Air Source Heat Pump Installation in Llanfallteg, Carmarthenshire

Smart Energy Homes recently completed an air source heat pump installation at a detached four-bedroom property in Llanfallteg, Carmarthenshire, helping the homeowner move away from an ageing oil heating system and towards a more efficient renewable heating solution.

The homeowner had been considering alternatives to oil heating due to rising fuel costs and the age of their existing boiler, which was more than 20 years old and approaching the end of its lifespan. With annual oil costs estimated between £1,200 and £1,500, they wanted to explore whether an air source heat pump could provide long-term savings while improving overall efficiency.

Following a detailed survey of the property, our team designed and installed a Grant Aerona 290 9kW Air Source Heat Pump system, alongside radiator upgrades and a new hot water cylinder.

Get Started

Understanding the Property

The property is a four-bedroom detached home near Llanfallteg in Carmarthenshire, originally built between 1920 and 1939. Over the years the home has been extended, including a two-storey extension which already benefits from underfloor heating.

The property was heated by an oil boiler system that had reached the end of its useful life. The homeowner was also interested in wider energy efficiency improvements, including additional loft insulation and battery storage to complement an existing solar PV system installed around 12 years ago.

Property Overview

Location: Llanfallteg, Carmarthenshire
Property Type: Four-Bedroom Detached House
Construction Period: 1920-1939
Previous Heating System: Oil Boiler
Age of Existing Boiler: 20+ Years
Existing Renewables: Solar PV System
Additional Heating: Underfloor Heating
Customer Goal: Reduce heating costs and improve efficiency
Additional Interests: Battery Storage & Insulation Improvements

The Recommended Solution

After assessing the property’s heating demand, insulation levels and existing heating system, Smart Energy Homes recommended a Grant Aerona 290 9kW Air Source Heat Pump.

System Installed

Air Source Heat Pump: Grant Aerona 290 9kW
Hot Water Cylinder: Joule Cyclone Slimline Unvented 180L Indirect Cylinder
Heating Controls: Grant Aerona 290 Smart Controller
Central Heating Upgrade: Partial
Installation Duration: 4 Days
Supply Run: 1 Day

The heat pump was installed outside the utility room, with the new hot water cylinder located internally within the utility area for convenient access and efficient operation.

Find Your Solution

Installation Process

The installation was completed over four days by our experienced heating engineers.

The project included:

Heat pump installation
Hot water cylinder installation
Radiator upgrades
Smart control installation
System commissioning
Performance testing and optimisation

Once complete, the system was thoroughly tested to ensure it was operating correctly before handover to the homeowner.

Radiator Upgrades

To ensure the heat pump could operate efficiently, several existing radiators were upgraded throughout the property.

A total of eight radiators were replaced, including upgrades to:

Kitchen
Hallway
Study
Bedrooms
Bathroom
Cloakroom

Correctly sized radiators play an important role in helping air source heat pumps achieve optimal performance, particularly in older properties transitioning from oil heating systems

Get Started

Air source heat pump unit installed on a stone patio

Why Replace an Oil Heating System?

The homeowner’s primary concern was the ongoing cost of oil heating and the age of the existing boiler.

Like many rural properties across Carmarthenshire and West Wales, the home relied on oil deliveries for heating and hot water. As equipment ages and fuel costs fluctuate, many homeowners begin to explore renewable alternatives that offer greater efficiency and lower reliance on fossil fuels.

Benefits of upgrading to an air source heat pump can include:

Lower carbon emissions
Improved energy efficiency
Reduced reliance on oil deliveries
Consistent home comfort
Future-ready renewable technology
Potential long-term savings

Existing Solar Panels and Future Battery Storage

One particularly interesting aspect of this project was the homeowner’s existing solar PV system.

Installed around 12 years ago, the system continues to generate renewable electricity and is linked to a Feed-in Tariff agreement. During discussions, the homeowner also expressed an interest in battery storage to maximise the use of their generated electricity and further improve self-sufficiency.

This demonstrates how many homeowners are now taking a whole-house approach to energy efficiency by combining technologies such as solar panels, battery storage and air source heat pumps.

Looking for a Heat Pump Installer in Carmarthenshire?

If you’re considering replacing an oil boiler with an air source heat pump in Llanfallteg, Carmarthenshire or the surrounding area, Smart Energy Homes can help.

Our experienced team installs renewable heating systems across West Wales, helping homeowners reduce running costs, improve efficiency and future-proof their homes.

Contact Smart Energy Homes today to arrange a free home survey and discover whether an air source heat pump could be the right solution for your property.

Get Started

QUALITY YOU CAN TRUST

BLOGS

View all

Air Source Heat Pump Installation in Ystradgynlais, Powys

Smart Energy Homes recently completed an air source heat pump installation at a property in Ystradgynlais, Powys. The homeowner wanted to reduce high energy costs and move away from oil heating. Our team installed a Grant Aerona 290 6.5kW air source heat pump, a new hot water cylinder and smart heating controls, helping improve efficiency while benefiting from support through the Boiler Upgrade Scheme.

Air Source Heat Pump Installation Carmarthenshire