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Heat Pump Installers in Carmarthenshire

Thermal Earth is based in West Wales and has been installing heat pumps across Carmarthenshire for over two decades. From farmhouses in the Towy Valley to coastal properties around Llanelli, we are the local experts in ground source and air source heat pump systems.

Carmarthenshire has one of the highest proportions of off-gas-grid homes in Wales, making it one of the best areas in the country for heat pump installations. If your home currently runs on oil, LPG, or electric storage heaters, a heat pump could cut your heating bills by 40% to 70%.

Our Carmarthenshire Projects

  • Ffos Y Broga — a retrofit ground source heat pump installation on a traditional Welsh property, replacing an ageing oil boiler
  • Lake Collector Heat Pump — an innovative installation using a lake as the heat source, demonstrating the versatility of water source heat pump technology
  • Cilrhiw Country House, Narberth — a large country house installation with multiple boreholes providing heating and cooling
  • Multiple residential projects — dozens of home installations across Carmarthen, Llanelli, Ammanford, and surrounding villages

Why Carmarthenshire Is Ideal for Heat Pumps

Carmarthenshire’s rural character means many homes are off the gas grid, making heat pumps the most cost-effective renewable alternative. The area’s geology is excellent for ground source systems, with good thermal conductivity in the local soil and rock. Our drilling team has extensive experience with Carmarthenshire ground conditions.

Many properties also have generous garden space, making both horizontal trench and borehole ground collectors viable. Horizontal systems cost less than boreholes and can be an excellent choice where garden area allows.

Grants and Funding for Carmarthenshire

  • £7,500 Boiler Upgrade Scheme grant — available to all homeowners, no income test
  • Nest Scheme — the Welsh Government’s home energy programme offering free or subsidised improvements to eligible households
  • Green Homes Wales — additional Welsh Government funding for energy efficiency

These schemes can often be combined. As an MCS certified installer, we handle the full BUS application and can advise on Welsh Government schemes too.

Get in Touch

As your local heat pump specialists, we’re just down the road. Contact Thermal Earth for a free consultation, or call us to speak with one of our engineers about your Carmarthenshire property.

Why Choose Thermal Earth in Carmarthenshire?

We are your local heat pump specialists — based right here in West Wales. Carmarthenshire is our home territory, and nobody knows the local conditions better:

  • Based in West Wales — we are the closest specialist installer for most Carmarthenshire properties
  • 20+ years and 3,500+ installations with deep experience in rural Welsh properties
  • Own drilling team with three rigs and extensive knowledge of Carmarthenshire’s geology
  • MCS certified for the £7,500 BUS grant — full application handled
  • Specialists in off-grid heating — we understand the challenges of replacing oil and LPG in rural Wales
  • Comfort Care aftercare and remote monitoring — ongoing support long after installation

Areas We Cover in Carmarthenshire

We cover the full county including Carmarthen town, Llanelli, Ammanford, Llandeilo, Kidwelly, Burry Port, Cross Hands, Newcastle Emlyn, Whitland, St Clears, Laugharne, and all rural areas in between. Many of the farms, cottages, and country houses we work on are in areas with no mains gas, where heat pumps deliver the greatest savings.

Frequently Asked Questions

How much does a heat pump cost in Carmarthenshire?

Costs depend on your property size and system type. Air source systems range from £8,000 to £18,000, while ground source installations with boreholes cost £18,000 to £45,000. However, Carmarthenshire properties with larger gardens can often use horizontal trench collectors, which cost £16,000 to £28,000 — significantly less than boreholes. The £7,500 BUS grant is deducted from all systems.

My home is off the gas grid — is a heat pump the best option?

For off-grid homes in Carmarthenshire, heat pumps are almost always the best long-term option. If you currently heat with oil, expect savings of 40–60%. For LPG, savings of 50–70% are typical. With the £7,500 BUS grant, the payback period on a heat pump is often under 8 years, and the system will last 20–25+ years.

Is my garden big enough for a ground source heat pump?

Many Carmarthenshire properties have plenty of space. Horizontal trench systems need roughly 2–3 times your home’s floor area in garden space. If space is limited, vertical boreholes need only a few square metres of access for the drilling rig. Our engineers assess your land and recommend the most cost-effective ground collector type during the free site survey.

Can I combine the BUS grant with Welsh Government schemes?

Yes. The £7,500 BUS grant can often be combined with the Welsh Government’s Nest Scheme and Green Homes Wales programme. For eligible households, this can cover most or all of the installation cost. We advise on all available funding and handle the BUS application as your MCS certified installer.

How long does installation take?

Air source installations take 2–3 days. Ground source systems take 3–5 days for internal works, plus 1–3 days for borehole drilling or trench excavation. As we operate our own drilling rigs from our West Wales base, scheduling for Carmarthenshire properties is particularly efficient.

What maintenance does a heat pump need?

Heat pumps require minimal maintenance — far less than oil boilers. An annual service is recommended to check refrigerant levels, inspect filters, and verify performance. Our Comfort Care service plan covers this and includes remote monitoring, so we can often spot issues before you notice them.