Air source heat pumps: heating and hot water, drawn from the air outside.
Air source heat pumps designed around a heat-loss survey of your home, with government grants of up to £9,000 for eligible homes.
A heat pump works like a fridge in reverse.
Instead of burning fuel, an air source heat pump takes heat from the outside air and moves it into your home. It heats your radiators or underfloor heating, and your hot water, and it uses less electricity than the heat it produces.
Why homeowners switch
- Less reliance on oil, LPG and gas
- Protection from rising energy costs
- Heating and hot water from one system
- A discreet unit outside your home
How it works
- 1
Heat from the air
The outdoor unit draws in outside air and absorbs its heat into a liquid refrigerant.
- 2
Raised to a useful heat
Using electricity, a compressor increases the refrigerant’s temperature.
- 3
Into your heating
That heat is passed to your radiators or underfloor heating around the house.
- 4
And your hot water
Hot water for showers, baths and taps is stored in a cylinder until you need it.
No two homes the same
Will a heat pump work in
my home?
Most homes can be a good fit. What changes from home to home is the system itself, so we don’t fit the same heat pump everywhere. Each of these shapes the design.
Heat loss
How much heat each room needs decides the size of the system. Older homes aren’t ruled out: our case studies include a period home and a cottage.
DecidesThe size of the heat pump
Radiators or underfloor heating
Existing radiators can often be used if they’re compatible and there are enough of them. Underfloor heating works well with a heat pump.
DecidesWhether radiators are upgraded
Space outside
The outdoor unit needs a spot with good airflow. We look at where it will work best and how it sits beside your home.
DecidesWhere the unit goes
Hot water
A heat pump stores hot water in a cylinder, so we look at how much your household uses and where a cylinder can go.
DecidesThe cylinder you need
How you heat your home
Which rooms you use, when, and how warm you like them shapes how the system is set up and controlled.
DecidesYour controls and thermostats
Your current heating
Whether you’re replacing a gas or oil boiler, an old heat pump or no heating at all, we work with what’s worth keeping.
DecidesWhat’s replaced and what’s kept
How we work
Before recommending anything, we survey your property and calculate its heat loss.
Radiators or underfloor heating?
A heat pump can heat a home through either. Which suits you depends on what you have now, the floors and the rooms.
Radiator
Heat starts at the wall and spreads outwards from there.
Water-based underfloor heating
Warmth rises from across the whole floor area.
Illustrative only. Real room temperatures vary with floor finish, controls and the weather.
Lower temperatures
Heat pumps deliver heat at lower water temperatures than a boiler. A water-based underfloor system has a large surface to give that heat off from, so the two suit each other.
You can mix the two
Underfloor heating and radiators can share one heat pump, with some rooms on each. Existing radiators can often stay if they are compatible and there are enough of them.
The floor matters
Floor coverings change how much heat reaches the room. Tile lets it through readily, while thick carpet and underlay slow it down.
Already have underfloor heating?
One of our case studies below is a home with existing underfloor heating, now working with a heat pump. Tell us what your home has and we will say what works.
Costs, savings and grants.
The Boiler Upgrade Scheme can take thousands off the cost of an air source heat pump in England and Wales.
- Boiler Upgrade Scheme
£7,500
Boiler Upgrade Scheme
Towards an eligible air-to-water heat pump installation.
- Off-gas-grid homes
£9,000
Off-gas-grid homes
For eligible homes replacing oil or LPG heating. Available until 31 March 2027.
Not every home qualifies. Eligibility depends on your property and your current heating, and we check yours as part of your survey.
As an MCS certified installer, we apply for the grant on your behalf. Once the installation is finished the grant is paid to us, and it goes towards the cost of your new heating system.
Ask us whether your home qualifies for the grant.
What it costs
The price depends on your home: its size, how much heat it loses, and whether radiators, a hot water cylinder or controls need upgrading. Your proposal sets out the full cost and the grant, so you know what you’ll pay before anything is fitted.
What you could save
How much you save depends on the heating you’re replacing, how much heat your home needs and how you use it. We explain the likely running costs for your home when we survey it.
Surveyed, installed and supported by one team.
What’s involved when Carbon Saving Group fits your heat pump.
- Surveyed
Heat loss and placement
We calculate your home’s heat loss and recommend where the outdoor unit should go.
- Installed
Every part of the system
Our engineers handle the whole installation: the outdoor unit, hot water cylinder, controls, and new radiators where needed.
- Funded
Your grant, handled
As an MCS certified installer, we apply for the Boiler Upgrade Scheme on your behalf.
- Products
A-rated systems
We only install the latest A-rated products from industry-leading manufacturers.
- Established
Trading since 2015
A South West company with branches in Plymouth and Salisbury.
Heat pumps we’ve installed.
Three homes from our published case studies, each surveyed before we recommended a system.
Period home
Replacing an old, inefficient heat pump
- What we found
- The home was heated by an old air source heat pump.
- What we fitted
- Samsung monobloc heat pump with new radiators, programmers and thermostats.
EPC ratingF to D
Read the case study
Cottage
A first heating system
- What we found
- The cottage had no heating system, only solid fuel room heaters in a couple of rooms.
- What we fitted
- Daikin Altherma heat pump with a full new system of radiators and pipework.
Family home
From gas boiler to heat pump
- What we found
- The home was heated by an old, inefficient gas boiler, with existing underfloor heating.
- What we fitted
- Samsung Mono HT Quiet heat pump with a new hot water cylinder and programmers, working with the underfloor heating.
EPC ratingD to C
Read the case study*As estimated in the published case study, based on the property, its occupants and their behaviour. Results vary with every installation.
Common questions
Sometimes, yes. A heat pump can run with your existing radiators if they’re compatible and you have enough of them for the system to work efficiently. We check this at your survey.
Yes. Heat pumps suit the lower water temperatures of water-based underfloor heating, and can also run with compatible radiators. Floor coverings such as thick carpet reduce how much heat reaches the room, so the floor finish is worth checking. Which is right for your home comes out of the heat-loss survey.
Yes. A heat pump provides heating and hot water for your home. Hot water is stored in a cylinder until you need it.
Yes. A freezing night doesn’t mean a heat pump can’t keep your home warm. A correctly sized system, based on your home’s heat loss, is designed for the coldest days.
Modern units are designed to run quietly, and some models are certified for quiet operation. We also recommend where the outdoor unit should go.
The Boiler Upgrade Scheme offers £7,500 towards an eligible air-to-water heat pump in England and Wales, or £9,000 for eligible off-gas-grid homes replacing oil or LPG heating, until 31 March 2027. Eligibility depends on your property and current heating, and we check it at your survey.
It depends on your home and what needs upgrading, such as radiators, a cylinder or controls. Your proposal sets out the full cost and the grant before any work begins.
Talk to our team about your project.
- 01
Talk to an advisor
Request a callback and one of our advisors will talk through a heat pump for your home.
- 02
Survey and heat-loss calculation
We survey your property, calculate its heat loss and check your grant eligibility.
- 03
Your proposal
A full proposal with the recommended system, designs, specifications and the grant.
- 04
Installation
We install at a date that suits you and apply for your grant on your behalf.
Prefer to call?
0800 772 3572Or 01752 936 247, Monday to Friday 08:00 to 18:00, Saturday 08:00 to 16:00.