Wet underfloor heating is a network of plastic pipes laid under the floor that carries warm water from the heat pump and turns the whole floor into a large, low-temperature radiator. Because the heating surface is so big, it can keep a room comfortable with water at around 35–40°C, which is the range where heat pumps typically work most efficiently.
Homeowners in Dyfed and across Dyfed can mix underfloor heating downstairs with radiators upstairs on one heat pump. Kitchen extensions in Dyfed are often the natural place to add underfloor heating when a heat pump goes in. For homes in Dyfed with solid ground floors, a low-profile overlay system can avoid breaking up the existing floor.
Who it suits
- Self-builds and new floors where insulation and screed are going in anyway
- Rooms where wall space for radiators is scarce
- Homeowners who want even, gentle warmth with no radiators on show
- Extensions, especially open-plan kitchen-diners with large glazed areas
Grants and rules for heat pumps in Wales
In Wales the Boiler Upgrade Scheme gives £7,500 towards an air source heat pump (£9,000 if it replaces oil or LPG, from 21 July 2026 to 31 March 2027; £2,500 for air-to-air). The MCS-certified installer named in your quote applies to Ofgem for you, and the grant comes off your quote.
There is no VAT on installing a heat pump anywhere in the UK, Wales included, until 31 March 2027. Planning rules for heat pumps in Wales are set by the Welsh Government and differ from England's, so the surveyor checks the unit position against them.
Underfloor heating with heat pumps prices in Dyfed
Here are typical prices for underfloor heating with a heat pump in Dyfed, installed and including VAT. Use the guide price tool for a figure based on your home, then a survey confirms it in writing.
| Work | Guide price |
|---|---|
| Wet underfloor heating, one room | £1,500–£3,500 |
| Wet underfloor heating, whole ground floor | £5,000–£15,000 |
Installed, inc VAT. Floor finishes and screed drying time are confirmed at survey.
Towns we cover in Dyfed
We cover 11 towns in Dyfed for underfloor heating with a heat pump. Each links to local guide prices and the grant position for Wales.
| Town | Postcode district | Nearest town | Midwinter daylight |
|---|---|---|---|
| Llanelli | SA15 | Gorseinon | 7 h 48 min |
| Ammanford | SA18 | Pontardawe | 7 h 47 min |
| Aberystwyth | SY23 | Machynlleth | 7 h 40 min |
| Carmarthen | SA31 | Llanelli | 7 h 46 min |
| Cardigan | SA43 | Fishguard | 7 h 44 min |
| Fishguard | SA65 | Haverfordwest | 7 h 44 min |
| Haverfordwest | SA61 | Milford Haven | 7 h 46 min |
| Lampeter | SA48 | Carmarthen | 7 h 43 min |
| Milford Haven | SA73 | Pembroke Dock | 7 h 47 min |
| Pembroke Dock | SA72 | Milford Haven | 7 h 48 min |
| Tenby | SA70 | Pembroke Dock | 7 h 48 min |
Underfloor heating with a heat pump questions
Can I heat just one room with underfloor heating?
Yes. A single room, such as a kitchen extension, can have its own underfloor zone connected to the heat pump alongside the radiators in the rest of the house. It needs its own thermostat and a manifold, which for one room can be compact. The design checks the room's heat loss so the floor can meet it at the system's flow temperature.
How much will an overlay system raise my floor?
A low-profile overlay system typically adds around 15–25 mm for the boards, plus the thickness of the new floor finish. That can be enough to need door trimming, threshold strips and adjustments where the floor meets kitchen units or stairs. We measure these details at the survey so the build-up is agreed before work starts.
How much does underfloor heating cost with a heat pump?
Wet underfloor heating for a whole ground floor has a guide price of £5,000–£15,000, installed and including VAT, and a single room has a guide price of £1,500–£3,500. The spread reflects floor type, area, whether an overlay or screed system is used and how much floor preparation is needed. Your written quote fixes the price after the survey.
Is underfloor heating better than radiators with a heat pump?
Underfloor heating usually allows a lower flow temperature than radiators, which helps a heat pump run efficiently. That does not make radiators a poor choice: correctly sized radiators also work well, and they are far less disruptive to fit in existing rooms. Many homes use underfloor heating in an extension or on the ground floor and radiators elsewhere.