Air Source Heat Pump Cost UK: Installation, Running Costs & Grants
The Government grant for air source heat pumps can reduce the upfront cost by £7,500 through the Boiler Upgrade Scheme, making the switch more affordable for eligible UK homeowners. But how much does an air source heat pump cost in the UK?
This guide covers average installation prices, grant support, running costs, key cost factors, and what to consider before upgrading your home heating system.
Quick Answer: How much Air source heat pump cost in the UK in 2026?
In 2026, an air source heat pump cost in the UK can start from around £2,500 to £8,500 after grant support, depending on the brand, system size in kW, property type, radiator upgrades, hot water cylinder, and installation requirements. Larger homes or premium models may cost more.
Air Source Heat Pump Cost Breakdown
Heat pump unit
Outdoor unit and main system equipment.
Installation labour
Fitting, pipework, setup, and commissioning.
Testing and commissioning
System testing, performance checks, setup, and final commissioning before handover.
Hot water cylinder
Usually required for domestic hot water storage.
Radiator upgrades
May be needed to support lower flow temperatures.
Controls
Thermostats, smart controls, and heating management.
Electrical work
Electrical connection, safety checks, and system requirements.
Survey and design
Heat-loss calculation, system sizing, and installation planning.
MCS certificate
MCS certification, compliance documents, and handover paperwork after installation.
Grant application
Support with Boiler Upgrade Scheme paperwork, eligibility checks, and application process.
What Affects the Cost of an Air Source Heat Pump?
The cost of an air source heat pump can vary from home to home because every property has different heating needs. The final price usually depends on the size of the system, how much heat your home loses, whether upgrades are needed, and how complex the installation is.
Property Size
Larger homes usually need a more powerful heat pump with a higher kW output. They may also need more pipework, larger radiators, and extra installation time. Smaller properties may cost less because the heating demand is usually lower.
Insulation Level
Good insulation helps keep heat inside the home. If your property loses heat quickly through walls, the roof, floors, or windows, the system may need to work harder. In some cases, insulation improvements may be recommended before installation.
Radiator Suitability
Heat pumps usually work at lower flow temperatures than gas boilers. This means some homes may need larger radiators or radiator upgrades to heat rooms properly. If your existing radiators are already suitable, this can help reduce extra costs.
Hot Water Demand
Most air source heat pump systems need a hot water cylinder. The size of the cylinder depends on how many people live in the home and how much hot water is used daily. Higher hot water demand may increase the overall system cost.
Installation Complexity
The cost can rise if the installation needs extra pipework, electrical upgrades, outdoor unit preparation, difficult access, or changes to the existing heating system. A home survey and heat-loss calculation help identify these requirements before giving an accurate quote.
Air Source Heat Pump Cost by Brand
Air Source Heat Pump Running Costs
Air source heat pump running costs depend on how much heat your home needs, your electricity price, and how efficiently the system runs. The key number to understand is SCOP. This shows how much heat the heat pump produces for each unit of electricity it uses.
For example, if a heat pump has a SCOP of 3.5, it can produce around 3.5kWh of heat from 1kWh of electricity. So, if your home needs 10,000kWh of heat per year, the heat pump would use around 2,857kWh of electricity
10,000kWh heat demand ÷ 3.5 SCOP = 2,857kWh electricity used
If electricity costs around 26p per kWh, the estimated running cost would be:
2,857kWh × £0.26 = £742.82 per year
So, for a home needing 10,000kWh of heating per year, the running cost could be around £740–£750 per year, depending on the tariff, system design, insulation, and usage.
| Annual Heat Needed | SCOP 2.8 | SCOP 3.5 | SCOP 4.0 |
|---|---|---|---|
| 8,000kWh | ~£743/year | ~£594/year | ~£520/year |
| 10,000kWh | ~£929/year | ~£743/year | ~£650/year |
| 12,000kWh | ~£1,114/year | ~£891/year | ~£780/year |
A higher SCOP means lower running costs. A heat pump works more efficiently when your home is well insulated, radiators are correctly sized, and the system can run at lower flow temperatures, usually around 35°C–45°C. If the system has to run hotter, such as 50°C–55°C, it may use more electricity.
Can You Get a Grant for an Air Source Heat Pump?
Yes, many UK homeowners can get support through the Boiler Upgrade Scheme, which currently offers £7,500 towards the cost and installation of an air source heat pump. The grant is designed to reduce the upfront cost, making the switch more affordable for eligible homes in England and Wales.
You usually do not receive the grant money directly. Instead, your MCS-certified installer applies for the grant on your behalf and deducts the amount from your quote. This means the £7,500 support is normally taken off the installation cost before you pay the remaining balance.
To qualify, your property must meet the scheme rules, and the system must be installed by an approved installer. The grant can help cover part of the total project cost, but you may still need to pay for extras such as radiator upgrades, a hot water cylinder, electrical work, or any additional installation requirements.
Is an Air Source Heat Pump Worth the Cost?
Yes, for many UK homeowners, an air source heat pump is worth the cost because it is not just a heating replacement, it is a long-term upgrade for your home. It can deliver efficient heating, support hot water, reduce reliance on gas, and help protect your home from rising energy costs over time.
The upfront price can look higher than a standard boiler, but the £7,500 Boiler Upgrade Scheme grant can make a big difference for eligible homes. When the system is correctly designed, installed, and matched to your property, a heat pump can provide steady warmth while using energy more efficiently.
It is especially worth considering if you plan to stay in your home for several years, want a more future-ready heating system, or are already thinking about improving insulation, radiators, or overall energy performance. A proper home survey will show exactly what your property needs and whether a heat pump can give you the best long-term value.
FAQs
Frequently asked questions (FAQs)
Simple answers to common questions about air source heat pump cost in the UK, including installation prices, grant support, running costs, radiator upgrades, hot water cylinders, and whether the system is worth the investment. Speak to Simple Green Energy.
Want an accurate cost?
Speak with Simple Green Energy to check your property, heat pump size, grant eligibility, radiator setup, hot water needs, and expected installation cost.
Get heat pump quoteFinal Thoughts
Air source heat pump cost in the UK can vary depending on your home, system size, brand, radiator setup, hot water needs, and installation work. That is why the cheapest quote is not always the best options, the right system should be properly designed around your property, not guessed.
With the £7,500 Boiler Upgrade Scheme grant, many UK homeowners can reduce the upfront cost and make the switch more affordable. When installed correctly, an air source heat pump can offer efficient heating, reliable hot water, and better long-term value compared with staying with an older heating system.
The best next step is a proper home survey. This will confirm your heat loss, suitable kW size, radiator requirements, cylinder needs, and final cost after grant support.
