A quiet revolution in home heating is struggling to take hold. The government’s Boiler Upgrade Scheme (BUS), launched with much fanfare in May 2022, has now passed a significant milestone, receiving over 100,000 applications. The programme had one of its strongest months on record in October 2025, with over 4,000 submissions. Applications for 2025 alone have already shattered the previous year’s total, suggesting a record-breaking year. At first glance, this surge in demand for grants of up to £7,500 appears promising. However, beneath this veneer of progress lies a much harsher reality: the market remains hopelessly adrift from the official target of 600,000 heat pump installations per year by 2028. Current installation rates hover around a mere 36,000 annually, a paltry 6% of the goal.
The fundamental issue is that financial incentives, while necessary, are entirely insufficient to overcome the deep-seated practical and economic weaknesses of the technology from a British homeowner’s perspective. The primary and most frequently cited drawback is the exorbitant running cost. Heat pumps are powered by electricity, and the UK’s electricity prices are notoriously high relative to gas. The price per kilowatt-hour for electricity is typically three to four times that of natural gas. This brutal arithmetic means that, despite impressive Coefficients of Performance (COP), the actual bills for running an air-source heat pump in a standard British home can be shockingly high, especially during a cold snap when the unit’s efficiency drops. The promise of long-term savings is often vaporised by the immediate and palpable increase in quarterly energy statements, a fact repeatedly highlighted in consumer reports and forums.
Compounding the cost problem is the substantial and disruptive upfront installation. Even with the maximum £7,500 grant, the remaining cost to the homeowner can easily run into five figures, particularly for older properties which require significant upgrades to their heating distribution systems. Most British homes use compact, high-temperature radiator systems designed for gas boilers. A heat pump operates most efficiently at lower temperatures, which often necessitates the installation of larger radiators or, ideally, underfloor heating—a prohibitively expensive and invasive retrofit for most. This renders the technology a non-starter for a vast swathe of the housing stock, particularly Victorian and Edwardian terraces. Industry insiders privately concede that without a massive, state-led programme of home insulation and heating system overhaul, the 600,000 target is pure fantasy.
Furthermore, a lingering crisis of confidence surrounds installation quality and after-sales service. The industry has suffered from a gold-rush mentality, with a shortage of properly skilled installers leading to a proliferation of substandard work. There is no single, mandatory nationwide accreditation standard, leading to a wild west of qualifications. Stories abound of systems that are incorrectly sized, poorly commissioned, or simply never work as advertised, leaving homeowners with a cold house and a gigantic bill. The Microgeneration Certification Scheme (MCS) is a benchmark, but its enforcement is patchy. This lack of regulatory teeth has created a market where consumers are justifiably wary, fearing they will be left with an expensive, malfunctioning white elephant. The recent extension of the BUS scheme to include ‘heat batteries’ and air-to-air units is seen by some critics as a distracting complication rather than a solution to these core reliability and trust issues.
From a purely technical standpoint, heat pumps also face a perception problem regarding their performance in the British climate. While they are proven technology in the consistent cold of Scandinavia, the UK’s damp, mild winters present a different challenge. The units must frequently defrost themselves during chilly, humid weather, a process that consumes extra energy and can lead to noticeable fluctuations in heating output. The physical units, particularly the external fans, are also criticised for being overly bulky and noisy, causing disputes in densely packed urban areas and suburbs—a key reason for their notably low uptake in London boroughs compared to more rural southern counties.
The government’s own policy chaos has not helped. The sudden announcement of the termination of the long-standing Energy Company Obligation (ECO) scheme by March 2026 has created a cliff edge in support for low-income households. While the Warm Homes Plan budget has been increased, the transition has injected severe uncertainty. There is persistent speculation within the trade press, never officially confirmed but widely believed, that BUS criteria may be narrowed to focus only on the poorest households. This has created a perverse incentive to apply now, further inflating application numbers without guaranteeing a corresponding rise in well-installed, effective systems.
The British heat pump transition is stalling because the technology, in its current form and within the current market structure, is a poor fit for the average UK home. It is too expensive to run against cheap gas, too disruptive and costly to install properly, and too often installed by an under-regulated industry that erodes consumer trust. The government’s target of 600,000 installations by 2028 is now widely viewed within the energy sector as utterly unattainable. Achieving any meaningful uptake will require more than just grants; it demands a fundamental rethinking of energy pricing—likely through a carbon tax on gas—a rigorous national installer licensing scheme, and a massive, publicly funded programme of home energy efficiency retrofits. Without these, the heat pump will remain a niche product for the wealthy and the environmentally devout, and the UK’s decarbonisation targets for home heating will go permanently unmet.
