Hillingdon: £2,500 air-to-air heat pump grant

Heating in Hillingdon follows a fairly ordinary England-wide split: about 84.4% mains gas, 14.9% electric, and a small tail on oil, LPG or solid fuel. Whatever your own home runs on, the grant rule is the same everywhere - replace it with an air-to-air heat pump via an MCS-certified installer and the payment applies.

The split across Hillingdon's EPC-certified stock is 84.4% mains gas, 14.9% electric and 0.3% oil, LPG or solid fuel, a typical year's heating across the property types we profile here costs about £544, 41% of rated homes sit at EPC band D, the local mode and the fuel-mix split above is drawn from 95% of Hillingdon's EPC certificates, which makes it a genuine local measurement rather than a national average pinned to your postcode.

For a Hillingdon home, one decision settles whether the grant pays: replace your heating, or keep it. Both outcomes below carry equal weight - neither is the "default" answer.

Eligible - you replace your heating. If an air-to-air heat pump replaces a fossil-fuel or electric system (mains gas, oil, LPG, electric storage heaters or direct electric) and is fitted by an MCS-certified installer, the £2,500 applies, and the old system is decommissioned rather than run alongside the new one.

Not eligible - you keep your boiler. If you keep your existing heating and add cooling as a standalone unit, that cooling-only add-on does not qualify for the Boiler Upgrade Scheme grant, however it is marketed. Adding air conditioning while keeping your gas boiler is a private-pay job, carried out by an F-Gas / REFCOM-registered engineer rather than an MCS-certified one.

The grant itself is law and your eligibility is real, but no air-to-air product has reached the MCS Product Directory yet, so no installer can issue a Boiler Upgrade Scheme voucher today. Air-to-air enters MCS scheme scope on 5 December 2026, and vouchers follow once certified products list. Get quotes now, but treat the grant as pending rather than banked.

Grant rules as of August 2026 and subject to change, so always confirm the current terms on gov.uk before applying. This is a national scheme, so the London Borough of Hillingdon plays no part in deciding whether you qualify. Planning permission for the outdoor unit in Hillingdon, if you need it, is a different and entirely separate matter, covered on our planning pages.

MCS - the certification scheme for registered installers - is the quality standard your installer must hold for the grant to pay. It certifies the installer and the installation work, never the homeowner and never GetComfort.

From Hillingdon, a grant-eligible air-to-air job is routed to an MCS-certified installer, while a pure cooling job goes to an F-Gas / REFCOM-registered engineer - the licence that covers refrigerant-only work. Homeowners researching this grant mix the two up more than anything else.