Air Source vs Ground Source Heat Pumps
Choosing between air source and ground source heat pumps can feel like a tough decision, so how do you know you're making the right choice? Taking time to thoroughly understand the benefits and how they work is a key step towards upgrading your home's heating systems.
This blog will cover how heat pumps work, the differences between air and ground source systems, and provide advice on choosing the right pump for you.
How Do Heat Pumps Work?
Heat pumps are a smart, energy-saving way to warm your home, providing an eco-friendly alternative to regular boilers. They work by moving heat from outside into your house, similar to how a refrigerator takes heat out, but in reverse.
Depending on the kind of heat pump, they get heat from the air or the ground, then compress it to make it hot enough for heating. Heat pumps can be used for space heating, underfloor heating, and even for hot water, making them a flexible and environmentally friendly option.
What is the Difference between Air Source and Ground Source Heat Pumps?
Air Source Heat Pumps (ASHP): These systems extract heat from the outside air, even in cooler temperatures. They are installed on an external wall and are relatively quick and easy to set up. ASHPs are often more affordable to install and are suitable for a wide range of properties.
Ground Source Heat Pumps (GSHP): GSHPs extract heat from underground pipes, making them more efficient than ASHPs due to the stable ground temperature. However, they need more space and have higher initial costs for excavation.
| Feature | Air Source Heat Pump | Ground Source Heat Pump |
|---|---|---|
| Heat Source | Extracts heat from the air outside | Extracts heat from the ground |
| Efficiency | Slightly lower efficiency in colder climates | Consistently high efficiency, regardless of weather |
| Space Requirements | Requires minimal outdoor space | Requires significant land area for ground loops |
| Maintenance | Easier and less invasive to maintain | Minimal maintenance once installed |
| Operating Noise | Produce noise levels ranging from 40–60 decibels | Typically produce noise levels between 40–42 decibels |
| Lifespan | 15-20 years with proper care | 20-25 years or more with proper care |
| Environmental Impact | Lower carbon emissions compared to fossil fuels | Even lower emissions due to higher efficiency |
Which Should I Choose?
The choice between air source and ground source heat pumps depends on your property and heating needs:
- Air Source: Ideal for urban or smaller properties with limited outdoor space. These pumps are also better suited for mild climates and properties with well-insulated walls and roofs.
- Ground Source: A great choice for rural homes with ample outdoor space. If you’re planning a long-term investment in renewable heating, GSHPs may offer greater savings due to their efficiency.
Our experts at Liverpool Heating can help you assess your property and lifestyle to determine the best fit.
Cost of Installation
When comparing the installation costs of air source heat pumps (ASHPs) and ground source heat pumps (GSHPs) in the UK for 2025, there is a significant difference, mainly due to the complexity and groundwork required for GSHPs.
Air Source Heat Pump Costs
- Typical installation cost (supply and fit):
£12,400 up to £25,000, with most average-sized homes seeing costs around £14,000 - £16,500. - Additional costs:
Upgrades to radiators, pipework, or insulation may add several thousand pounds. - Government grants:
Up to £7,500 available via the Boiler Upgrade Scheme for eligible homes.
Ground Source Heat Pump Costs
- Typical installation cost (supply and fit):
£16,200 – £49,000, with averages for a standard 3–4 bedroom home between £22,000–£34,000. - Horizontal installation:
£16,200 – £31,000, depending on house size and system output. - Vertical installation:
£23,000 – £49,000, due to the higher cost of drilling deep boreholes. - Government grants:
Also eligible for up to £7,500 from the Boiler Upgrade Scheme
Install Heat Pumps With Liverpool Heating
At Liverpool Heating, we specialise in the installation of heat pumps. Our team will guide you through every step, from assessing your property to choosing the ideal system, ensuring a seamless installation process.
Our team is committed to energy efficiency and customer satisfaction. We’re here to help you make the switch to sustainable heating as easily as possible. Get in touch with Liverpool Heating today to explore your options.