The results of the largest research project ever carried out on electrical heating systems under controlled conditions have been revealed.
The study at the Energy House 2.0 facility at the University of Salford has revealed that air source heat pumps are capable of providing energy-efficient warmth for new homes for less than £2 a day.
Funded by the UKRI’s Greater Manchester Innovation Accelerator Programme and working alongside Bellway, Barratt Redrow and Saint-Gobain UK, the Future Homes project tested 14 different heating systems over 12 months to see which will heat homes the best at the lowest cost.
The systems tested at Energy House 2.0 covered a range of technologies including Infrared heat panels, air source heat pumps, underfloor heating, skirting board heating and traditional radiators, and also looked at two different heating patterns to replicate the typical way people live in their homes in the UK.
The key findings from the research are:
- Air Source Heat Pumps can cost as little as £1.84 on a typical winter day to heat a home and are more efficient than current gas boilers
- The most common method of heating homes in the UK is currently gas boilers, which are designed to reach temperatures of up to 70 °C quickly and be used for short periods of time that fit around the typical consumers’ lifestyle (morning and evening heating). During the extreme winter condition test the electrified heating systems did not perform well when used in the typical way that consumers with gas boilers would use heating. Consumers with the new heating systems would need to adjust to using them in a more constant way to get the best heat at the most efficient cost
The findings will help new buyers, existing homeowners, renters and landlords to understand the most efficient ways to heat homes when gas boilers begin to be phased out in new homes from 2025. Existing homes have until 2035 to replace gas boilers.
Richard Fitton, professor of building performance at the University of Salford, said: “Without the unique facilities we have here at Salford, it would take years to deliver these results that we have achieved in just a few months of testing on each home.”
“Energy House 2.0 allows for a comparison between heating technologies at constant extreme temperatures, which up to this moment has not been possible and our results represent unique research. These insights will be invaluable as we try to reduce the carbon emitted in heating our homes, whilst ensuring people are warm and comfortable in their homes without paying too much on their bills.”
Bellway’s house, named The Future Home, tested two air source heat pumps, including the UK’s first roof-mounted prototype, along with underfloor, infrared and ambient heating, and mechanical heat recovery ventilation.
Bellway’s home demonstrated that underfloor heating and air source heat pumps work well together, while Infrared heating could be used more widely in flats and maisonettes, where ASHPs are difficult to install.
Saint-Gobain partnered with Barratt Redrow in constructing eHome2 which looked at how to deliver zero carbon housing at scale using off-site lightweight construction solutions. eHome2 piloted the use of next-generation heating and ventilation technologies as well as smart technology.
The eHome2 has a host of innovative solutions from Saint-Gobain including its weberwall brick, a high-performing timber frame system from its Scotframe brand and its Pasquill Posi-JoistTM floor cassettes that allow for the integration of Mechanical Ventilation & Heat Recovery systems (MVHR).
Oliver Novakovic, director of technical & innovation at Barratt Redrow, said: “The Energy House 2.0 research is one of the most important R&D projects that Barratt Redrow has ever undertaken. It will inform us about the homes that we build in the next 20, 50 and 100 years. We will see more extreme weather events and we need to ensure that the fabric of the homes we build, and the heating and cooling emitters that we fit, provide the most temperature-efficient and cost-effective outputs for residents.”
Jamie Bursnell, head of technical and innovation for Bellway, said: “The heating tests at Energy House 2.0 have accelerated our understanding of how new homes can be heated through electric sources. The comparison of different combinations of heating technologies working in a controlled environment has highlighted some highly efficient systems. We will now refine and test further, and the research will inform our work with new technologies on the live developments where these are already being trialled.”
Mike Chaldecott, Saint-Gobain UK’s CEO, said: “This research comes at a critical time. Never before have real homes been tested under such precise conditions to help inform us about how to build homes that will perform in the climates we face today and a generation and beyond from now. The way we build is undergoing rapid change – from heavy, carbon-intensive materials, to lighter, more sustainable building solutions, with large parts of buildings built in factories and assembled on-site. This research is critical to understanding how we can do that at the scale we need in the future, cost-effectively, with greater levels of productivity while being sure of how those new building solutions perform in a changing climate.”
