Could a heat pump be
better for your home?
Heat your home and hot water without relying on a gas or oil boiler, with a government grant of up to £7,500 towards the cost of switching (up to £9,000 for qualifying homes heated by oil or LPG).
What is a heat pump?
A heat pump heats your home and hot water using energy from the air or ground outside.
Unlike a gas or oil boiler, it doesn’t burn fuel to create heat. It captures heat that’s already there, then uses electricity to bring it up to the temperature your home needs.
That’s what makes heat pumps so efficient. A well-designed system can deliver more than three units of heat for every unit of electricity it uses.
It works with radiators or underfloor heating, runs automatically and can replace your boiler as the main source of heating and hot water in your home.
No gas or oil needed
Heat your home and hot water without burning fuel.
More heat from the electricity you use
A properly designed heat pump can produce 3x or more heat energy for every unit of electricity it consumes.
Heating and hot water, all year round
Once installed, it takes care of your heating and hot water automatically, just like the system you’re used to.
Get a grant of up to £7,500
towards your new heat pump
The Boiler Upgrade Scheme gives up to £7,500 towards replacing your existing heating with a heat pump. If your home is heated by oil or LPG, the grant is up to £9,000 until March 2027.
We take care of the grant for you. As an MCS-certified installer, Gas Worx handles the application on your behalf. If your home qualifies, the funding is deducted from your installation price, so there’s nothing for you to claim back afterwards.
Warm Homes Loan Scheme. Government-backed low and zero-interest loans can help cover the rest of the cost. As a Warm Homes Loan Scheme eligible installer (we’re MCS certified for heat pumps, which the scheme requires), we’ll check what you’re eligible for.
*Funding and eligibility are determined by the Boiler Upgrade Scheme. Dual (hybrid) systems, where a heat pump works alongside a boiler, can’t get the grant. We’ll confirm the funding available for your property as part of your assessment.
What could a heat pump
cost for your home?
Enter your address for an instant estimate based on your property and EPC. You don’t need to know your heat loss, system size or any technical details.
Which heat pump is right
for your home?
For most homes, an air source heat pump is the simplest and most cost-effective option. But it isn’t the only one. The right system depends on your property, how you currently heat it and what you want to achieve.
Air source heat pump
The right fit for most homes. Lower upfront cost, quicker to install and no extensive groundworks required.
Ground source heat pump
Draws heat from the ground for consistent year-round performance. Installation costs more and requires suitable outdoor space, but it can offer excellent efficiency and a longer system life.
Dual system
Pairs a heat pump with your existing boiler, allowing the two systems to work together. It can be a practical option where replacing the boiler completely doesn’t make sense.
Not eligible for the Boiler Upgrade Scheme grant.
We’ll assess your home and explain which setup makes the most sense before you spend anything.
Your price, confirmed
after a home visit
With a government grant of up to £7,500 (up to £9,000 for qualifying homes heated by oil or LPG), switching to a heat pump can cost less than many homeowners expect.
Every property is different, so the price depends on the system your home actually needs. We visit, work out exactly what that is and give you a fixed written quote before you decide.
Boiler Upgrade Scheme, up to £9,000 for oil or LPG homes*
Written quote after your home visit
Available over 12 months*
What affects the price?
Your home determines the system. Its size, heat loss and existing heating setup all affect what needs to be installed. We’ll also check whether any radiators need upgrading, your hot water cylinder, existing pipework and the right position for the outdoor unit.
We measure every room. On the home visit we scan each room with LiDAR, capturing its size and windows to build an accurate profile of your home. From that we work out its heat loss and size the heat pump correctly, rather than guessing.
We work all of that out before giving you a fixed quote, so you know exactly what you’re paying before the installation begins.
Making the switch more affordable
- Government grant of up to £7,500*
Up to £9,000 if your home is heated by oil or LPG. We handle the application and deduct the funding from your installation price. - Warm Homes Loan Scheme
Government-backed low and zero-interest loans can help spread the cost. We’ll check what you’re eligible for. - Finance available*
0% APR finance over 12 months, or 12.9% APR finance over 36, 48, 60 or 120 months, through our partner Ideal4Finance. - No separate survey or design fee
Everything needed to properly assess and design your system is included.
