Eco4 had recently completed EWI at my house. All the workmen are very professional, polite and knowledgeable. I have already referred to my friends and family and definitely recommend this company to all for work. Communication was excellent.
ASHP & Solar PV
Eco4 Pro Offers
Energy-Efficient ASHP & Solar PV Systems Available for UK Households
An air source heat pump is a device that can heat your home by drawing from the outside air. The most often used type of heat pump installed in the UK.
How does an air-to-air heat pump work?
An air source heat pump (ASHP) transfers heat between the outside and inside of a building to provide heating or cooling. It’s a form of renewable heating that takes cold from the air and operates the exact same way as a refrigerator, which is by the use of refrigeration.
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How it works
1
1
A refrigerant circulating through the expansion device is converted to a low-pressure liquid/vapor mixture.
2
2
The refrigerant travels to the outdoor coil, which extracts heat from the air and evaporates into a low-temperature vapor.
3
3
The vapor goes to the compressor, which returns it to ambient pressure and temperature.
4
4
The hot gas passes inside the indoor coil, transferring heat to the air. The refrigerant liquefies again and returns to the expansion device to repeat the cycle.
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Benefits
Environmentally friendly
Leading Air-source heat pumps may be a green way to heat and cool your home.
May save money
Air source heat pumps can help lower your heating bills over time.
Can reduce your carbon footprint
Air source heat pumps can decrease your contribution to global warming.
Types
Monobloc:All components are in a single outdoor unit.
Split:The heat pump is separated into indoor and outdoor units.
Things to Consider
1You might need to install better insulation, pipes and radiators in your home.
2You might need a hot water cylinder for hot water storage.
Installation Costs
1. The average cost of an air source heat pump may be the maximum.
2. Toward the cost of installing an air source heat pump. The Boiler Upgrade Scheme grant offer can contribute.
Advantages of Air Source Heat Pumps for You
We care about green energy , and we want everyone to be able to access it. That’s why we give free guidance and assistance on air source heat pump loans: You deserve to benefit from this game-changing technology.
Visit our Eco4 Pro site now to find out more about Air source heat pump grants and how they can save you money and help the environment. Our team’s talented experts are standing by to provide support and to help you discover your best grant opportunities easily and efficiently.
Air Source Heat Pumps Explained
Smart, Efficient Renewable Heating
Air source heat pumps (ASHPs) extract free heat energy from outside air — even at sub-zero temperatures — to warm your home and water at a fraction of the running cost of fossil-fuel boilers.
300-400%
Efficiency vs. 90% for gas boilers
15-20 yrs
Typical operational lifespan
7 years
Manufacturer warranty (standard)
-15°C
Still works at this outdoor temp
How an ASHP Works
1
Heat Absorbed from Air
A fan draws in outdoor air. Refrigerant inside the unit absorbs the heat — even when it is cold outside.
2
Compressor Boosts Heat
The refrigerant is compressed, which raises its temperature significantly — to useful heating levels.
3
Heat Transferred to Water
A heat exchanger transfers the heat into your home heating circuit — radiators, underfloor heating, hot water cylinder.
4
Cycle Repeats
The refrigerant returns to a liquid state and the cycle begins again — quiet, continuous, efficient.
ASHP vs Gas Boiler — At a Glance
| Feature | Air Source Heat Pump | Gas Combi Boiler |
|---|---|---|
| Efficiency | 300-400% (COP 3-4) | ~90% |
| Carbon emissions | Very low — and falling as grid greens | High — burns fossil gas |
| Lifespan | 15-20 years | 10-15 years |
| Running cost | Lower (esp. with solar PV or off-peak tariff) | Rising with gas prices |
| Government support | ECO4 grants, BUS grants available | None |
| Future-proof | Yes — aligned with UK net-zero policy | No — gas boiler bans phased in from 2035 |
Key Benefits
3-4× more efficient
For every 1 kWh of electricity used, an ASHP delivers 3-4 kWh of heat.
Lower running costs
Especially when paired with insulation upgrades or solar PV.
Renewable & clean
Uses ambient air — no fossil fuel burning at point of use.
Heating + hot water
One system handles both — no separate hot water cylinder needed (in some setups).
Low maintenance
Annual service is enough — no flue checks, no carbon monoxide risk.
Quiet operation
Modern units operate at around 40-50 dB — quieter than a fridge.
Considering an Air Source Heat Pump?
Our MCS-certified installers will assess your home, calculate proper sizing, and check your eligibility for ECO4 funding.
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What Our Customers Say
Real feedback from real homeowners across the UK — sourced from Google Reviews and Trustpilot.
I recently had a new boiler installed by ECO4 Pro Ltd, and I couldn’t be happier with the entire process. From the initial consultation to the final installation, the team demonstrated professionalism, efficiency, and outstanding customer care.
They did an amazing job on my property. The staff was professional and very fast as well. When doing the work, they ensured to install the floor protectors so our flooring doesn’t get damaged. Highly recommended.
Was a pleasure dealing with Eco4, particularly Khalil and Khaliq, always helpful and available when you needed to ask them something. Work carried out was great and if I ever have any issues, I know I can get in touch with them quickly and it’ll be resolved very quickly. Would highly recommend.
Excellent communication from staff from start to finish. Workers were punctual and respectful. Work was carried out to a high degree and the workers cleaned up when they left.
Eco4 had recently completed EWI at my house. All the workmen are very professional, polite and knowledgeable. I have already referred to my friends and family and definitely recommend this company to all for work. Communication was excellent.
They responded very quickly to our request for a quote and within a week they started work. They were responsive to our requests and professional in their approach to the work.
I recently had a new boiler installed by ECO4 Pro Ltd, and I couldn’t be happier with the entire process. From the initial consultation to the final installation, the team demonstrated professionalism, efficiency, and outstanding customer care.
Common Questions
Frequently Asked Questions
Learn more about Air Source Heat Pumps and how they can benefit your home.
You can even utilize the heat it absorbs from the air to heat your home or water, even when it’s chilly outside.
Yes — by converting energy into heat very efficiently, an air source heat pump can help reduce your heating bills over time. Actual savings will depend on the age and efficiency of the system being replaced.
These will work well in well-insulated homes with some space allocated for the installation.
A professional can typically do it in two or three days.
If you look after it, it can be worth some love, 15 – 20 years or so.
Yes, it does. It relies on green energy, and therefore makes a huge cut in carbon pollution.
Yes, they are designed to extract heat even when cold outside.
Like any fine instrument, it requires occasional attention and professional service from time to time to keep it running well.
It needs regular checks and professional service every once in a while to keep it going well.
Yes, a unique system is located outside, and all of a split system is both outside and inside.