Air Source Heat Pump Services

Heat your property the effIcient way with air source Heat pump installation, servicing & maintenance for homes & businesses.

Professional air source heat pump services across Buckinghamshire, Oxfordshire, and Northamptonshire, delivered by experienced, MCS-accredited engineers. From new installations to long-term system support, we work to deliver efficient, low-carbon heating systems designed for real-world performance.

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“Everything was explained clearly and the system works exactly as promised. The installation was neat and well organised.”

Heat pump grants and funding Up to £7500!

A white air source heat pump unit sits on a gravel base against a house wall with grey horizontal siding and a brick base.

Heat pump installations may be eligible for government funding schemes up to £7500, subject to property suitability and eligibility criteria.


As an MCS-accredited installer (Certification Number: OFT-100856), and certified by OFTEC, we can advise on current funding options and confirm whether your project qualifies before work begins.


What is the Boiler Upgrade Scheme?


Direct from GOV.uk: The Boiler Upgrade Scheme (BUS) supports the decarbonisation of homes and small and medium non-domestic buildings in England and Wales. The scheme provides upfront capital grants of up to £7,500 to encourage property owners to replace existing fossil fuel heating with more efficient, low-carbon heating systems, including heat pumps and biomass boilers.


Grant availability, values and requirements can change, so we always provide up-to-date guidance as part of the quotation process.


How do I apply for the Boiler Upgrade Scheme?


We will take care of everything for you, before, during, and after the installation. We will commission and prepare all documents for the application and guide you through it. We are MCS-accredited to offer the design, supply, and installation of Air Source Heat Pumps to qualify for the grant.

Our Heat Pump Services

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installation

We design and install heat pump systems tailored to the property, usage and heat demand. This includes full system design, emitter assessment and integration with heating and hot water systems.

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service & maintenance

Regular servicing helps maintain efficiency, reliability & compliance. We provide ongoing servicing & maintenance for both residential & commercial heat pump systems.

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diagnosis & repairs

If a system is underperforming or has developed a fault, we carry out structured diagnostics and professional repairs to restore correct operation.

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upgrade & optimisation

We improve existing heat pump installations through system balancing, control upgrades and performance optimisation where required.

Air-source Heat pump systems explained

A dark gray outdoor heat pump unit sits on a stone patio against a white house wall next to a glass door and a small tree.

Air Source Heat Pumps (ASHP) are a system that can transfer heat from the outside of your property to inside. Using the latest technology principles of vapour compression refrigeration, it uses a refrigerant system involving a compressor and condenser to absorb heat and transfer it to your home. In simple terms, they do the opposite of an air conditioning unit or fridge; rather than cooling, they warm, and the heat can then be distributed around your home by using your radiators or underfloor heating. Unlike gas and oil boilers, ASHPs are typically designed to run 24/7 using low continuous amounts of heat and energy, rather than large amounts of energy and bursts of heat.


ASHPs are run from electricity and prevent any need for Gas or Oil installation. If you are looking to futureproof your home with a Green energy installation and want a low carbon footprint while potentially saving £100’s yearly on your energy bills, then an Air Source Heat Pump is for you.

A worker installs white tubing for a radiant floor heating system over reflective foil insulation on a grid pattern.
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Air source and hybrid heat pumps

We work with a range of heat pump system types, including:

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Air source heat pumps

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Hybrid systems (heat pump combined with a boiler)

Systems are selected based on property type, available space, heat demand and long-term performance requirements.

This includes residential properties, new builds, renovations, mixed-use buildings and commercial environments.

A technician kneels to install a white heat pump unit in a home interior entryway with green paneling and rubber boots.
A worker installs white tubing for a radiant floor heating system over reflective foil insulation on a grid pattern.
A modern bathroom with black walls, a round backlit mirror, a white vessel sink on a wooden vanity, and a towel.
A dark gray outdoor heat pump unit sits on a stone patio against a white house wall next to a glass door and a small tree.

Experience with leading heat pump manufacturers

We work with established heat pump manufacturers commonly specified in the UK.


This includes experience with brands like Worcester Bosch, Grant, and many others:

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Worcester Bosch

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Mitsubishi Electric

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Clivet

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Daikin

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Grant

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Samsung

Systems are installed and commissioned in line with manufacturer and MCS requirements to protect performance and warranty cover.

Commercial heat pump systems

In addition to residential installations, we design, install and maintain commercial heat pump systems for a range of building types and project scales.


