Air Source vs Ground Source Heat Pumps

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Differences Between Air Source and Ground Source Heat Pumps

Air source heat pumps (ASHPs) and ground source heat pumps (GSHPs) vary in several ways. These include installation, efficiency, cost, and suitability. Let’s break down the main differences between them.

Installation

  • Air Source Heat Pumps (ASHPs):
    ASHPs are easier and cheaper to install. They need less space. They are mounted outside, like an air conditioner. This makes them good for properties without much land.
  • Ground Source Heat Pumps (GSHPs):
    GSHPs need groundworks for underground pipes. These pipes can be horizontal or vertical. Installation costs are higher. More space is required. Sometimes, planning permission is needed.

Efficiency

  • Air Source Heat Pumps (ASHPs):
    ASHPs work less efficiently when outdoor temperatures drop. The colder the air, the harder they work. This can lower their efficiency in cold climates.
  • Ground Source Heat Pumps (GSHPs):
    GSHPs are more efficient overall. They use the stable temperature underground. This makes them perform consistently all year round, no matter the weather.

Cost

  • Air Source Heat Pumps (ASHPs):
    ASHPs are cheaper upfront. Installation costs are usually between £12,000 and £16,000. Many qualify for government grants, which cover a large part of the cost.
  • Ground Source Heat Pumps (GSHPs):
    GSHPs cost more because of the groundworks required. Costs range from £25,000 to £45,000. While grants are available, they don’t cover as much of the higher installation cost.

Suitability

  • Air Source Heat Pumps (ASHPs):
    ASHPs are good for small to medium-sized properties. They don’t need much space outside. They are ideal where land is limited.
  • Ground Source Heat Pumps (GSHPs):
    GSHPs suit larger properties with enough space for a ground loop system. They are better for people who want a stable and efficient heating solution over time.
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ASHPs and GSHPs both offer efficient heating solutions. ASHPs are easier and cheaper to install, making them better for smaller properties. GSHPs cost more but are more efficient and suited for larger spaces.

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