Heat Network Design
ABUK Group designs fourth and fifth generation heat networks for residential and mixed-use developments across London. CIBSE CP1 compliant. HNTAS validated.
Fourth and fifth generation heat network design for London’s residential and mixed-use developments. CIBSE CP1 compliant, HNTAS validated, and designed to decarbonise not just to connect.
At ABUK, heat network design is not a separate specialism bolted on at the end. It is embedded into the MEP strategy from the moment the energy concept is formed.
Heat networks are becoming a central feature of London’s residential and mixed-use development landscape — driven by planning policy, decarbonisation targets, and the practical need to provide low-carbon heat and hot water at scale across complex multi-tenure
schemes. Getting the design right from the outset is critical. An undersized or poorly specified network leads to poor resident experience, high operating costs, and retrofit challenges that are expensive to resolve.
ABUK has experience across the full development cycle of heat network projects: from initial feasibility and energy concept through to detailed hydraulic design, HNTAS validation, heat meter specification, and support during procurement and construction. We design systems that are technically robust, commercially viable and aligned with the Heat Network (Metering and Billing) Regulations and the emerging Heat Network Zoning requirements under the Energy Act 2023.
Our heat network designers work alongside our MEP engineers and sustainability team, so that heat network strategy is never developed in isolation from the wider building services design. Pipe routing, energy centre sizing, substation layouts and controls philosophy are all coordinated as part of a single, integrated design — not assembled from separate reports.
What this means in practice?
Feasibility and concept:
Evaluate heat network viability from RIBA Stage 1, assess demand profiles, connection feasibility, and alignment with planning and sustainability requirements.
Fourth and fifth generation design:
Design ambient loop and low-temperature heat networks that support decarbonisation, reduce heat loss, and enable individual dwelling-level heat pumps.
CIBSE CP1 and HNTAS compliance:
Deliver heat network designs and validation reports in accordance with CIBSE Code of Practice CP1 and the Heat Network Technical Assurance Scheme (HNTAS).
Integrated delivery:
Coordinate heat network design with the MEP, utilities and sustainability workstreams to ensure a coherent, buildable and compliant energy
solution across the whole project.
SERVICES LIST:
Feasibility and Strategy
Heat network feasibility assessment
Demand modelling and load profiling
Energy centre and plant room sizing
Network topology and route options appraisal
Business case and whole life cost assessment
Alignment with planning policy and GLA energy requirements
Fourth and Fifth Generation Heat Networks
Ambient loop (fifth generation) heat network design
Low-temperature district heating (fourth generation) design
Individual dwelling heat pump integration
Shared ground loop array design
Network temperature optimisation
Decarbonisation pathway assessment
Detailed Design
Hydraulic network design and pipe sizing
Energy centre detailed design
Substation and HIU specification
Heat meter selection and specification
BMS and controls philosophy
Heat network operation and maintenance manual
Compliance and Validation
CIBSE CP1 compliance review
HNTAS — Heat Network Technical Assurance Scheme validation
Heat Network (Metering and Billing) Regulations compliance
Heat Network Zoning readiness assessment (Energy Act 2023)
Planning energy strategy and GLA heat network policy compliance
BREEAM and Part L interface
The regulatory landscape for heat networks in the UK is changing significantly. The Heat Network Zoning provisions under the Energy Act 2023, combined with the ongoing roll-out of HNTAS and evolving GLA energy policy, mean that developers and housing associations need heat network advice that is both technically rigorous and commercially grounded. ABUK’s heat network service is delivered by engineers who understand both the design detail and the policy context — and who are already part of
your project team, not an external appointment made too late to influence the outcome.