Heat pumps work differently from boilers. A boiler typically heats a home in bursts, switching on hard for a few hours in the morning and evening. A heat pump is usually most efficient running 'low and slow': keeping water at a modest temperature for longer and holding rooms at a steady temperature rather than reheating them from cold. Many people find this takes a week or two to get used to.
We set up weather compensation for each Mid Glamorgan home from its own heat loss design, not a factory default. Across Mid Glamorgan and Mid Glamorgan, heating curves are fine-tuned after the first cold spell to suit how each house responds. If an existing heat pump in Mid Glamorgan feels costly to run, a controls check is often the first thing to look at.
Who it suits
- Homes with solar PV or a battery that want hot water timed to match
- Existing heat pumps that feel expensive to run or slow to respond
- Households considering a heat pump or time-of-use electricity tariff
- Every new heat pump installation, set up at commissioning
Grants and rules for heat pumps in Wales
Homes in Mid Glamorgan can use the Boiler Upgrade Scheme, which applies in Wales as well as England: £7,500 towards an air source heat pump, or £9,000 when it replaces oil or LPG heating for installations from 21 July 2026 to 31 March 2027. The MCS-certified installer named in your quote applies and deducts the grant.
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.
Prices
Weather-compensating controls and set-up are included in every full system price. See the guide prices for full systems.
Towns we cover in Mid Glamorgan
We cover 11 towns in Mid Glamorgan for heat pump controls and tariffs. Each links to local guide prices and the grant position for Wales.
| Town | Postcode district | Nearest town | Midwinter daylight |
|---|---|---|---|
| Bridgend | CF31 | Porthcawl | 7 h 49 min |
| Merthyr Tydfil | CF47 | Aberdare | 7 h 47 min |
| Pontypridd | CF37 | Llantrisant | 7 h 49 min |
| Aberdare | CF44 | Mountain Ash | 7 h 47 min |
| Caerphilly | CF83 | Pontypridd | 7 h 49 min |
| Maesteg | CF34 | Port Talbot | 7 h 48 min |
| Porthcawl | CF36 | Bridgend | 7 h 50 min |
| Bargoed | CF81 | Blackwood | 7 h 48 min |
| Llantrisant | CF72 | Pontypridd | 7 h 49 min |
| Mountain Ash | CF45 | Aberdare | 7 h 48 min |
| Tonypandy | CF40 | Pontypridd | 7 h 48 min |
Heat pump controls and tariffs questions
How should I set the hot water on a heat pump?
Most households heat hot water once or twice a day at set times rather than on demand. Timing the main heat for a cheaper tariff period, or for the middle of the day when solar panels generate, helps keep costs down. A weekly legionella cycle raises the water temperature higher, and we schedule it at a sensible time.
Why are my radiators only warm, not hot?
That is normal for a heat pump. It heats radiators to a lower temperature than a boiler, so they feel warm rather than hot to the touch, while running longer to keep the room at a steady temperature. If rooms reach the temperature you set, the system is working as designed. If a room stays cold, the settings or radiator size may need checking.
What flow temperature should my heat pump run at?
It depends on the design: the flow temperature is set so your radiators or underfloor heating can heat each room on a cold day. Well-designed systems typically run at around 35–50°C at their coldest, and lower in milder weather through weather compensation. Your design paperwork states the design flow temperature, and we set the heating curve to match it.
Can I control my heat pump from my phone?
Many heat pumps offer an app or work with smart thermostats, letting you change temperatures, set schedules and see energy use from your phone. Features vary by make and model, and app control usually needs a reliable internet connection at home. The heating keeps running on its own settings if the connection drops.