Air Source Heat Pump Grant UK: Costs, Funding & Eligibility (2026 Guide)

Rising energy bills and the UK’s push towards net zero have put air source heat pumps firmly in the spotlight. For many homeowners, the biggest obstacle isn’t whether a heat pump makes sense environmentally — it’s the upfront cost of installation. Fortunately, the Air Source Heat Pump Grant UK scheme offers substantial government funding to bridge that gap. This guide walks through exactly how much support is available, who qualifies, what the whole process looks like from quote to installation, and whether it genuinely stacks up financially.

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What Is an Air Source Heat Pump?

An air source heat pump extracts heat from the outside air — even in cold weather — and uses it to warm your home and hot water, in much the same way a fridge works in reverse. Instead of burning gas or oil to generate heat, it moves existing heat energy using electricity, which makes it significantly more efficient than a traditional boiler. Installing one can also make you eligible for the Air Source Heat Pump Grant UK, helping to reduce the upfront installation cost while improving your home’s energy efficiency.

There are two main types recognised under UK funding schemes:

• Air-to-water heat pumps – These connect to your central heating system, typically radiators or underfloor heating, and can also provide domestic hot water. This is the most common type installed in UK homes and the one most grant schemes are built around.
• Air-to-air heat pumps – These heat (and can cool) your home directly through internal units, similar to air conditioning, but do not provide hot water.

Because they run on electricity rather than fossil fuels, heat pumps produce far lower carbon emissions on site, and running costs can be competitive with — or cheaper than — gas heating depending on your electricity tariff and how well insulated your home is.

The Boiler Upgrade Scheme: The Main Source of Funding

The headline grant available to homeowners in England and Wales is the Boiler Upgrade Scheme (BUS). Launched in April 2022 to replace the earlier Renewable Heat Incentive, BUS is administered by Ofgem on behalf of the Department for Energy Security and Net Zero, and is designed to make low-carbon heating more affordable by covering a large chunk of the installation cost upfront.

The scheme has proven popular, with well over 100,000 applications made since launch, and funding has been extended to run until 2028 with a budget running into the billions. Unlike some other energy schemes, BUS is not means-tested — homeowners of all income levels can apply, provided the property and installation meet the eligibility rules.

How Much Can You Get?

Grant amounts vary depending on the type of system you’re installing and, as of a recent government update, on what fuel your current heating system uses:

• £7,500 towards an air source or ground source heat pump for most eligible households replacing a mains gas boiler.
• £9,000 towards an air source or ground source heat pump for households currently heated by oil or LPG. This uplifted rate applies to applications from 21 July 2026 through to 31 March 2027, and reflects the fact that oil and LPG heating tends to be both more expensive and more carbon-intensive than mains gas, particularly in rural, off-grid properties.
• £2,500 towards an air-to-air heat pump.
• £5,000 towards a biomass boiler, available only for rural properties not connected to the gas grid.

Crucially, you don’t receive this money directly as a cash payment. Instead, your MCS-certified installer applies for the grant on your behalf, and the amount is deducted straight from your final installation quote — so the saving is baked into the price you’re actually asked to pay.

On top of the grant, heat pump installations (along with other qualifying energy-saving measures) currently benefit from a 0% VAT rate, which is scheduled to continue until March 2027. That’s an additional saving worth thousands of pounds on a typical installation, stacked on top of the BUS grant itself.

Read more: Solar Panel Grants UK – Government Funding, Eligibility & Savings

Who Is Eligible for the Grant?

Eligibility rules are relatively straightforward, but a handful of specific conditions catch people out. To qualify for the Boiler Upgrade Scheme, you generally need to meet the following criteria:

Property location and ownership

• The property must be in England or Wales (Scotland and Northern Ireland have their own separate schemes, covered below).
• You must own the property — this includes private landlords, not just owner-occupiers.
• The property must be an existing building. New-build homes are typically excluded, with limited exceptions for certain self-build projects.

