Air source and ground source heat pumps

Renewable heating technology that could save money and reduce carbon emissions

 

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What are air source (ASHP) and ground source heat pumps (GSHP)?

Heat pumps are a proven, renewable heating technology. An air source heat pump extracts heat from the air and boosts it to a higher temperature. A ground source heat pump draws heat energy from ground. They're used to power heating and hot water. For businesses that need a lot of heating, they are a good alternative to electric, coal or gas heating.

Whether you choose an air source or a ground source heat pump depends on what space you have available. Air source heat pumps can be easier to install than ground source because they don't need any trenches or drilling.

Why install heat pumps in your business?

We specialise in designing and installing heat pump systems, which could save your business money and help reduce your carbon emissions.

  • Easy to install, minimising disruption in your business and suitable for retrofit or new build
  • Highly efficient, cutting running costs and C02 emissions
  • Could qualify for payments under the Non-Domestic Renewable Heat Incentive [1]

Air source heat pump (ASHP)

Air source heat pump

The unit is fitted to an outside wall, where it sucks in heat from the air and passes it into a liquid. This liquid is then compressed, which increases the heat.

There are two sorts of air source heat pumps:

Air to water pumps – these pass the captured heat into underfloor heating or radiators to provide warmth, or to heat up hot water

Air to air pumps – these circulate warm air through vents as a form of heating. They can’t be used to provide hot water

Other things to consider:

  • You'll need outside space to fit the unit, with clearance all round it.
  • A south facing wall is best, because it will stay warmer.
  • There will be some work involved to fit the pump, as it needs to be connected to your heating system through the wall on which it’s fitted.
  • You'll get the most benefit if your building is well insulated.

Ground source heat pumps

These work like an air source heat pump, but they draw heat from the ground into underground pipes. The pipes are usually filled with either anti-freeze or a more environmentally-friendly alternative. From there, the heat is passed into a heat exchanger. There will usually be around 100m of pipework, which can either be laid in loops or vertically. The pipes are buried at a depth that means that the surface area can be restored to its original use.

Other things to consider:

  • You may need planning permission
  • The amount of pipework you'll need and the ground space you have available
  • You'll need access to dig the ground and lay the pipes
Ground source heat pumps

The Non-Domestic Renewable Heat Incentive (RHI)

By 2020, 15% of all energy generated in the UK should be from renewable sources. To meet this target, the UK Government has introduced the Renewable Heat Incentive (RHI). If eligible, the Non-Domestic RHI offers subsidies, payable for 20 years, for the renewable heat that your business system produces [1]

* Call charges may apply.

[1] Eligibility, registration and claiming Non-Domestic RHI are the sole responsibility of the customer.