Heating Options for Welsh Homes
Welsh homes use several heating technologies, with the mix reflecting the rural/urban split and the age of the housing stock:
Gas central heating (combi or system boiler): Dominant in urban and suburban Welsh areas served by the gas network ā Cardiff, Swansea, Newport, Wrexham, and their surroundings. Efficient and well-understood technology, though gas prices have increased significantly since 2021.
Oil-fired central heating: Common in rural Welsh areas off the gas network ā Powys, Ceredigion, rural Pembrokeshire, much of Gwynedd and Anglesey. Requires an oil tank and regular deliveries. Oil boilers are serviced annually by OFTEC-registered engineers.
LPG (liquefied petroleum gas): Used where gas and oil are impractical. Higher running costs than oil or mains gas but lower installation cost than heat pumps.
Air source heat pumps (ASHP): Increasingly common as the primary heating choice for new builds and as replacements for old boilers in well-insulated properties. Extract heat from outside air and transfer it indoors, even in cold Welsh winters.
Ground source heat pumps (GSHP): More efficient than air source but require excavation for ground loops. Best suited to rural Welsh properties with adequate land.
Heat Pumps in Wales
Wales's climate is well-suited to air source heat pumps ā milder winters than Scotland or Northern England, and relatively consistent temperatures. The Welsh Government has actively promoted heat pumps through the Warm Homes Programme.
Heat pumps work best in Welsh homes when:
- The property has good insulation (loft insulation to 270mm minimum, cavity wall or solid wall insulation)
- Radiators are appropriately sized for lower flow temperatures (55Ā°C vs 70Ā°C for gas)
- The property uses underfloor heating (ideal for heat pump flow temperatures)
- The electricity tariff is favourable (smart tariffs with low overnight rates suit heat pump use)
Heat pumps may not be suitable if:
- The property is poorly insulated and insulation improvements aren't feasible
- The property is in a conservation area with noise restrictions (ASHP units produce some noise)
- The property has no outdoor space for the external unit
Installation Costs
| System | Typical installed cost (Wales, 2026) |
|---|---|
| New gas combi boiler | Ā£1,400āĀ£2,600 |
| Air source heat pump (3-bed house) | Ā£8,000āĀ£15,000 |
| Ground source heat pump | Ā£15,000āĀ£30,000 |
| Boiler Upgrade Scheme grant (ASHP) | Ā£7,500 reduction |
The UK Government's Boiler Upgrade Scheme currently offers Ā£7,500 towards ASHP installation for Welsh homeowners ā significantly reducing the net cost of switching from gas to heat pump.