Baxi HP40 Monobloc Air Source Heat Pump

If you are looking to upgrade to a low carbon solution in your home, the Baxi Air Source Heat Pump is the perfect choice for reliable, energy-efficient heating and hot water.

There’s an output suitable for your home, whatever the size of your property, and it comes with a magnetic filter to protect your heating system.

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Features and benefits    |    Dimensions    |    Product literature    |    FAQs

Features and benefits

* UK terms and conditions
* Republic of Ireland terms and conditions


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4-5kW models

Model A (mm) B (mm) C (mm) D (mm) E (mm) F (mm) G (mm) H (mm)
4/5kW 1309 700 400 717 426 121 644 379

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7-13kW Models

Model A (mm) B (mm) C (mm) D (mm) E (mm) F (mm) G (mm) H (mm)
7/8/11/13kW 1388 850 448 864 523 191 656 363

Product literature


  • Grants for Heat Pumps
  • Getting my home ready for an Air Source Heat Pump
  • How do Air Source Heat Pumps work
  • Frequently asked questions about the Boiler Upgrade Scheme
  • How to restart your air source heat pump again after a power cut

Different parts of the UK may offer different grants to help you with the cost of installing an air source heat pump. We provide a brief overview and links to some of the main organisations that you can contact for further information on grants and loans.

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Here we answer some of the most common questions that people ask when they are starting to think about having an air source heat pump.

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An air source heat pump takes heat from the air and boosts it to a higher temperature using a compressor. It then transfers the heat to the heating system in the home. It works a bit like a refrigerator in reverse.

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The government boiler upgrade scheme was launched in April 2022. It will provide a boiler upgrade grant to help owners of domestic and small non-domestic properties in England or Wales with the upfront cost of installing low carbon heating systems, such as heat pumps. It will run from 2022 to 2025.

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When the power comes back on after a power cut, your air source heat pump controls will all come back on again normally, and there is nothing you have to reset. Please watch our video for more information.

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Grants for Heat Pumps

If you are upgrading your heating system, have you considered installing an air source heat pump? You could be eligible for a grant of £7,500 to help with the installation cost.

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