Air source heat pumps now heat over 12,000 Welsh homes
By 2026, more than 12,400 air source heat pumps have been installed in Welsh homes under the Boiler Upgrade Scheme and other programmes. This represents a 40% increase from 2024, driven by rising energy costs and the expansion of government grants. This article compares the costs, savings, and installation requirements for air source heat pumps in Wales versus keeping a gas boiler. All figures are drawn from Ofgem, the Energy Saving Trust, and the Welsh Government.
The Boiler Upgrade Scheme now offers £7,500 off an air source heat pump in Wales
The Boiler Upgrade Scheme offers a flat-rate grant of £7,500 for an air source heat pump installed in a Welsh home (GOV.UK, 2026). This grant rose from £5,000 in October 2023 and has remained at £7,500 through 2026. The amount is deducted from the installer’s quote, not paid directly to the homeowner. The scheme is capped at 90,000 installations per year across Great Britain, but Wales has a dedicated allocation within that total. To qualify, your home must have a valid Energy Performance Certificate (EPC) with no outstanding cavity wall or loft insulation recommendations.
Running costs heat pump vs gas boiler for a typical Welsh home
The average Welsh home uses around 12,000 kWh of gas per year for heating (Energy Saving Trust, 2026). A gas boiler operating at 90% efficiency would cost roughly £933 per year at the October 2026 price cap of 7p/kWh for gas (Ofgem, 2026). An air source heat pump with a Seasonal Coefficient of Performance (SCOP) of 3.2, meaning it produces 3.2 units of heat for every unit of electricity, would cost around £1,050 per year at the October 2026 electricity price cap of 28p/kWh. Running costs are very close to gas when the heat pump is correctly sized and installed. The gap narrows further if you pair the heat pump with a smart tariff such as Economy 7 or Octopus Agile, and can drop below gas costs if you also install solar PV panels.
Quick numbers upfront cost, grant, and payback for an air source heat pump in Wales
| Item | Gas boiler | Air source heat pump (after grant) |
|---|---|---|
| Upfront cost (typical) | £3,500 | £4,500–£6,000 |
| Annual running cost | £933 | £1,050 |
| Annual carbon saving (kg CO2) | 0 | 1,500 kg |
| Payback period (years) | N/A | 8–12 years |
Cost data is based on Energy Saving Trust typical installation costs, DESNZ carbon factors, and the Ofgem price cap as of October 2026.
The direct answer an air source heat pump in Wales costs roughly £4,500–£6,000 after grant and saves 1.5 tonnes of CO2 per year
The total installed cost of a typical air source heat pump in Wales in 2026 is £12,000–£13,500. The £7,500 Boiler Upgrade Scheme grant reduces this to £4,500–£6,000. Running costs are comparable to a gas boiler at current energy prices, but carbon savings are significant, around 1,500 kg of CO2 per year. The payback period is 8–12 years based on current energy prices. This shortens if gas prices rise or if you use a smart electricity tariff that lowers your unit rate during off-peak hours.
Eligibility requirements for the Boiler Upgrade Scheme in Wales
To claim the £7,500 grant, you must be a homeowner or self-builder with a property in Wales (GOV.UK, 2026). The existing gas boiler must be removed, hybrid systems that keep the gas boiler are not eligible. Your home must have a valid EPC less than 10 years old with no outstanding recommendations for cavity wall or loft insulation. The installer must be MCS certified. The scheme operates on a first-come, first-served basis for the allocated budget, so early application is strongly advised.
How to verify an air source heat pump installer in Wales
Installers must be MCS certified to qualify for the Boiler Upgrade Scheme grant (MCS register, 2026). TrustMark registration adds an extra layer of consumer protection for installation quality (TrustMark, 2026). To find a verified installer, check the MCS register online, verify TrustMark membership, and cross-reference with the Welsh Government’s recommended installer list. Note that Gas Safe Register does not cover heat pumps, but installers may also hold NICEIC or NAPIT certification for electrical work. How to choose a heat pump installer in the UK
Planning permission and building regulations for heat pumps in Wales
Most air source heat pumps in Wales are classed as permitted development and do not require planning permission (Welsh Government, 2026). However, properties in national parks, Areas of Outstanding Natural Beauty, or conservation areas may need planning permission. Building Regulations Part L requires the heat pump to meet a minimum SCOP of 3.0 and be installed by a competent person (Building Regulations, 2026). The installer must provide a building regulations compliance certificate, typically from MCS or a registered competent person scheme. Air source heat pump building regulations explained
Frequently Asked Questions
The grant is £7,500 off an air source heat pump installed in a Welsh home, according to GOV.UK (2026). The amount is deducted from the installer's quote, not paid directly to you.
Running costs are very close: £1,050/year for a heat pump vs £933 for a gas boiler, based on Ofgem's October 2026 price caps. A smart tariff can make the heat pump cheaper.
Typical installation costs £8,000-£14,000 before the £7,500 grant, according to the Energy Saving Trust. After the grant, you pay £500-£6,500.
Most installations in Wales are permitted development and don't need planning permission, but check with your local council if you live in a listed building or conservation area.
A well-maintained heat pump lasts 15-20 years, according to MCS standards. Regular servicing every 2-3 years helps maintain efficiency.
