If you’re researching boiler grants, you’ve likely seen ECO4 and the Boiler Upgrade Scheme (BUS) — but they serve slightly different purposes:
| Feature | ECO4 | Boiler Upgrade Scheme |
|---|---|---|
| Target audience | Low-income or benefit-claiming households | Homeowners upgrading to heat pumps |
| What it offers | Free boiler upgrades, insulation, heating controls | £7,500 grants for air-source heat pumps |
| Eligibility | Based on income, benefits, EPC | Based on property type and heat pump suitability |
| Fuel type | Gas boilers, insulation | Heat pump only |
If you’re on benefits or have an old gas boiler, ECO4 is your route. If you’re planning to go fully renewable, BUS is ideal.