Air Source & Ground Source Heat Pumps

In an era where sustainability and environmental consciousness are paramount, the demand for efficient heating and cooling solutions has escalated. Air source and ground source heat pumps have emerged as top contenders in the race to reduce carbon footprints while providing comfortable indoor environments. In this article, we'll explore the benefits, differences, and key considerations for choosing between air source and ground source heat pumps.

Understanding Heat Pumps

Heat pumps are revolutionary devices that use a small amount of energy to move heat from one location to another. They work on the principle of heat transfer, leveraging the natural heat present in the air or ground to provide warmth during the colder months and cooling during the summer.

Advantages of Air Source Heat Pumps

Air source heat pumps (ASHP) are popular for several compelling reasons:

a. Energy Efficiency: ASHPs can generate up to three times more energy than they consume, making them highly energy-efficient and cost-effective in the long run.

b. Easy Installation: Installation of ASHPs is relatively simple, requiring less disruption to the property and reduced installation costs compared to ground source heat pumps.

c. Versatility: ASHPs can be installed in various locations, making them suitable for both urban and rural settings.

d. Eco-Friendly: Utilising renewable energy from the ambient air, ASHPs produce minimal greenhouse gas emissions, reducing your carbon footprint.

Advantages of Ground Source Heat Pumps

Ground source heat pumps (GSHP), also known as geothermal heat pumps, utilise the constant temperature of the earth to heat and cool buildings. Their benefits include:

a. Exceptional Efficiency: GSHPs are highly efficient, as they tap into the earth's stable temperature, providing a reliable and consistent heat source.

b. Longevity: GSHPs have a longer lifespan compared to ASHPs, often lasting for decades with minimal maintenance.

c. Reduced Noise: GSHPs are quieter during operation, providing a more peaceful environment.

d. No Visual Impact: The system is entirely underground, ensuring no impact on the aesthetics of the property.

Key Considerations for Choosing the Right Heat Pump

a. Geographic Location: The climate and geological features of the area influence the suitability of the heat pump type. ASHPs are more efficient in moderate climates, while GSHPs perform better in colder regions.

b. Installation Costs: ASHPs generally have lower installation costs compared to GSHPs, which require more groundwork and drilling.

c. Energy Efficiency: Evaluate the seasonal performance coefficient (SPF) and coefficient of performance (COP) to gauge the heat pump's energy efficiency. Both ASHPs and GSHPs should have high COP and SPF values.

d. Available Space: The size of your property will determine the feasibility of installing either type of heat pump. GSHPs may require more land space for the ground loop system.

e. Renewable Heat Incentives (RHI): Research the government incentives and grants available for renewable heating systems, as this can significantly reduce the overall cost of the installation.


Air source and ground source heat pumps are exceptional alternatives to conventional heating and cooling systems, offering remarkable energy efficiency and environmental benefits. While air source heat pumps are easy to install and versatile, ground source heat pumps boast higher efficiency and longevity. Selecting the appropriate system depends on various factors such as location, installation costs, and available space. Whichever option you choose, investing in a heat pump is a step towards a greener future and a more sustainable home.


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