Lower temperatures, higher heat pump efficiency
# Heat Pump Efficiency Gap: Real-World Performance Lags Expectations
A comprehensive UK study found that installed heat pumps are delivering significantly lower seasonal performance factors (SPF) than their theoretical ratings suggest. Researchers from Oxford University and Heat Pump Monitor analyzed operational data across numerous installations and identified a substantial difference between laboratory specifications and actual household performance. The research points to commissioning practices—how systems are initially set up and configured—as a critical factor in closing this gap.
For energy coordinators and grid operators, this finding has direct relevance to system planning and dispatch strategies. Heat pump performance directly affects electricity demand patterns, thermal storage potential, and the ability to provide flexibility services. If installations operate below rated efficiency, forecasting models and demand-response coordination become less predictable. Better commissioning could improve the consistency of heat pump behavior across networks, making integration with variable renewable generation and storage systems more reliable.
The practical takeaway is straightforward: installer training and standardized commissioning protocols appear to offer measurable efficiency improvements without requiring hardware changes or capital investment. This suggests that operational optimization—rather than equipment replacement—may be the near-term lever for improving heat pump performance at scale across existing installations.