£2,500 for an air-to-air heat pump
Air-to-air heat pumps can get a £2,500 Boiler Upgrade Scheme grant in England and Wales from 28 Apr 2026, if the heat pump heats the whole home and hot water comes from an eligible non-fossil source (Ofgem BUS guidance, checked 25 Sep 2026). MCS certified air-to-air installers: 0 (checked 25 Sep 2026).
125,321 vouchers
Four conditions on a whole-home air-to-air job
- §3.80. Will the heat pump heat the whole home on its own?
- §3.81. Does hot water come from the heat pump or another eligible non-fossil source?
- §3.95. Is a fossil-fuel boiler staying in the system?
- §3.93. Is the product and the installer on an MCS certification path?
| Technology | Applications | Vouchers issued | Redemptions paid |
|---|---|---|---|
| air-to-water | 147,883 | 122,699 | 91,320 |
| air-to-air | 145 | 0 | 0 |
| ground source | 2,425 | 2,052 | 1,586 |
| shared ground loop | 75 | 46 | 37 |
| biomass | 608 | 524 | 421 |
| all technologies | 151,136 | 125,321 | 93,364 |
DESNZ Boiler Upgrade Scheme statistics, August 2026 · May 2022 to August 2026 · n=125321 · Ofgem administrative counts in the published ODS, Table 1.2A · updated 25 Sep 2026 · version grant-w2d-1 · CSV of the values on this page
BUS-AAHP · p.6 summary table and §§3.80–3.96 · checked 25 Sep 2026. £2,500 for air-to-air heat pumps (AAHP) (in residential properties only) Source
Full engine wording and the measurement caveat
Worked whole-home example from evaluate_bus: institutionally_pending. By the rules, this arrangement is eligible for the £2,500 air-to-air BUS grant, but no MCS-certified air-to-air installation pathway was found in our catalogue on the date checked — the grant is legally available; a certified route to claim it is not yet confirmed. Air-to-air applications since April 2026: 145.
When does the £2,500 apply?
The worked example passes the heating, hot-water and fossil-fuel checks and still has no MCS-certified air-to-air installer in this catalogue.
£2,500
| Check | In this example | Clause |
|---|---|---|
| Heats the whole home | yes | §3.80 |
| Hot water from an eligible non-fossil source | yes | §3.81 |
| No disallowed fossil arrangement | yes | §3.95 |
| MCS product and installer | no confirmed installer in the catalogue | worked example |
Ofgem BUS installer guidance v5.1 · applications on or after 28 Apr 2026 · n=1 · contract_engine.evaluate_bus with the four published predicates set to yes and installer status zero confirmed · updated 25 Sep 2026 · version grant-w2d-1 · CSV of the values on this page
Full engine wording and the measurement caveat
By the rules, this arrangement is eligible for the £2,500 air-to-air BUS grant, but no MCS-certified air-to-air installation pathway was found in our catalogue on the date checked — the grant is legally available; a certified route to claim it is not yet confirmed.
Better than a grant slogan: the £2,500 rule, the voucher counts and the publication date are on this page.