What is a heat pump?
Heat pumps are highly efficient, renewable energy home heating systems. They transfer heat from one source location (soil, water or air) to another heating the radiators and hot water in your home.
A well designed heat pump system will keep you and your family warm even in the depths of winter and they’re perfect for the UK climate. They are quiet, easy to use, and don’t need much maintenance once installed.
The benefits of installing a heat pump:
- Heat pump grants – The government is currently offering a grant of £7,500 towards the cost of installing an air source heat pump for eligible households
- Highly efficient – Heat pumps can produce up to three units of heat for every unit they use. This and makes them highly efficient. (4).
- Long service life – an air source heat pump should last for 20+ years
- Versatile – Suitable for many types of homes, heat pumps provide both heating and hot water.
- Low carbon – Reduce your home’s carbon footprint by up to 44% compared to a gas boiler.

How does a heat pump work?

Heat pumps transfer existing energy from one place to another.
This is why they’re so efficient. This process can achieve over 300% efficiency, meaning 1kW of electricity can produce more than 3kW of heat. Here’s how the cycle works:
- A refrigerant circulates through an evaporator (similar to a car radiator)
- A fan draws air across the evaporator, transferring energy to the refrigerant
- This energy causes the refrigerant to boil and turn into vapour
- The vapour is compressed, which generates heat
- The hot vapour passes through a condenser, transferring heat to your home’s water circulation system
- The refrigerant then passes through an expansion valve, cooling it down for the cycle to begin again
The different types of heat pump

Ground source heat pumps
These systems extract heat from the ground via buried pipes filled with a water-antifreeze mixture. The pipes are installed either through deep boreholes or in shallow trenches with coiled “slinky” pipes.

Water source heat pumps
Instead of soil, these systems extract heat from water sources like aquifers, lakes, or rivers. They can use either closed loops (pipes) or open systems that draw water directly.

Air source heat pumps
These increasingly popular systems extract heat directly from outside air. A fan draws air over an evaporator coil containing refrigerant.
Myth busting heat pumps

Noise
You might be surprised by just how quiet an air source heat pump is.
Like any machine in operation, air source heat pumps do produce noise – it’s about the same as a whisper, the gentle hush of a library, or the sound of a breeze through leaves.

Radiators
You don’t always need to replace your radiators. We’ll identify if your current radiators are suitable for a heat pump is part of our design process. We’ll answer any questions you’ve got and help you with all the you need before going ahead. Don’t worry, we’ll guide you every step of the way.

Warm
Your heat pump will keep you warm every winter.
Your air source heat pump is perfect for the UK climate. It will still operate when outside temperatures are as low as -15°C. It may work a little harder but you will still be warm and cosy in your home.
Benefits of heat pumps
Air source heat pumps offer significant benefits compared to other methods of home heating.

Highly efficient
Up to 300% more efficient than a traditional boiler (4)

Grants
You could qualify for a £7,500 grant from the government (2)

Reduce carbon
Reduce carbon emissions by up to 70% (5)

Save money
Save up to £290 on your energy bills (6)

Always warm
Stay warm all year round with our Heat Pump Promise (7)
What our customers say
How much does a heat pump cost?

