The figures represent a 27% rise on 2024 and continue a multi-year growth trend, supported by an increase in domestic manufacturing, which now accounts for 36% of all units sold. Every major category expanded, from air-to-water monoblocs to ground and water source systems, although the overall pace of growth has eased compared with the 56% surge recorded the previous year.

Despite the positive trajectory, the sector remains well short of the momentum needed to reach the Government’s ambition of 450,000 annual installations by 2030. Meeting that target would require compound annual growth of around 33%. HPA UK’s latest modelling suggests that scaling hydronic heat pump deployment in line with the Carbon Budget Growth and Delivery Plan could add £14 billion in gross value to the UK economy over the decade and cut reliance on imported gas by more than half by 2035.

HPA UK chief executive Charlotte Lee said the data reinforces the central role of heat pumps in delivering the Warm Homes Plan, but warned that progress depends on sustained policy clarity. She called for the publication of the Future Homes and Building Standard Regulations and urged the Government to consult on rebalancing electricity and gas prices to remove a key barrier to adoption. European Heat Pump Association director general Paul Kenny echoed the importance of stable policy support, noting that the UK’s approach could serve as a model for EU markets, while highlighting the need to address the electricity to gas tax ratio to ensure heat pumps remain cost-competitive.

With the Warm Homes Plan reaffirming the Government’s commitment to the technology, industry bodies are pressing for rapid action to unlock the next phase of market growth.