Dimplex has reinforced the shift towards proof-based specification with its Edel hot water heat pump now listed on the UK Government-backed Energy Technology List (ETL) – currently the only dedicated hot water heat pump to achieve inclusion.

The listing confirms the Edel range (170, 200 and 270-litre models) meets strict energy performance criteria set out by the scheme, giving specifiers and developers a recognised benchmark at a time when compliance, efficiency and real-world performance are under increasing scrutiny.

As Part L requirements evolve and the transition to all-electric buildings accelerates, technologies that can demonstrate verified performance are moving higher up the decision-making agenda. ETL inclusion provides assurance, helping reduce risk in specification and supporting long-term energy and carbon targets.

Edel is designed to meet this need, using energy extracted from external air to deliver efficient domestic hot water across both new-build and retrofit applications. Its compact, self-contained design allows for straightforward installation in space-constrained settings, without adding unnecessary system burden.

David Patrick, Head of Specification Marketing at Dimplex, said: “Being the only hot water heat pump currently listed on the Energy Technology List is significant because it reflects where the market is heading. Specifiers are being asked to prove performance, not just promise it. Verified technologies give that confidence, particularly as regulation tightens and expectations increase.”

That confidence is already being demonstrated on site – at the Chateau Mews development, delivered with Keepmoat – Edel units were specified as part of a fully electric solution designed to meet modern energy standards and remove reliance on gas.

Installed within standard utility cupboards in each apartment, the compact units addressed space constraints while delivering an efficient, low-carbon hot water system. The approach also supported compliance with updated Part L requirements, where domestic hot water is an increasingly important part of overall energy performance.

The project reflects a wider shift towards decentralised, apartment-level solutions that simplify installation, improve controllability and support compliance without increasing system complexity.

As the industry continues to adapt to evolving regulation and Net Zero targets, Dimplex says independently verified technologies will play a growing role in helping specifiers make confident, well-informed decisions.

David added: “Low-carbon solutions now need to be proven in real-world conditions, not just on paper and that’s where technologies like Edel are making a difference. As the industry moves towards higher performance standards and greater electrification, having that level of confidence in specification will only become more important.”

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