The £7,500 Boiler Upgrade Scheme makes heat pumps financially viable for millions of UK homes. But the maths varies enormously depending on what you currently heat with, how well insulated your home is, and which region you're in. Scotland and Wales have additional schemes. Off-gas areas have a much stronger case. Start with the calculator.
BUS grant for air-source or ground-source heat pump. Open to all homeowners in England and Wales — no income test. Confirmed running until 2030.
BUS grant for air-to-air heat pumps and heat batteries — added late 2025. Suits flats, smaller homes, and properties without space for a hot water cylinder.
Typical seasonal efficiency of a UK air-source heat pump. For every 1 kWh of electricity used, you get 3–4 kWh of heat — making it cheaper to run than direct electric and often comparable to gas.
The strongest case for heat pumps. Running cost savings of £400–£900/year are typical replacing oil, versus £100–£300 replacing gas. If you're off the gas grid, run the numbers first.
The sweet spot for heat pump performance. EPC D can work but you'll see lower SCOP and higher running costs. EPC E or below — improve insulation first. ECO4 may fund that free (closes Dec 2026).
Additional regional schemes: Home Energy Scotland (grants + 0% loans), Nest Wales (free upgrades for eligible households), NI Affordable Warmth. Check the grants checker for your area.
Heat demand by property type, SCOP-based running cost, grant deducted, payback vs your current fuel. 7 inputs.
BUS + ECO4 + Warm Homes Local Grant + Nest + Home Energy Scotland — what you qualify for in your area.
Grant amounts, eligibility, MCS requirements, application process and the gotchas nobody mentions.
The £2,500 air-to-air grant changes the choice for many homes. Decision tree for which suits yours.
Each page pre-fills the local fuel type, flags regional grant schemes, and explains what the BUS grant means for your specific area — including where off-gas properties have a much stronger financial case.