A heat pump could more affordable than you think.
There are a range of options available to you to help with the cost of your heat pump:
- The Government’s £7.5k Boiler Upgrade Scheme grant (eligibility checks apply).
- Finance options over 5 and 10 years with manageable monthly payments.
- Incentives from your mortgage provider.
Getting it right at the start of the process, means you’ll have a system you will be happy with that fits your needs.
Spread the cost with monthly payments
(Subject to status and affordability)
A finance package means you could spread the cost of your air source heat pump installation with manageable monthly payments. Below is an illustrative example of what your typical repayments could look like over 5 or 10 years.
Finance available at a fixed 0% or 9.9% APR, subject to status and credit check. The amount to be financed will vary depending on the heat pump required for your property and your chosen deposit.
Example
10-year finance plan monthly payments- Cash price: £11,499
- Government grant (BUS): £7,500
- Balance: £3,999
- Deposit (15%): £599.85
- Credit amount: £3,399.15
- Interest: £1,469.88
- Total amount payable (inc. deposit) £5,468.88
- Number of repayments: 120
- APR: 7.9%
- Monthly payment amount: £40.58
Example
5-year finance plan monthly payments- Cash price: £11,499
- Government grant (BUS): £7,500
- Balance: £3,999
- Deposit (15%): £599.85
- Credit amount: £3,99.15
- Interest: £699.88
- Total amount payable (inc. deposit): £4,698.95
- Number of repayments: 60
- APR: 7.9%
- Monthly payment amount: £68.32
Example
2-year finance plan monthly payments- Cash price: £11,499
- Government grant (BUS): £7,500
- Balance: £3,999
- Deposit (15%): £599.85
- Credit amount: £3,399.15
- Interest: £0.00
- Total amount payable (inc. deposit): £3,999
- Number of repayments: 24
- APR: 0%
- Monthly payment amount: £141.63
Important information
Finance is subject to eligibility, status, and affordability checks. UK residents aged 18 or over only.
Deposit required: minimum 15%, maximum 25%.
Prices shown include the Boiler Upgrade Scheme (BUS) grant, subject to eligibility and approval by Ofgem. We do not receive any commission or incentive for introducing you to our finance provider. You are free to choose your own finance option.
Failure to keep up with repayments may effect your credit rating.
CB Heating Ltd trading as EDF Heat Pumps is a company registered in England and Wales, Company number 09885603, Registered office, Nova North, 11 Bressenden Place, London, SW1E 5BY.
CB Heating Ltd trading as EDF Heat Pumps is also an Appointed Representative of Shermin Finance Limited, Company number 01276121, Registered office, HomeServe, Cable Drive, Walsall, England, WS2 7BN.
Authorised and regulated by the Financial Conduct Authority, FRN 727594. Shermin Finance Limited acts as a credit broker and is not a lender - they can introduce you to a panel of finance providers and do not charge fees for their Consumer Credit services.
Your heat pump questions answered
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What is a heat pump?
Air source heat pumps are a clever bit of kit. They use the air outside to heat your home and your hot water — even when it’s freezing. They’re quiet, easy to use, and don’t need much looking after once they’re installed. Plus, they could help you save on your energy bills.
Read our article to discover more about air source heat pumps.
Are heat pumps noisy?
Like any machine, heat pumps make some noise. However, you might be surprised by how quiet they are. Most heat pumps generate sound that is same as the gentle hush of a library or the sound of breeze through the leaves of a tree.
Are heat pumps efficient?
Air source heat pumps are one of the most efficient heating systems for your home. They can generate up to 3 times the amount of heat for every kw of energy used. This makes them highly efficient compared to your traditional gas boiler. Heat pumps are sustainable and could also help you save energy.
How much will a heat pump cost?
Installing a heat pump isn’t as simple as swapping out a gas boiler — there’s a bit more to it to make sure it works properly for your home. To give you an accurate quote, we’ll need to go through a few things that can affect the cost, including:
The size of your house
Your current heating and hot water system
How much heat and hot water you actually use
How much heat your home loses
Your current radiators
Any grants you might be eligible for
Finance options available to you
Getting all this information upfront means we can give you a realistic price, with no nasty surprises down the line.
What's included in my quote?
You quote from us will include full costs for the following:
- Installation and set up by one of our expert installers
- Technical assessment and system design
- Your £7.5k Boiler Upgrade Scheme grant (We will apply for this for you on your behalf if you are eligible)
- Heat pump, water cylinder and controls
- Your supplier specific waranty details
- Plumbing and electrical supplies required for your installation
- Any radiator upgrades you’ve been quoted for
- Your EPC and MCS registration certificates
- 2 year warranty on all other parts
- Dedicated support team, from quote to post install.
All our installations are completed in line with MCS standards.
What's not included in my quote?
We are unable to provide you with quotes for the following:
