We cover 12 towns and cities in Wiltshire, including Swindon, Salisbury, Trowbridge and Chippenham. Every installation is designed from a room-by-room heat loss calculation, so the heat pump, radiators and cylinder are sized for the house rather than guessed.
Towns we cover in Wiltshire
Heat pump services in Wiltshire
Grants and rules for heat pumps in England
Homes in Wiltshire can use the Boiler Upgrade Scheme, which takes £7,500 off the cost of an air source heat pump when it replaces fossil-fuel or electric heating. Replacing oil or LPG heating qualifies for £9,000 for installations from 21 July 2026 to 31 March 2027, and air-to-air systems for £2,500. The MCS-certified installer named in your quote applies for the grant and deducts it from the price.
There is no VAT on installing a heat pump anywhere in the UK until 31 March 2027. In England most houses can have an air source heat pump under permitted development, provided the unit meets the MCS noise and siting standards; the old 1 m boundary limit was removed on 29 May 2025. We flag listed buildings, flats and sensitive conservation-area positions at survey.
Guide prices in Wiltshire
| Home | Typical size | Installed guide price | After £7,500 grant |
|---|---|---|---|
| 1–2 bedroom flat or small terrace | 4–5 kW | £9,600–£12,650 | £2,100–£5,150 |
| 2–3 bedroom terrace or semi | 5–7 kW | £10,600–£13,650 | £3,100–£6,150 |
| 3 bedroom semi or small detached | 6–9 kW | £12,100–£15,650 | £4,600–£8,150 |
| 4 bedroom detached | 8–12 kW | £14,150–£18,200 | £6,650–£10,700 |
| 5+ bedroom or larger older house | 11–16 kW | £16,650–£22,750 | £9,150–£15,250 |
Installed, inc VAT: unit, cylinder, controls, minor pipework and commissioning.
Questions
Do I need new radiators for a heat pump?
Whether you need new radiators depends on each room's heat loss: some homes need a few larger radiators, while others can keep most of their existing ones. Heat pumps run most efficiently at low flow temperatures, around 35–50°C, so a radiator gives out less heat than it did with a boiler. The room-by-room heat loss calculation shows which rooms need a bigger radiator. A replacement radiator sized for a heat pump is a guide price of £250–£450 each, installed and including VAT.
Do air source heat pumps work in cold weather?
Yes, air source heat pumps are designed to keep working well below freezing and can heat your home through a UK winter. The system is sized for a cold design day in your area, so it is designed to cope on the coldest days. Efficiency falls as the outside temperature drops, and the unit periodically defrosts its outdoor coil, when a little vapour is normal. See how air source heat pumps work.
Does my home need to be well insulated before I get a heat pump?
Your home does not need to be perfectly insulated, but insulation affects the size of heat pump you need and how much it costs to run. A room-by-room heat loss calculation shows where heat escapes, and the system is sized to match. Simple measures such as loft insulation, cavity wall insulation and draught-proofing can lower heat loss. We point out worthwhile improvements at survey, so you can decide whether to do them first.
Can I keep my boiler and add a heat pump?
Yes, you can keep your boiler and add a heat pump as a hybrid system, where the heat pump usually handles most of the heating and the boiler helps on the coldest days or with hot water. A hybrid system is a guide price of £7,000–£11,000, installed and including VAT. Hybrid systems are not eligible for the Boiler Upgrade Scheme in England and Wales, so we compare both options with you at survey. See hybrid heat pumps.