Current heating system

• You must currently have a fossil fuel heating system (gas, oil, or LPG boiler) or electric heating without a heat pump. Homes that already have a low-carbon heating system generally aren’t eligible for further BUS funding.

Energy Performance Certificate (EPC)

• Your property needs a valid EPC, issued within the last ten years.
• This is where many applications stall: your EPC must not carry outstanding recommendations for loft or cavity wall insulation. If your current EPC flags missing insulation, you’ll usually need to install it (or get an exemption) before the heat pump grant can be approved. This requirement exists to ensure the property can actually make efficient use of a heat pump, which performs best in a well-insulated home.

Installer requirements

• The installer carrying out the work must be certified under the Microgeneration Certification Scheme (MCS) — this is non-negotiable, as uncertified installations simply won’t qualify for funding.
• The installer also needs to be a member of an approved consumer protection code, such as the Renewable Energy Consumer Code (RECC) or the HIES Consumer Code, which protects you if something goes wrong with the installation.

If you tick these boxes, the grant is available regardless of your household income, which sets BUS apart from means-tested schemes like ECO4.

How to Apply: The Actual Process

One of the more homeowner-friendly aspects of this scheme is that you don’t fill in a government application yourself. Here’s how it typically works in practice:

1. Get quotes from MCS-certified installers. It’s worth getting at least two or three quotes, as prices and equipment recommendations can vary significantly between companies.
2. The installer assesses your property. This usually includes a heat loss calculation to size the system correctly, and a check of your insulation and EPC status.
3. The installer applies for the BUS voucher on your behalf. They submit the application through the Ofgem portal using your property and EPC details.
4. Voucher approval. Once approved, the voucher is valid for a set period (generally around three months), giving you a window to complete the installation.
5. Installation goes ahead, and the grant amount is deducted directly from your final bill — you simply pay the balance.
6. The installer redeems the voucher with Ofgem after installation, so you’re not left waiting on paperwork once the work is finished.

Because the process is installer-led, choosing a reputable, MCS-certified company is the most important decision you’ll make — they handle the funding application, so any errors or delays on their end can affect your grant.

What Does an Air Source Heat Pump Actually Cost?

Even with the grant, it helps to understand the full cost picture before committing. Installation costs vary based on property size, the heat pump’s output, and the amount of additional work needed (such as upgrading radiators or pipework). Rough market pricing for a full installation, before the grant is applied, tends to fall into these bands:

Property size	Typical system size	Estimated installed cost (before grant)
1–2 bed home	5–6 kW	£8,000 – £10,000
3 bed semi-detached	7 kW	£10,000 – £12,000
4+ bed detached	11 kW+	£12,000 – £14,000

After deducting the £7,500 (or £9,000) grant, many households end up paying somewhere in the region of £2,500 to £6,500 out of pocket, depending on property size and the complexity of the install. Costs can rise further if your existing radiators need upgrading to larger models better suited to a heat pump’s lower flow temperatures, or if pipework and hot water cylinders need replacing.

It’s worth budgeting for these “hidden extras” when comparing quotes, since a cheaper headline price sometimes excludes work that turns out to be necessary once the installer surveys your home.

Running Costs: Heat Pump vs Gas Boiler

Heat pumps are significantly more efficient than gas boilers — a well-installed system can produce three to four units of heat for every unit of electricity it consumes, compared to a gas boiler’s roughly one-to-one ratio. However, because electricity is priced higher per unit than gas in the UK, the real-world savings depend heavily on:

• Your electricity tariff – Heat pump-specific tariffs, which offer cheaper off-peak electricity rates, can make a substantial difference to running costs.
• Insulation quality – A poorly insulated home will need to run the heat pump harder and longer, eroding potential savings.
• System sizing and setup – A correctly sized, well-installed system running at the right flow temperature performs far better than an oversized or poorly configured one.

For many well-insulated homes on a suitable tariff, running costs end up comparable to or lower than a gas boiler, with the added benefit of far lower carbon emissions. For homes switching from oil or LPG — both of which are typically more expensive than mains gas — the savings case is usually stronger, which is part of the reasoning behind the increased £9,000 grant for these households.

