Recommended installers / London & South East / Mason Plumbing & Heating
Worcester Bosch accredited, Gas Safe registered heating engineers from Aylesbury, designing air source heat pumps and fitting new boilers across Buckinghamshire.
Our recommended installer
Looking for a heat pump installer in Aylesbury or Buckinghamshire? We recommend Mason Plumbing & Heating. They are Worcester Bosch accredited installers and Gas Safe registered engineers, and design each air source heat pump system around the home.
Mason Plumbing & Heating are based in Aylesbury and run by director Peter Mason. They work across Buckinghamshire and nearby towns, from Amersham and Beaconsfield to Tring, Thame and Leighton Buzzard.
Every heat pump starts with a discovery call and a technical survey, with a full heat loss assessment and a check of your existing heating system, before they recommend a system. They also fit and service Worcester Bosch boilers, with up to 12-year guarantees available.
Reviews
Services
Air source heat pumps, new Worcester Bosch boilers and boiler servicing, from local heating engineers.
Vaillant, Viessmann and Clivet air source heat pumps, designed around a full heat loss assessment.
See the heat pumpsWorcester Bosch Greenstar boilers, fitted by Worcester Bosch accredited installers.
See the boilersAnnual and strip-down services, in line with the manufacturer's servicing requirements.
Enquire nowThey help you check the £7,500 grant, or up to £9,000 for oil and LPG homes.
See the grantHeat pumps
Mason Plumbing & Heating install Vaillant aroTHERM plus, Viessmann Vitocal 250-A and Clivet air source heat pumps, choosing the right system for your home after the survey.
Vaillant
A highly efficient air source heat pump for reliable heating and hot water, with quiet operation that makes it a popular choice for homes.
Viessmann
A premium heat pump for efficient home heating and hot water, with smart technology to help keep your system running smoothly.
Clivet
A versatile air source heat pump for efficient, low-carbon heating, with different system options to suit the property.
Exact models and sizes are confirmed in your quote. See the funding options →
Heat pump funding in England
Mason Plumbing & Heating help you understand whether your home may be suitable for a heat pump and what grant support could apply.
Off the cost of an air source or ground source heat pump that replaces fossil fuel heating.
Extra for homes heated by oil or LPG with no mains gas, taking the grant to £9,000. Available until March 2027.
Heat pumps installed in homes are zero-rated for VAT until March 2027.
You don't need to be on benefits. Homeowners, landlords, second home owners and businesses can all qualify.
| System | Standard grant | Oil or LPG, no mains gas |
|---|---|---|
| Air source heat pump | £7,500 | £9,000 |
| Ground source heat pump | £7,500 | £9,000 |
| Air-to-air heat pump | £2,500 | £2,500 |
The extra £1,500 is available until March 2027. One grant per property. Limits apply: 45kWth for a single system and 70kWth for more than one heat pump.
Mason Plumbing & Heating carry out a technical survey with a full heat loss assessment, then send you a written proposal.
Your MCS certified installation is registered and the grant is applied for with Ofgem.
Ofgem contact you to confirm the installation. Reply to confirm.
The heat pump is installed and commissioned within 120 days of applying, and the grant is taken off what you pay.
Figures from GOV.UK (Boiler Upgrade Scheme), checked November 2026. Scotland has its own scheme through Home Energy Scotland.
Boilers
Mason Plumbing & Heating are Worcester Bosch accredited installers and fit a focused range of Greenstar boilers, with up to 12-year guarantees available.
Worcester Bosch
An entry-level option for smaller homes, flats and properties with lower hot water demand.
Worcester Bosch
A popular choice for family homes, with a strong balance of performance, efficiency and value.
Worcester Bosch
Designed for larger homes and higher heating or hot water demand.
Recent jobs
Two recent jobs, taken from Mason Plumbing & Heating's own case studies.
Aylesbury
A homeowner called about a leaking boiler, and several other parts were failing too. Rather than paying for repairs on an old boiler, they chose a Worcester Bosch Greenstar 4000, fitted in the loft with new heating controls and insulated loft pipework.
Aston Clinton
Mason fitted this heat-only boiler for a long-standing customer several years ago. At five years old it was due a full strip-down service in line with the manufacturer's requirements, with the heat exchanger cleaned and new burner gaskets and electrodes fitted.
Accreditations
Mason Plumbing & Heating are Worcester Bosch accredited installers and Gas Safe registered, and fit heat pumps from these manufacturers.
Worcester Bosch accredited installers
Gas Safe registered
Fits Vaillant heat pumps
Fits Viessmann heat pumpsFAQs
Yes. Mason Plumbing & Heating are Worcester Bosch accredited installers and Gas Safe registered engineers, so they can offer extended Worcester Bosch guarantees, with up to 12 years available on selected boilers.
They're based in Aylesbury and cover Buckinghamshire and nearby towns, including Amersham, Aston Clinton, Beaconsfield, Berkhamsted, Haddenham, Leighton Buzzard, Princes Risborough, Thame, Tring and Wendover. If you're not sure your area is covered, just ask in the form.
If your home qualifies, yes. The Boiler Upgrade Scheme gives £7,500 off an air source heat pump in England and Wales, or £9,000 if your home is heated by oil or LPG with no mains gas, until March 2027. Mason Plumbing & Heating can help you check whether your home qualifies.
It starts with a discovery call, then a technical survey at your home with a full heat loss assessment and a check of your existing heating system. Mason Plumbing & Heating then send you a proposal for a system designed around your home.
Yes. They carry out annual boiler servicing and full strip-down services, in line with the manufacturer's servicing requirements, so your boiler stays safe and its guarantee stays valid.
Get in touch
Tell us a little about what you need and we will pass your details straight to Mason Plumbing & Heating. They will be in touch to talk it through and arrange a survey.
We only recommend installers we know and work with. Mason Plumbing & Heating carry out the survey, quote and installation, and your contract is with them.
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Latest from Mason Plumbing & Heating
Recent heating jobs from the team on social media.