Swindon is Wiltshire's largest town and one of the fastest-growing in southern England, with housing that runs from railway-era terraces in Old Town and the Railway Village out to the big post-war and 1990s estates at West Swindon, Haydon Wick and Priory Vale — the newer, better-insulated stock is among the more straightforward heat pump retrofits in the region. The town is on mains gas, so most Swindon homes fall under the standard £7,500 Boiler Upgrade Scheme grant, but the North Wiltshire villages out towards Highworth, Cricklade and the Cotswold fringe include plenty of off-gas-grid properties on oil, where the £9,000 rate applies. Installers covering the SN postcodes tend to be Wiltshire and Hampshire firms working along the M4 corridor.
£7.5k–£9k
Before you get quotes, check what grant you qualify for — most Wiltshire homes get £7,500, off-grid oil/LPG homes now get £9,000. 60-second calculator →
1EE Renewables
Coverage: Swindon postcodes SN1–SN26, including Old Town, Haydon Wick, Priory Vale, West and North Swindon, Wroughton, Chiseldon, Blunsdon, Highworth and Royal Wootton Bassett, from a base at Fareham in Hampshire
Visit website →States that it is made up of "MCS-approved installers of Vaillant UK air source heat pumps" and that "Full MCS certification keeps every installation compliant and grant-eligible". Describes designing systems around the area's hard water, handling Boiler Upgrade Scheme grant paperwork, and covering hot water cylinder design, radiator upgrades, commissioning and aftercare.
Air source heat pumpsSystem designHot water cylindersRadiator upgradesBUS grant handling
Certification claims are the installer's own — verify on the official MCS register. From the installer's public website, last checked 2026-08-30.
2Wiltshire Energy
Coverage: Swindon and the wider Wiltshire area, from a base at Royal Wootton Bassett
Visit website →States that since starting in 2016 the company has moved "from contracting out our expertise, to attaining MCS accreditation, and moving away from gas and oil to focus completely on the renewable heating and energy sector". Describes itself as a family business and lists heat pump installation, servicing and repairs alongside underfloor heating, solar thermal and solar PV.
Air source heat pumpsGround source heat pumpsHeat pump servicingHeat pump repairsUnderfloor heating
Certification claims are the installer's own — verify on the official MCS register. From the installer's public website, last checked 2026-08-30.
3AES
Coverage: Homeowners across Wiltshire including Swindon, Salisbury and Chippenham, from a base at Romsey in Hampshire
Visit website →Displays an MCS Certified badge on its Wiltshire heat pump page rather than a written certification claim. States that it serves homeowners across Wiltshire including Salisbury, Swindon and Chippenham, and lists Mitsubishi Ecodan and Vaillant aroTHERM plus installations, heat pump maintenance and servicing, and Boiler Upgrade Scheme applications.
Air source heat pumpsHeat pump servicingBUS grant applications
Certification claims are the installer's own — verify on the official MCS register. From the installer's public website, last checked 2026-08-30.
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