Heat pump prices: what’s the cost of an air source or ground source heat pump?
11 October 2021 | Aimee Tweedale
With the UK government discussing the future of gas boilers, it’s time for many of us to start looking for alternatives.
When it comes to eco-friendly home heating, heat pumps are the future. They’re efficient, renewable, safe, and they’re bound to be a key part of our path to a net zero world.
The only catch? Right now, upgrading to an air source or ground source heat pump is pricier than choosing another same-old boiler.
So: how much does a heat pump cost here in the UK? Can it save you money on your energy bills? And can you get an air source heat pump grant? Here’s everything you need to know.
How much does an air source heat pump cost?
Heat pump costs depend on lots of different factors. Just like with any other heating system, if you’ve got a bigger 3-4 bedroom house, for example, you can expect to pay more. If you choose a lower quality system or fewer fancy controls and add-ons, you could pay a bit less.
The first step in your air source heat pump pricing journey should be to get some quotes. You can do this by contacting MCS-registered installers and inviting them to survey your home. They can tell you how much it’s likely to cost to fit a heat pump that will keep your whole house toasty and warm.
A new air source heat pump can cost between £2,000-£9,0001, but typically, you can expect to pay £3,000-£4,000 for an average-sized home. That figure doesn’t include the price of installation, replacing your radiators, and other costs.
Air source heat pump running costs
How much does an air source heat pump cost to run, and can it save you money? The answer depends on:
- How big your home is
- How well-insulated your home is
- What type of heating system you’re replacing
- How warm you’d like it to be
- Your electricity tariff
- The temperature outside
- Whether you’re receiving the Renewable Heat Incentive (scroll down to learn more about this!)
In general, air source heat pumps are very efficient. They have what’s called a Coefficient of Performance, or CoP, of between 2.5-3.52. This means that for each kW of electricity used, 2.5-3.5 kW of heat is generated.
In other words, that’s an efficiency rating of 250%-350%. For comparison, most new, energy-efficient gas boilers have an efficiency rating of around 90%.
But this doesn’t necessarily mean your heating bills will be lower than they would be with a gas boiler, especially if you’re replacing a brand new model. If you’re replacing an oil or LPG boiler, conventional electric heating, or an old gas boiler, you might save some cash.
Switching to a time of use tariff can help you save money when running your air source heat pump. Even better: if you pair it with your own electricity generation system, such as solar panels, you’ll be saving even more. (Plus, you could apply for the Smart Export Guarantee, too!)
How much does a ground source heat pump cost?
While air source heat pumps take their heat from the air, ground source heat pumps – of course – take theirs from the ground.
The installation process includes placing pipes underground, usually in your back garden, to absorb the warmth. This means they’re quite big and complex, which can make them a bit pricier than air source heat pumps.
So: how much is the pump itself? Home Building estimates that an 8 kW GSHP that could heat a 4-bedroom house would be likely to cost £6,000-£7,000, not including installation3. There’s a big variation in cost in the market, though. It’ll depend on the quality and power of the heat pump you choose.
Ground source heat pump running costs
Ground source heat pumps are even more efficient than air source heat pumps. They generally have a CoP of 3-44 (or an efficiency rating of 300-400%).
But, just like air source heat pumps, their running costs will depend on all the factors listed above. If you’re replacing a very inefficient system you might save money. If you’re replacing a brand new boiler, you probably won’t.
Here are some estimates from the Energy Saving Trust. They worked out what you could save on your energy bills each year with a GSHP, depending on what type of heating system you switched from.
These numbers are based on a well-insulated 4-bed detached house, with bigger-than-average radiators.
|Original heating system||Money saved on energy bills by switching to a GSHP (£/year)|
|Old (G-rated) gas boiler||£330|
|New (A-rated) gas boiler||-£210|
|Old electric storage heater system||£1050|
|New electric storage heater system||£550|
|Old (G-rated) oil boiler||£440|
|New (A-rated) oil boiler||-£215|
|Old (G-rated) LPG boiler||£1330|
|New (G-rated) LPG boiler||£380|
How much does it cost to install a heat pump?
Installing a heat pump in your home is a bit more complicated than fitting a new boiler. For one thing, there are far fewer trained heat pump installers available in the UK than boiler engineers5. This means you’re paying for more specialist skills.
So how much will a new heat pump cost in total, once you factor in installation, parts, and everything else? The Energy Saving Trust estimates that getting an air source heat pump, including installation, comes to around £7,000-£13,0006.
Ground source heat pumps are usually more expensive to install. This is because the process involves digging underground to lay down new pipes. The Renewable Energy Hub estimates that a new ground source heat pump with installation costs could come to a total of £11,000-£15,0007.
The Energy Saving Trust puts their estimate higher, at £14,000-£19,0008.
There’s no getting around it: ground source heat pumps are a big investment. But they’re also often more energy-efficient, which means the outlay could be worth it eventually, thanks to savings on your heating bills. (The exact payback period is tricky to predict, as it depends on how well-insulated your home is, whether you get the Renewable Heat Incentive, and other factors.)
Now for some good news: as heat pumps become more common, more and more engineers will be trained in how to install them, making it less expensive. As the market grows, prices should fall. So, if you’re put off by costs right now, just watch this space.
Can I get a grant for installing a heat pump?
Got one eye on a new heat pump, and another on your bank account? Help is available!
The government’s Renewable Heat Incentive (RHI) pays out to householders who opt for clean, green heating tech (including some heat pumps).
This scheme gives you quarterly payments, rewarding you for each kWh of heat you produce. And these payments last for up to 7 years!
Are heat pumps worth the cost?
So, are air source heat pumps worth the money? We think so.
Sadly, right now, not everyone can afford them. But we hope this will change in the near future. In the meantime, here are a few reasons why we believe heat pumps are so worthwhile.
Benefits of air source and ground source heat pumps
- You can claim the Renewable Heat Incentive, to help with the running cost of your heat pump.
- Air source and ground source heat pumps are safe, with no flammable fuel and no risk of carbon monoxide leaks.
- They have a long lifespan, potentially lasting around 15 years9.
- Heat pumps could lower your energy bills if you’re replacing an old, inefficient system, or conventional electric heating10.
- You’ll be helping to fight the climate crisis by decarbonising heat, moving away from our dependence on fossil fuels. This is a really important part of the UK’s journey to net zero – and what could be a better benefit than that?
Don’t forget, the UK government is currently looking at the future of home heating in the UK. Gas boilers might be phased out in the coming years. But heat pumps have a bright future ahead.
If you've got more questions about heat pumps, why not head to the OVO Forum? The Forum is where our green community comes together to share their firsthand experiences of green living, and to help each other out. There are tonnes of discussions about every aspect of heat pumps, so why not get involved and join the conversation?
How we’re taking the carbon out of home heating
Here at OVO, we love heat pumps so much that last year we started running our Zero Carbon Heating Trial.
This involved installing low-carbon heating tech in the homes of hundreds of our members. We fitted heat pumps, hot water storage, and even some extra draught-proofing and insulation. And we can’t wait to share our findings with you!
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