One of the greatest challenges in retrofitting listed buildings is integrating modern, low-carbon heating systems that actually work. Moving from fossil-fuelled space heating and hot water to an all-electric heat pump system is key to achieving huge carbon reductions. As our grid electricity continues to decarbonise, emissions from all-electric systems will reduce significantly over the next decade.
If we can successfully retrofit more historic properties to achieve similar heating performance as modern new build developments, we will be taking another important step towards reaching the goal of net zero carbon.
However, challenges include the poor low fabric performance of historic buildings - resulting from poor insulation, thermal bridging and air tightness – and, importantly, avoiding the potential harm to the character of the building through upgrades.
We believe, that through proper early-stage consultation and focusing the design team’s attention on detailed services coordination, historic buildings can avoid the continued use of high temperature gas-fired heating systems. This approach enables historic buildings to transition to clean energy solutions while maintaining the desired performance.
Case Study: Albion Street
Albion Street is an excellent example of a successful low-carbon retrofit that not only reduces carbon emissions but preserves the buildings original character.
Working alongside Tigg & Coll Architects, the aim was to restore this house on a historical mews site in central London house to its former glory, improve comfort and significantly cut carbon emissions.
Inside this home, the interiors reflect simplicity and elegance, with clean lines and minimalist finishes. Yet behind the scenes, a different story unfolded. Using fully developed 3D Revit modelling, we meticulously coordinated the MEP systems to navigate both existing and new structural elements, ensuring the integrity of the listed building was preserved.
Another notable feature is the seamless integration of fan coil units behind wardrobes. This approach maintains the streamlined aesthetic while optimising thermal comfort and occupant satisfaction.
Previous refurbishments had left behind existing building services equipment, but it was evident that design considerations had not been prioritised during their installation. Our goal was to deliver functional yet aesthetically unobtrusive solutions that allowed residents to enjoy the space without visible services.
As we navigated the complexities of heritage requirements while fitting out the mechanical and electrical systems, we also faced the challenge of addressing fire damage that was part of the building’s history.
How big is the carbon saving potential?
As mentioned, transitioning to all electric solutions will create significant carbon saving in future. National Grid predicted in their 2024 Future Energy Scenario (FES) that the carbon intensity of their electricity would fall to around 50gCO2/kWh by 2040 in their worst-case scenario. Assuming a 300% heat pump efficiency, compared to 90% for a gas boiler, the savings offered by a heat pump retrofit would be a staggering 93% reduction for space heating and hot water generation.
Paving the Way to a Zero-Carbon Future
Albion Street is more than just a successful retrofit—it’s a testament to what’s possible when expertise, technology, and design converge. If 100% electric heating can be used complex listed property, we are one step closer to making zero-carbon buildings a reality. With the right expertise, a sustainable future for all buildings is within reach.