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Air Source Heat Pumps installations across Cornwall

At Leighton James Plumbing & heating, we specialise in the design and installation of air source heat pumps across Cornwall. As MCS-accredited installers, we deliver efficient, low-carbon heating solutions and take care of all Boiler Upgrade Scheme (BUS) grant paperwork, making the process as simple and stress-free as possible for our customers.

Air source heat pumps are an environmentally friendly alternative to traditional oil or gas boilers, providing reliable heating and hot water while significantly reducing carbon emissions and long-term running costs.

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Why Choose an Air Source Heat Pump?

An air source heat pump extracts renewable energy from the outside air and converts it into heat for your home. Even in colder weather, modern systems operate efficiently and are well suited to properties across Cornwall.

When correctly designed and installed, heat pumps can achieve efficiencies of over 300%, meaning they produce more heat energy than the electricity they consume.

Benefits of Choosing Leighton James

  • MCS-Accredited Heat Pump Installers
  • BUS Grant Paperwork Fully Managed
  • Tailored system design for your property
  • Experienced local engineers
  • Clear, honest advice — no pressure selling
  • Ongoing support and aftercare
  • Heating & Renewables

Is a Heat Pump Right for Your Property?

Air source heat pumps work particularly well with underfloor heating and modern radiators but can also be suitable for many existing homes. A site survey allows us to assess insulation levels, heat loss, and system design to ensure the best possible performance.

If you’re considering a heat pump installation and want clear advice from an accredited local company, we’d be happy to help.

Contact us today to arrange a survey or discuss your options.

MCS Accreditation & Boiler Upgrade Scheme

We are Microgeneration Certification Scheme (MCS) accredited, which means our installations meet strict industry standards for quality, performance, and compliance.

MCS accreditation is essential — without it, homeowners cannot access government heat pump grants.

Boiler Upgrade Scheme (BUS)

As part of our service, we handle all Boiler Upgrade Scheme (BUS) paperwork on your behalf. The BUS grant currently offers up to £7,500 towards the cost of installing an air source heat pump in eligible properties.

We will:

  • Assess your property’s eligibility
  • Design a compliant heat pump system
  • Complete and submit all required MCS and BUS documentation
  • Guide you through the process from start to finish


No forms. No confusion. No chasing.

Other services

Boiler Installation & Maintenance

Expert boiler installations, servicing and repairs carried out by experienced, Gas Safe registered engineers. We focus on performance, efficiency and long-term reliability to keep your home running smoothly.

Bathroom concept & design

Thoughtfully designed bathrooms created in collaboration with our clients. From layout and specification to installation, we combine practical expertise with design-led solutions for beautifully finished spaces.

Boiler Servicing

Regular servicing helps keep your boiler safe, efficient, and reliable year-round. Our fully qualified engineers provide professional servicing, maintenance, and breakdown support across Cornwall.