to architects While mechanical and electrical (M&E) consultants have traditionally taken the lead on heat network design, HNTAS will bring architects into the process earlier, and more centrally. Design coordination will now infl uence compliance outcomes. Design decisions such as plant room location, riser routes, service zones, and facade penetrations all affect pipework length, insulation continuity, and heat loss. By planning these elements from the outset and working closely with M&E specialists, architects can help ensure their developments meet HNTAS effi ciency requirements and avoid costly redesigns later in the project. In practical terms, this means integrating energy centre layouts, secondary network pathways, and consumer connection points within the architectural design to optimise
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effi ciency and space use. Early stage design collaboration will be key to achieving the performance metrics the scheme demands.
A performance-led approach At the heart of HNTAS lies a shift from theoretical compliance to verifi ed performance, where accountability is taken. Networks will be assessed at several stages of their lifecycle: •
Before design – ensuring concept proposals meet the required performance intent
• • •
Before construction, validating that technical specifi cations align with HNTAS criteria
Before operation – confi rming commissioning quality and control functionality
Post-operation – reviewing performance data after two years of operation to verify real world outcomes.
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For architects, it signals a more active role in ensuring the success of low carbon energy systems – design coordination will now infl uence compliance
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