Funding Beyond England and Wales

BUS only covers England and Wales. If you’re elsewhere in the UK, different schemes apply.

Scotland: Home Energy Scotland Grant and Loan

Scottish homeowners can access the Home Energy Scotland Grant and Loan scheme, which currently offers up to £15,000 in total support for an air source or ground source heat pump — made up of a £7,500 grant plus an additional interest-free loan of up to £7,500. Rural properties may also qualify for an extra uplift on top of the standard grant, recognising the higher costs and more limited heating options often faced by off-grid rural homes.

Northern Ireland

Northern Ireland runs its own separate support arrangements outside of BUS, and funding details differ from the rest of the UK, so it’s worth checking directly with the relevant Northern Ireland energy authority for current grant levels and eligibility.

ECO4 (Energy Company Obligation)

Separate from BUS, the ECO4 scheme provides support for heat pumps (and other energy efficiency measures) specifically for lower-income and vulnerable households, or those in receipt of certain benefits. Unlike BUS, ECO4 is means-tested, and support is funded by energy suppliers rather than paid as a fixed government grant. Some households may be able to combine insulation measures funded through ECO4 with a BUS-funded heat pump, since improving insulation first can also help meet BUS eligibility requirements.

Read more: Home Upgrade Grant (HUG) UK – Eligibility, Funding & How to Apply

Is the Grant Worth It?

For most eligible households, the answer is a fairly clear yes — a £7,500 to £9,000 grant, combined with 0% VAT, can cut the effective cost of a heat pump installation by 50% or more. That said, a few practical considerations are worth weighing up:

In favour of applying:

• Substantial, non-repayable reduction in upfront cost.
• No means-testing — available to most homeowners regardless of income.
• 0% VAT adds further savings on top of the grant.
• Long-term running cost savings are realistic, especially for homes moving away from oil or LPG.
• Increases property value and EPC rating, which is increasingly relevant given tightening energy efficiency expectations for homes.

Things to weigh carefully:

• You’ll likely still need to find several thousand pounds out of pocket, even after the grant.
• Insulation requirements can mean additional upfront work (and cost) before you qualify.
• Not all homes are ideal candidates — very poorly insulated properties may see smaller running-cost savings until efficiency improvements are made.
• Voucher validity windows mean you’ll need to move relatively promptly from quote to installation once approved.
• The £9,000 oil/LPG uplift is time-limited (until 31 March 2027), so timing matters if this rate applies to you.

Getting Started

If you’re considering an air source heat pump, the most useful first step is contacting two or three MCS-certified installers for a survey and quote. A good installer will be able to tell you straight away whether your property’s EPC meets the insulation requirements, roughly what size system you’ll need, and what your final cost is likely to be after the grant is applied. Because the installer handles the grant application directly with Ofgem, there’s no separate government form for you to complete — your main job is choosing a trustworthy company and comparing quotes carefully.

Given that funding is confirmed through to 2028, and the enhanced £9,000 rate for oil and LPG homes runs only until March 2027, homeowners considering the switch — particularly those on higher-cost fuels — may find it worthwhile to start the quote process sooner rather than later.

Conclusion

The Boiler Upgrade Scheme remains the cornerstone of UK heat pump funding, offering up to £9,000 towards installation costs for eligible homes, alongside 0% VAT relief. Combined with separate, more generous support in Scotland, there’s meaningful financial help available across most of the UK for households ready to move away from fossil fuel heating. Eligibility hinges mainly on your EPC and insulation status and using an MCS-certified installer, so it’s worth getting your property assessed early. With grant funding secured until 2028, and running costs increasingly competitive with gas — especially for oil and LPG households — air source heat pumps are becoming a genuinely accessible option for a growing number of UK homeowners.

This article is for general information purposes. Grant amounts, eligibility criteria, and scheme deadlines are subject to change — always check the latest details on GOV.UK or with Ofgem before applying.