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Ground Source Heat Pumps

Air Source Heat Pumps

 

Ground Source Heat Pumps:

  • Can produce 4 or 5 KW of useful heat from 1 KW of electricity
  • Suited best to low temperature delivery systems, i.e. under floor heating
  • Can extract heat from the ground by using any of the following: horizontal ground collector, vertical slinky, ground probes, borehole pump or a collector loop in a lake.
  • Needs no chimney and therefore can be placed anywhere within a building, or externally within an outbuilding
  • Typical life expectancy of heat pumps is 20 years and most require little to no maintenance

A consultation is underway for a new scheme, entitled the Renewable Heat Incentive scheme. For more details click here. It is currently proposed that the incentive will be worth 7p/kWh.

Cost

From £11,000

Grant

£1,200

Return on Investment

On economy 7 ground source heat pumps cost approx 1.25p/KWh as opposed to oil fired heating that typically costs 5.5p/KWh (assuming oil cost of 40p/ltr and a boiler efficiency of 75%.)

 

Ground Collector Manifold

Laying Pipe in a Trench

Lake Collector ready for installation

Installing the Pipe for Lake Collector

Alternative lake collector

 

 

 

Air Source Heat Pumps:

  • Can produce 3KW of useful heat for every KW of electricity
  • Extract heat from the outside air
  • Least efficient when the outside air temperature drops.
  • Can be located internally and ducted to outside walls, or externally in the garden.
  • Heat can be transferred to the house by a wet heating system or directly to the air.

 It is currently proposed that the incentive under the new RHI scheme would be worth 7.5p/kWh.

Cost

From £8,000

Grant

£900

Return on Investment

On economy 7 an air source heat pump costs approx 1.75p/KWh as opposed to oil that costs 5.5p/KWh assuming oil cost of 40p/ltr and a boiler efficiency of 75%.

 

 

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