M&E Contrax Resources
Air Souce Heat Pump Costs
Resource Highlights:
Air source heat pump installation costs vary based on property size, heat loss, and system design, not just the unit itself.
The biggest cost drivers are usually radiators, hot water cylinder requirements, electrical work, and outdoor unit placement.
In England and Wales, support may be available through the Boiler Upgrade Scheme (BUS) for eligible installations.
The best way to get an accurate figure is a survey and written specification that clearly lists what is included and what is excluded.
How much does an air source heat pump installation cost?
When people ask how much an air source heat pump installation costs, what they usually want is a clear, realistic explanation of what drives the final figure. The truth is that heat pumps are not a one size fits all product. The cost depends on your property, your existing heating system, and what changes, if any, are needed to make the heat pump run efficiently and comfortably.
This guide explains the main factors that affect cost, what should be included in a proper quote, and how to compare installers so you get the right system, not just the lowest headline figure.
Typical air source heat pump installation in the UK
Air source heat pumps are now a well established option for low carbon heating in the UK, but installations can vary widely from property to property. Rather than expecting a standard “average”, it is more useful to understand what a typical installation includes and why the scope can differ.
A typical air source heat pump installation usually involves:
A properly sized outdoor heat pump unit
A hot water cylinder that is compatible with heat pump operation, where required
Updated controls and commissioning so the system runs efficiently
Checks to radiators and heating distribution, with upgrades in some rooms if needed
Any electrical work needed to ensure safe installation and compliance
A full handover, documentation, and guidance on how to run the system day to day
The biggest variation between installations usually comes from the property’s heat loss, the existing heating system, and what needs changing to deliver comfortable heating at the right temperatures.
What affects the installation cost?
Heat pump size and heat loss
Larger, less efficient homes usually need more capacity and more careful design.
Radiators and underfloor heating
Heat pumps work best with the right emitter sizes. Some homes need radiator upgrades in certain rooms.
Hot water cylinder and controls
Heat pumps typically need a compatible hot water cylinder and good controls. Older cylinders may need replacement.
Pipework condition and system changes
Older systems may need changes to support efficient low temperature heating.
Electrical requirements
You may need additional electrical works depending on the existing setup.
Access, mounting and pipe routes
Outdoor unit location, pipe run lengths, and access complexity can affect labour and materials.
How the Boiler Upgrade Scheme changes the numbers
In England and Wales, eligible installs can receive £7,500 towards an air source heat pump.
The BUS process is installer-led and has scheme timing and eligibility rules that your installer will manage as part of the install route.
Read our full guide: Boiler Upgrade Scheme (BUS) guide
How to compare heat pump quotes properly
When you get quotes, do not compare headline prices alone. Compare:
the heat loss assumptions and sizing approach
what radiator or cylinder changes are included
what electrical work is included
what controls and commissioning are included
warranty, aftercare, and documentation
any grant assumptions and whether eligibility has been confirmed
If one quote is much cheaper, it often means something has been assumed away rather than included.
Useful Links
Get a Free Quote and Survey
If you want a clear cost based on your property rather than generic averages, we can assess your home or business and recommend the right system and scope from the start.
Funding, grant values and eligibility criteria can change. This content is correct to the best of our knowledge at the time of writing. Always check the latest scheme details on GOV.UK and confirm eligibility during your survey and quotation.
Simple overview
If you want the simplest approach, follow this order:
Gather 12 months of energy use if possible
Book a survey so heat loss, radiators, and hot water can be assessed
Ask for a quote that clearly lists what is included and what is excluded
If relevant, confirm grant eligibility and how it is applied
Choose the installer based on design quality and scope, not just price
Frequently Asked Questions
Often yes upfront, because a heat pump is a full system design and may include upgrades to radiators, cylinders, or controls. MoneySavingExpert notes a typical air source heat pump cost around £11,000 compared to a lower figure for a straightforward boiler replacement.
It depends on your property, your system design, and your tariff. The best way to estimate is a survey and performance based proposal.
Not always. Some homes only need upgrades in certain rooms. A survey will confirm what is needed.
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