Spread the cost with
monthly payments
0% APR finance over 12 months, or 12.9% APR finance over 36, 48, 60 or 120 months, through our partner Ideal4Finance. Always subject to the lender’s assessment.*
At least 325% efficiency.
Or your money back.*
We don’t just tell you your new heat pump should be efficient. On qualifying installations, we put a number on it.
Before you commit, we agree a minimum efficiency target of 325% with you in writing. If your system fails to achieve the agreed performance under the stated measurement and operating conditions, our money-back guarantee applies.
Designed for 326%.
Running at 370%.
This is a home in Whiteley, Hampshire: a four-bed detached house built in 2022, 129 m², which came with a 35 kW gas combi boiler. We replaced it with a Vaillant aroTHERM plus 3.5 kW heat pump, designed and fitted the Gas Worx way, then read the results off the controller.
A year in this home: estimate vs real performance
| Per year | Design report | At real performance |
|---|---|---|
| Heat supplied | 13,039 kWh | 13,039 kWh |
| Electricity used | 4,001 kWh | 3,524 kWh |
| Heat pump running cost | £821 | £723 |
| Saving against gas heating | £446 | £544 |
That’s around £98 a year more saving than the report expected, using about 12% less electricity for the same amount of heat.
The last complete year
The system delivered 8,297 kWh of heat using 2,296 kWh of electricity. That cost £471 to run, against £806 for the same heat from gas: a saving of £335.
The saving is smaller than the estimate because the house needed less heat than the report assumed.
A bonus: we designed it with a much higher flow rate, so two or three showers can run at once. A gas combi gives around 15 litres a minute: one shower at a time.
Performance figures are Vaillant controller readings. 3.70 covers the total recorded period (18,413 kWh of heat for 4,976 kWh of electricity); the last complete year achieved 3.61. The £723 and £544 figures are projections using that recorded performance. Costs assume electricity at 20.53p/kWh, gas at 7.97p/kWh and an 82% efficient gas boiler, and exclude standing charges. Every home is different: your own design report gives your figures.
Keep your heat pump
running at its best
We’re not just your installer. We’re the team that looks after the system afterwards.
Your heat pump should keep performing long after the installation is finished.
Our care plans start from £16 a month and include the annual servicing needed to keep your system efficient, reliable and its warranty maintained, with support from the Gas Worx team if you need us.
- Annual heat pump and cylinder service
- Full safety and performance check
- Priority support available on selected plans
The questions worth asking
before you switch
Will a heat pump work in an older home?
Often, yes. The age of your property doesn’t decide whether a heat pump will work well. What matters is how much heat your home loses and whether the heating system can deliver enough warmth at lower temperatures.
Some older homes may need larger radiators or other changes. We’ll identify exactly what your property needs during the assessment and explain it before you decide whether to go ahead.
Will a heat pump actually lower my energy bills?
It can, but we wouldn’t promise that without looking at your home and what you currently spend.
Your running costs depend on how efficiently the system performs, your electricity tariff, the heating system you’re replacing and how you use your heating. We’ll model the expected performance of your system so you can make the decision with realistic figures.
Will I need new radiators?
Not necessarily.
Heat pumps generally run at lower temperatures than traditional boilers, so some radiators may need to be larger to heat the room effectively. We calculate this room by room and only recommend changing the radiators that actually need it.
How do I check how efficient my heat pump is?
Your heat pump’s controller shows two figures: Environmental Yield (the heat it has taken from the air) and Power Consumption (the electricity it has used). Add them together, then divide by the Power Consumption. The answer is your COP (coefficient of performance).
For example, with a heating Environmental Yield of 1,427 kWh and a Power Consumption of 631 kWh: (1,427 + 631) ÷ 631 = 3.26. That means 3.26 kWh of heat for every 1 kWh of electricity, or 326% efficiency.
How disruptive is the installation?
Most of the work is carried out over a matter of days, but the amount of disruption depends on what needs changing inside your home.
If radiators, pipework or your hot water cylinder need upgrading, there will naturally be more work involved. We’ll explain exactly what your installation involves before it starts, including how long we expect it to take.