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

Harrow's heating mix is fairly typical for the areas we track: roughly 87% mains gas, 12.5% electric, and a small share of oil, LPG or solid fuel. None of that changes the grant rule - it pays on replacement, whatever heating type you currently have, once an MCS-certified installer confirms it.

The split across Harrow's EPC-certified stock is 87% mains gas, 12.5% electric and 0.2% oil, LPG or solid fuel, a typical year's heating across the property types we profile here costs about £557, the most common EPC band locally is D (44% of rated homes) and the fuel-mix split above is drawn from 94.4% of Harrow's EPC certificates, which makes it a genuine local measurement rather than a national average pinned to your postcode.

Whether the grant pays for your Harrow home comes down to a single decision: do you replace your heating, or keep it? We show both outcomes with equal weight, never as a blanket promise.

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 Harrow plays no part in deciding whether you qualify. Planning permission for the outdoor unit in Harrow, 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.

An air-to-air enquiry from Harrow that qualifies for the grant goes to an MCS-certified installer; a cooling-only job goes to an F-Gas / REFCOM-registered engineer instead, since that is the licence refrigerant-only work actually requires. Mixing the two accreditations up is the mistake we see most often.