- Site preparation and groundworks – If required, you will need to arrange this prior to installation
- Planning permission – if your heat pump requires planning permission, you will need to apply for this from the local authority
- Scaffolding – If your installation requires scaffolding, you will need to arrange a contractor to provide this
- Fuse or service upgrades – We will talk to your Distribution Network Operator (DNO) to see if any upgrades are required. You will need to authorise any upgrades before they can be carried out.
- Underfloor heating – We do not provide underfloor heating as part of your heat pump installation. You will need to arrange a separate contractor for this.
How do I get the £7.5k heat pump grant?
If you are eligible for the Boiler Upgrade Scheme, we will apply for this for you.
You can find the BUS scheme eligibility criteria here. We take care of all the paperwork and applications. You won’t have to worry about it!
Will a heat pump lower my energy bills?
There are a number of ways you could save money on your energy bills with an air source heat pump.
You could unlock £351 in savings with EDF Energy’s Heat Pump & Save Tracker and benefit from no standing charge for a year and twice-daily discounts.
To take advantage of this tariff, you will need to contact our colleagues at EDF directly.
You should also consider the following:
- Installing solar panels and batteries on your property
- Ensuring your property has any extra insulation
You could save up to £290 a year on your energy bills by replacing an old G-rated gas boiler. If you replace a new A-rated gas boiler, your energy bills may stay about the same.
Source: The Energy savings Trust: Potential annual savings of installing a standard air source heat pump in a three bedroom semi-bedroom detached home in Great Britain, with radiator upgrades as needed.
Do I need to replace my radiators?
Not always, no.
However, if you do not replace unsuitable radiators, your heat pump may not work as efficiently as possible. Heat pumps operate at a lower flow temperature to traditional gas boilers. This is one of the reasons they are so highly efficient. To maximise efficiency, heat pumps require radiators with as large a surface area as possible.
How much room does a heat pump need?
When installing a heat pump, you’ll need a bit of space outside your home for the external unit, as well as some room inside for a hot water cylinder.
Don’t worry, our expert team will work with you to design a system that fits your home perfectly. We’ll consider the layout of your property, your heating needs, and how to make the system as efficient as possible. That way, you get the best heat pump system for you and your family’s needs.
I’m planning a renovation or extension; can I still get a heat pump?
Yes!
Our team can take your house plans and use them to design a heat pump system that works perfectly for your home.
We’ll look at the layout, your heating and hot water needs, and the most efficient way to set everything up. Get in touch today, and we’ll guide you through the whole process, answer any questions you have, and make sure you know exactly what to expect from start to finish.”
Will a heat pump keep me warm in winter?
Air source heat pumps are perfectly suited to the UK climate. Even when temperatures drop really low, they’ll keep your home warm and comfortable. They might work a little harder in the coldest weather, but you can still enjoy a cosy home without worrying about your heating.
Our team takes care to install your heat pump correctly and efficiently, so you get the best performance possible. We’ll guide you through how it works, how to get the most from it, and answer any questions along the way giving you peace of mind that your home heating is in expert hands
What’s more, our heat pump installations are backed up by our Heat Pump Promise. So, if your heat pump doesn’t work as promised, we’ll give you a refund.
NOTES
Indicative pricing
1. The price above reflects the £7,500 government boiler upgrade scheme and is based on our lowest priced heat pump, cylinder and controls. The figure quoted does not reflect any radiator upgrades that may be required. Your individual quote will be specific to you and your requirements may rise depending on the system required to suit your home.
Boiler upgrade scheme
2. Eligibility checks apply. Visit the UK Government website for details.
A typical customer can save £164 per year versus the current single-rate price cap tariff. This is based on the following;
3. Savings are based on a customer using Ofgem’s typical domestic consumption of 2700 kWh electricity and with heating provided by an ASHP with COP of 3.1 providing equivalent heat to that from a 94% gas boiler using 11,500 kWh of gas.
Save £260 per year
4. The Energy Saving Trust: Figures are based on fuel prices as of July 2025. Find out more about how we made these calculations. The running cost you can expect will depend on the size of your home, any heating system upgrade and any saving will also depend on the fuel type being replaced. You can expect the saving to range between old and new, depending on the age of your current heating system.
Efficiencies
5. Heat Pump investment roadmap, UK Government
The Heat Pump Promise
6. With our Heat Pump Promise if your heat pump doesn’t perform as promised, we’ll give you a refund. Terms & Conditions apply


