Air Source vs Ground Source Heat Pumps: Which Is Best for Your UK Home?

Quick Picks Summary#

For an in-depth understanding of these options, see our guide to heat pumps in the UK.

Introduction#

Choosing the right heat pump for your home can make a considerable difference in energy efficiency and cost savings. In the UK, both air source and ground source heat pumps offer good alternatives to traditional heating systems. Eligible homeowners can also benefit from the £7,500 Boiler Upgrade Scheme, making these options even more attractive, though you'll need an up-to-date EPC (opens in new tab) to qualify. For more information on this scheme, visit our heat pump installation grants guide.

Air Source vs Ground Source Heat Pumps Overview#

Heat pumps in the UK are gaining popularity due to their efficiency and environmental benefits. Air source heat pumps (ASHPs) extract heat from the air, while ground source heat pumps (GSHPs) use the ground as their heat source. Key considerations include cost, efficiency (measured by the Coefficient of Performance or COP), and space requirements. For detailed cost insights, check our ground source heat pump cost article.

How Each Type Works#

Air Source Heat Pumps#

Air source heat pumps draw heat from the ambient air, making them suitable for mild climates. They are relatively easy to install and are ideal for homes with limited outdoor space.

Ground Source Heat Pumps#

Ground source heat pumps use underground pipes to extract heat from the earth, providing consistent efficiency year-round. They require more installation space but tend to offer higher efficiency levels, especially in colder weather.

Installation Requirements and Disruption#

Air Source Heat Pumps#

• Pros:
  • Minimal space needed
  • Easier installation process
• Cons:
  • Potential noise issues
• Best for: Homes with restricted garden space

Ground Source Heat Pumps#

• Pros:
  • High efficiency
  • Quiet operation
• Cons:
  • Requires large garden space
  • More invasive installation
• Best for: Homes with spacious gardens

Cost Comparison (Installation and Running)#

Air Source Heat Pumps#

• Installation Cost: £8,000–£15,000
• Running Costs: Generally lower than traditional boilers

Ground Source Heat Pumps#

• Installation Cost: £15,000–£35,000
• Running Costs: More efficient, offering long-term savings

For more on installation costs, refer to our heat pump installation cost article.

Efficiency in Different Climates and Soil Types#

The performance of heat pumps can vary depending on climate and soil conditions. Ground source heat pumps offer stable efficiency even in colder climates, while air source heat pumps may experience reduced efficiency in extreme cold.

Space Requirements and Garden Impact#

Air Source Heat Pumps#

• Space Needed: Compact, suitable for urban environments

Ground Source Heat Pumps#

• Space Needed: Large garden required for horizontal loops or vertical boreholes

Noise Levels Compared#

Air Source Heat Pumps#

• Can be noisy, so careful placement is recommended

Ground Source Heat Pumps#

• Quieter due to underground components

Which is Best for Your Home?#

Consider factors such as garden space, budget, and local climate. Air source heat pumps are ideal for properties with limited space, while ground source heat pumps are better for those seeking efficiency and long-term savings. Our comparison of heat pump vs gas boiler costs offers further insights into cost differences.

FAQs About Heat Pump Types#

• What are the grant eligibility requirements? Eligibility often depends on income levels and geographical location.
• Are heat pumps efficient in cold weather? Ground source heat pumps maintain efficiency in colder climates, whereas air source heat pumps may see reduced performance.

Side-by-Side Comparison Table#

Sources/Further Reading#

• Energy Saving Trust
• GOV.UK Boiler Upgrade Scheme

For a complete overview, see our heat pumps category page.