"Heat pumps installed in UK homes are cutting energy bills by more than £200 a year when they are properly designed and set up, according to a major new study. Researchers analysing real-world data from hundreds of households found the systems are performing far better than earlier trials suggested, delivering lower costs, higher comfort, and reduced carbon emissions. The findings challenge lingering doubts about whether heat pumps can work efficiently in Britain's existing housing stock."
"The key factor behind the improved performance was quality installation and setup. Researchers found that the most efficient systems were properly sized for the home, rather than oversized, and ran continuously at lower temperatures instead of switching on and off in short bursts. Efficient systems typically operated with radiator temperatures of 35°C to 40°C, far lower than the 50°C to 60°C used by gas boilers. Lower temperatures allow heat pumps to extract and deliver heat more smoothly,"
Real-world data from hundreds of UK households using ground and air-source heat pumps shows systems performing nearly 40% more efficiently than earlier trials. Well-optimised heat pumps save around £224 per year compared with gas boilers while delivering improved comfort and a much smaller carbon footprint. Homeowners voluntarily shared data via HeatpumpMonitor.org covering a wide range of housing types, ages, and heat pump models. Key drivers of higher performance include correct sizing rather than oversizing, continuous operation at lower temperatures, and proper control calibration. Typical radiator flow temperatures of 35°C–40°C enable smoother heat extraction and lower electricity use than 50°C–60°C boiler temperatures.
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