This includes:

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Commercial heat pump installations and upgrades

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Integration with existing heating systems and plant rooms

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New build and developer-led schemes

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Planned servicing and long-term maintenance

Work is delivered by experienced engineers familiar with commercial environments, compliance requirements and ongoing system support.


For full details of our commercial capabilities, visit our Commercial Services page.

Accreditations and compliance

All heat pump work is delivered in line with current UK regulations and industry standards.

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Manufacturer approved where applicable

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Fully insured

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MCS accredited installer

At Green Mechanical Solutions Ltd we are listed as one of Mitsubishi Accredited Installers (AI) with a dedicated team of ECO qualified engineers entitling us to give a minimum of 3 years manufacturer warranty on all our Heat Pump installations.

In addition to this we are Samsung Gen 6 qualified installers which entitles us to register a 7 year manufacturer warranty on all Samsung Air Source Heat Pump installations.

We work closely with our suppliers to secure the best prices on the latest technology, and we are pleased to offer 7-year warranties for our Clivet S.P.A. heat pump installations. 

How our process works

1

Assess and design

We assess the property, insulation, emitters and heat demand to determine system suitability.

2

Quote clearly

You receive a clear explanation of the work required and transparent pricing.

3

Install and commission

The system is installed, commissioned and tested to ensure correct operation.

Why choose Green Mechanical Solutions for heat pumps

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Experienced residential and commercial installers

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Air source, ground source and hybrid systems

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Proper system design, not off-the-shelf installs

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Honest advice on suitability and performance

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Ongoing servicing and maintenance available

AREAS WE COVER for Heat Pumps

Serving Homes and Businesses Across Three Counties

Green Mechanical Solutions offers Heat Pump service, repair, and installation for homeowners and businesses across Buckinghamshire, Oxfordshire, and Northamptonshire:

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Buckingham

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Milton Keynes

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Towcester

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Brackley

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Banbury

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Bicester

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Bletchley

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and surrounding areas.

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and surrounding villages.

If your area is not listed above, just get in touch. We likely cover it for heat pump services within the three counties. Our commercial work covers the South East of England.

Heat pump FAQs - Your Questions Answered

  • Do you install heat pumps in commercial buildings?

    Yes. We design, install and maintain heat pump systems for residential and commercial properties.

  • Do you offer servicing and maintenance?

    Yes. We provide planned servicing and ongoing support for heat pump systems.

  • Are heat pumps suitable for all properties?

    Not every property is suitable without upgrades. We assess each project carefully before advising.

  • Do heat pumps work in cold weather?

    Yes. Modern systems are designed to operate effectively in UK conditions when correctly specified.

  • How do I apply for the Boiler Upgrade Scheme?

    We will take care of everything for you, before, during, and after the installation. We will commission and prepare all documents for the application and guide you through it. We are MCS-accredited to offer the design, supply, and installation of Air Source Heat Pumps to qualify for the grant.

  • How much will an air source heat pump cost?

    All of this depends on what size heat pump you need and how much work/alterations are needed; every property is different. Please get in touch for a free, no obligation quote.

  • Will I have to change all my radiators and why?

    For all installations, we will carry out a full room-by-room heat-loss report to determine whether and which radiators may need upgrading. The reason is that Air Source Heat pumps operate at a lower flow temperature than your current boiler, so you typically need a larger heating area to achieve the same heat output.

  • How much do air source heat pumps cost to run?

    There are many factors to take into consideration, such as the size of your house, the insulation values, the efficiency of a Heat Pump is calculated in CoP (Coefficient of Performance). CoP measures the amount of input compared to the amount of output. For example, if a heat pump uses 1 kW of electricity and produces 4 kW of heat, the CoP is 4 (400% efficient). The higher the CoP, the more efficient the heat pump is, and the lower your bills will be. The average CoP for a heat pump is more than 3. Even the best gas boiler on the market would be less than 100 % efficient.

  • Where do I put the heat pump?

    The heat pump has to be sited outside, typically on a rear external wall with a minimum of 1 metre clearance from the front of the fan. Locations can all be discussed with your engineer as to where is best and most practical.

Our Reviews

Professional advice. Reliable systems. Long-term performance.

Request a heat pump quote

If you are considering a heat pump system or need support with an existing installation, contact Green Mechanical Solutions.

Professional advice. Correct design. Reliable low-carbon heating.