If you’re fed up with paying through the nose for traditional heating, checking your Boiler Upgrade Scheme (BUS) eligibility is your first real step toward a cheaper, cleaner gaff. The BUS is a dead-handy UK government grant that slashes the steep upfront price of ditching old fossil-fuel boilers in favor of eco-friendly low-carbon alternatives.
However, you can’t just pick any random heat pump and expect free cash. The property, the kit, and the tradesperson all need to tick specific boxes. Here is the straightforward, no-nonsense breakdown of how to qualify for the scheme.
What Is the Boiler Upgrade Scheme?
The Boiler Upgrade Scheme is an Ofgem-backed capital grant designed to help property owners in England and Wales move away from gas, oil, and LPG heating.
Rather than sending cash directly to your bank account, the funding goes straight to certified installers. They handle the voucher paperwork on Ofgem’s portal and knock the discount directly off your final installation bill before you pay.
Keep in mind: You cannot use this scheme to swap an old gas boiler for a new gas boiler. The funding is strictly reserved for approved renewable heating tech.
Which Technologies Can Qualify?
To secure BUS funding, your replacement system must be an approved, highly efficient renewable unit:
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Air Source Heat Pumps (ASHPs): Pull warmth straight out of the outside air—even when it’s proper brass monkeys outside—and pump it into your central heating and hot water.
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Ground Source Heat Pumps (GSHPs): Tap into natural geothermal energy trapped underground using boreholes or surface pipe loops. They offer top-tier efficiency year-round.
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Biomass Boilers: Burn organic wood pellets. Under current rules, these are strictly limited to rural, off-grid properties where heat pumps aren’t technically feasible.
| System Type | Grant Value | Ideal Property Profile |
| Air Source Heat Pump | £7,500 | Terraced, semi-detached, & detached homes |
| Ground Source Heat Pump | £7,500 | Properties with a garden, driveway, or field for piping |
| Biomass Boiler | £5,000 | Off-grid, rural gaffs with ample space for fuel storage |
Who Can Qualify for the Boiler Upgrade Scheme?
The scheme is available across England and Wales to several key groups:
Homeowners & Owner-Occupiers
Whether you own a detached house, semi-detached, terraced home, or a eligible flat, you can claim the grant to upgrade your primary residence.
Private Landlords
Landlords renting out domestic properties can use the grant across their rental portfolio. It’s a cracking way to boost your EPC ratings before tighter rental efficiency laws hit.
Self-Builders
If you are building a brand-new home from scratch for your own use, you qualify for the scheme as long as the build meets standard MCS installation rules.
What Are the Main Eligibility Requirements?
To guarantee your project gets approved without any proper grief, your installation must satisfy five non-negotiable rules:
1. You Must Use an MCS-Certified Installer
You can’t just get a mate from the pub to fit your heat pump. The installer must be registered with the Microgeneration Certification Scheme (MCS) to apply for and redeem the voucher.
2. No Outstanding EPC Recommendations
Your property’s Energy Performance Certificate (EPC) cannot have any unfulfilled recommendations for loft or cavity wall insulation. If it does, you must get those sorted (or get an updated EPC issued) before the grant gets signed off.
3. Complete Fossil-Fuel Replacement
The new system must replace an existing fossil-fuel setup (gas, oil, LPG, or electric storage heaters) and be sized to cover 100% of your space heating and hot water demand. Hybrid systems (keeping your gas boiler as a backup) get zero funding.
4. Technical Performance Standards
The installed heat pump must hit strict minimum efficiency targets—such as a Seasonal Coefficient of Performance (SCOP) of at least 2.8—to guarantee lower running costs.
How Can You Apply?
Getting your grant sorted is surprisingly hassle-free because your installer does the administrative heavy lifting.
Does Your Home Need Good Insulation First?
Heat pumps operate differently from conventional boilers—they produce steady, background heat rather than short, scorching blasts of hot water. Therefore, thermal efficiency matters.
Before installation day, it pays to check:
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Loft Insulation: Ensure your loft is insulated to at least 270mm depth.
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Wall Cavities: Fill empty cavity walls to stop heat leaking through exterior brickwork.
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Radiators: Upsize key radiators to larger double-panel units so they emit plenty of heat at lower flow temperatures.
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Draught-Proofing: Seal up leaky doors, windows, and suspended floorboards.
Draught-proofing and insulating first means you can fit a smaller, cheaper heat pump that burns less electricity to keep you warm.
What Costs Are Not Covered?
While a £7,500 voucher takes a massive bite out of the bill, you’ll still need to cover any remaining balance. Extra project costs can include:
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Radiator upgrades or underfloor heating extensions.
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A new unvented hot water cylinder.
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Upgraded pipework or electrical consumer unit tweaks.
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Groundworks or trenching (for ground source units).
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Removing and disposing of your old boiler.
Always request an itemised quote that explicitly separates the total job price, the £7,500 grant allowance, and the final balance payable out of your pocket.
Common Reasons to Check Eligibility Carefully
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Unapproved Trades: Paying a deposit to an uncertified installer will void your grant eligibility entirely.
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Assuming Hybrid Systems Qualify: Keeping a gas boiler alongside a heat pump gets you zero funding under BUS rules.
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Ignoring Insulation EPC Flags: Voucher applications get paused if your EPC shows missing cavity wall or loft insulation.
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Relying on Outdated Figures: Always verify current grant values (£7,500 for heat pumps) directly with your installer or on Ofgem’s official site.
Frequently Asked Questions
1. Who is eligible for the Boiler Upgrade Scheme?
Homeowners, private landlords, and self-builders in England and Wales qualify, provided the property meets basic EPC insulation rules and the work is done by an MCS-certified installer.
2. Can homeowners get a heat pump grant?
Yes. Homeowners replacing an old fossil-fuel heating system can get an upfront £7,500 grant toward an Air Source or Ground Source Heat Pump.
3. Does an old boiler automatically qualify for the scheme?
No. Having an old boiler isn’t enough on its own—the proposed replacement must be a qualifying low-carbon system, and your property must meet scheme rules.
4. Can private landlords apply for the Boiler Upgrade Scheme?
Yes. Private landlords owning domestic rental properties in England and Wales can claim BUS grants to upgrade their properties.
5. Do I need an approved installer?
Yes. The scheme runs strictly through MCS-certified installers who manage the voucher process and subtract the discount from your invoice.
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