The Boiler Upgrade Scheme (BUS) is a UK government grant programme that pays £7,500 towards the installation of an air source heat pump, £7,500 for a ground source heat pump, or £5,000 for a biomass boiler in your home. It's designed to accelerate the switch away from gas boilers ahead of planned future restrictions on new gas boiler installations. But with heat pumps costing £8,000–£15,000 to install and potentially higher running costs unless your home is well-insulated, the decision to switch requires careful financial analysis.
What Is the Boiler Upgrade Scheme?
- •Air source heat pump grant: £7,500
- •Ground source heat pump grant: £7,500
- •Biomass boiler grant: £5,000
- •Available in England and Wales only
- •No income limit — any homeowner can apply
- •Property must have valid EPC, with no outstanding basic insulation recommendations
How to Apply for the Grant
- •Find certified installer: mcscertified.com or GOV.UK 'Find a Tradesperson'
- •Get 3 quotes — prices vary significantly
- •Confirm installer will claim BUS grant before proceeding
- •Update your EPC before installation if it's over 10 years old
- •Tackle any outstanding insulation recommendations first
Will a Heat Pump Actually Save You Money?
- •Heat pump efficiency: ~3x more efficient than gas boiler per unit of energy
- •But electricity costs 3–4x more than gas per kWh
- •Net: broadly similar costs in well-insulated homes
- •Better savings if: good insulation, underfloor heating, solar panels
- •Typical payback period after grant: 8–15 years
Other Energy Efficiency Grants Worth Knowing
- •ECO4/GBIS: free insulation for eligible low-income/benefit households
- •Home Upgrade Grant: off-gas-grid homes, multiple upgrades
- •Smart Export Guarantee: paid for solar electricity exported to grid
- •Local authority grants: check your council website
- •Stack schemes: combine BUS + insulation grant for maximum benefit
Frequently Asked Questions
Can renters apply for the Boiler Upgrade Scheme?+
No — BUS is for homeowners only, including landlords upgrading rental properties (which can claim the grant too).
My home has no gas connection — can I still get the grant?+
Yes — in fact, the BUS is particularly beneficial for off-gas-grid homes currently on oil heating, which is expensive to run and has no government future.
Will I need to replace my radiators with a heat pump?+
Sometimes — heat pumps work best with larger surface-area radiators or underfloor heating. An installer will assess whether your existing radiators are suitable.
What about maintenance costs?+
Heat pumps generally require an annual service (~£100–150) and have fewer mechanical parts than gas boilers. Most come with 5–10 year manufacturer warranties.
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