Does this air-to-air heat pump qualify for £2,500?
The £2,500 air-to-air grant is available in England and Wales when the Ofgem tests pass, and this catalogue has 0 confirmed MCS air-to-air installers on 25 Sep 2026. If the pump only heats one room, the whole-home heating test fails and the grant does not apply.
computed
Worked example, already calculated
Rules met on the worked example · certified path 0
Four Ofgem tests, scored separately from the installer path
Worked example: residential house in England, the pump covers all space heating, hot water is covered by an eligible arrangement, no disallowed fossil hybrid, and the previous system is an eligible one being replaced. Engine result: rules met, certified path 0.
MCS’s finder, checked 25 Sep 2026: “There are currently no installers certified for this technology. Air-to-air heat pumps are a new technology that will be available to installers later this year.”
Scotland is a different scheme. Home Energy Scotland excludes air-to-air.
| Test | Entered | Clause |
|---|---|---|
| Heat pump covers full space heating | yes | §3.80 |
| Eligible arrangement covers hot water | yes | §3.81 |
| No disallowed fossil arrangement | yes | §3.95 |
| Eligible product and installer path | 0 confirmed in this catalogue | catalogue count, separate from the legal tests |
| Previous heating system eligible | yes | §3.37–3.38, also applied by the checker |
heat_pump_covers_full_space_heating · §3.80 · checked 25 Sep 2026. The heat pump system must have sufficient kilowatt thermal capacity to provide 100% of the space heating needs of the eligible property. Source
eligible_arrangement_covers_DHW · §3.81 · checked 25 Sep 2026. The BUS-funded heat pump must be capable of providing the full space heating and hot water heating demand to a property, either on its own or in combination with supplementary heating appliances Source
no_disallowed_fossil_arrangement · §3.95 · checked 25 Sep 2026. Fossil fuel hybrids are not eligible. Heat pumps installed alongside a separate fossil fuel boiler, including “retrofit hybrids,” … are ineligible for BUS. Source
eligible_product_and_installer · §3.93 · checked 25 Sep 2026. While the scheme regulations do not prohibit exhaust air-to-air heat pumps (EAAHPs), BUS eligibility requires installations to be MCS certified. As EAAHPs cannot currently be MCS certified, they are not eligible for support under the scheme at this time. Source
BUS amount · p.6 summary table · checked 25 Sep 2026. £2,500 for air-to-air heat pumps (AAHP) (in residential properties only) Source
HES · eligible costs, air-to-water/ground/water-to-water heat pump section · checked 25 Sep 2026. We will not cover: … Air to air heat pumps. Source
MCS finder · find-an-installer, air-to-air · checked 25 Sep 2026. There are currently no installers certified for this technology. Air-to-air heat pumps are a new technology that will be available to installers later this year. Source
Next pages
Ofgem Boiler Upgrade Scheme installer guidance v5.1; Home Energy Scotland terms; MCS find-an-installer · checked 25 Sep 2026 · n=0 confirmed MCS air-to-air rows in the installer catalogue · evaluate_bus / evaluate_grant in scripts/contract_engine.py · updated 25 Sep 2026 · version 1.0.0 · CSV of the values on this page
Source detail
https://www.ofgem.gov.uk/sites/default/files/2026-07/boiler_upgrade_scheme_guidance_for_installers_v5.1_20260630135616-20260701135531.pdf