The Complete Guide to Air Source Heat Pumps
Air source heat pumps are becoming an increasingly popular heating solution for homeowners looking to reduce energy bills and cut their carbon footprint.
As a trusted installer in Devon, Dorset, and Somerset, Evergreen Renewables delivers this comprehensive guide to cover everything you need to know about air source heat pumps: including costs, efficiency, maintenance, and available incentives.
What is an air source heat pump and how does it work?
An air source heat pump (ASHP) extracts heat from the outside air, even in temperatures as low as -20°C. It works similarly to a refrigerator, but in reverse. The pump absorbs heat from the air, compresses it to increase the temperature, and then transfers this warmth into your home's heating.
This heat can be used for radiators, underfloor heating, or to provide hot water. Despite requiring some electricity to operate, air source heat pumps generate far more energy than they consume, making them a highly efficient heating solution.
Are air source heat pumps efficient in the UK climate?
Yes, air source heat pumps are highly efficient in the UK's mild climate, even in colder months. Modern systems, such as the Mitsubishi Ecodan Ultra Quiet Air Source Heat Pump, are designed to perform well at temperatures as low as -20°C.
Since these systems extract heat from the air rather than relying on fuel, they maintain impressive efficiency throughout the year, reducing both energy consumption and CO2 emissions.
How much does it cost to install an air source heat pump?
The cost of installation can vary depending on the size of your property and the complexity of the system. On average, homeowners in Devon, Dorset, and Somerset can expect to pay between £7,000 and £13,000 for a fully installed system.
Evergreen Renewable Energy offers expert guidance to help you find the right solution for your home, ensuring optimal performance and energy savings.
What are the running costs of an air source heat pump?
Air source heat pumps are designed to be highly efficient, helping to reduce your energy bills. While exact costs depend on your home’s insulation, size, and heating needs, ASHPs typically offer lower running costs compared to traditional oil or electric heating systems.
By combining an air source heat pump with solar panels or battery storage, you can further reduce reliance on grid electricity, cutting costs even more.
Do I need planning permission for an air source heat pump installation?
In most cases, air source heat pumps are classed as permitted development, meaning you won’t require planning permission. However, there are some exceptions, particularly for listed buildings or properties in conservation areas.
Evergreen Renewable Energy can advise you on planning regulations to ensure your installation meets all requirements.
Can an air source heat pump heat my entire home?
Yes, air source heat pumps can effectively heat your entire home when correctly sized and installed. Evergreen’s experienced engineers will assess your property's heating needs to design a system that provides consistent warmth and reliable hot water.
For larger homes, combining an air source heat pump with underfloor heating or improved insulation can enhance efficiency and comfort.
How noisy are air source heat pumps?
Modern air source heat pumps, such as the Mitsubishi Ecodan Ultra Quiet, are designed to operate at low noise levels. These systems are carefully engineered to meet strict noise regulations, making them suitable for residential properties.
With correct installation, noise levels are comparable to a standard household fridge.
What maintenance do air source heat pumps require?
Air source heat pumps require minimal maintenance. To ensure peak performance, it's recommended to:
Keep the outdoor unit clear of debris
Clean filters regularly
Arrange an annual service with a certified engineer
Evergreen Renewable Energy provides ongoing support and servicing to keep your heat pump performing efficiently for years to come.
Are there government grants or incentives for installing air source heat pumps?
Yes, the Boiler Upgrade Scheme (BUS) offers grants of £7,500 towards the installation of air source heat pumps. This government-backed scheme is available to homeowners in Devon, Dorset, and Somerset who meet the eligibility criteria.
As MCS-certified installers, Evergreen Renewable Energy can help you access these incentives and guide you through the application process.
How long do air source heat pumps last?
A well-maintained air source heat pump typically lasts between 15 to 20 years. Choosing a high-quality ASHP ensures long-term reliability and excellent performance.
How can we help?
As MCS-certified installers of Air Source Heat Pumps, Evergreen Renewable Energy combines expert knowledge with years of experience. Serving East Devon, West Dorset, and South Somerset, our team ensures professional installation, ongoing support, and advice with your home’s needs in mind.
If you're considering an air source heat pump for your home, contact Evergreen Renewable Energy today for expert guidance and a no-obligation quote.
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Posted on March 27th 2025
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