| Topic | Source |
|---|---|
| Who qualifies | GOV.UK, Boiler Upgrade Scheme: check if you are eligible |
| Grant amounts | GOV.UK, what you can get; DESNZ notice of grant values |
| The application, consent and voucher | GOV.UK, how to apply; Ofgem property owner guidance v5.1 |
| The £9,000 rate and the off-gas test | Ofgem, Boiler Upgrade Scheme for property owners |
| 2026 rule changes | SI 2026/390 and SI 2026/1121 on legislation.gov.uk |
| Final dates | BUS Regulations 2022, regulation 15 |
| Budget and money paid | GOV.UK budget notice; Ofgem monthly scheme update |
| Statistics | DESNZ Boiler Upgrade Scheme statistics, September 2026 |
| Scotland | Home Energy Scotland |
| Advertising rules | Advertising Standards Authority |
When sources disagree
They sometimes do. The government's find-a-grant listing for the scheme still mentions an energy performance certificate, which regulations removed on 28 April 2026; GOV.UK's eligibility page and Ofgem's guidance word the retrospective time limit differently. Where that happens, this site follows the regulations and Ofgem's current guidance, and says which it is using.
How pages are kept current
Grant rules change by regulation and by notice, and Ofgem's figures change every month. Each page shows the date it was checked. When a source changes, the page is rechecked and the date updated. If you see something out of date, send it through the form with a link to the source and we will check it.
How we read a rule
For each rule we look for the most authoritative text first: the regulations on legislation.gov.uk, then the DESNZ notice of grant values, then Ofgem's guidance for property owners, then GOV.UK's summary pages. Summary pages are clearer, but they lag behind changes; the regulations are exact but hard to read. Where a summary simplifies a rule, for example by giving one time limit where Ofgem gives two, we follow the more detailed source and say so on the page.
What we do not do
We do not quote installers' prices, run eligibility decisions or claim any official status. The checker applies published rules to your answers; Ofgem makes the decision. We do not publish reviews or ratings.