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Renewable Heat Incentive

Savings with Ground Source Heat Pumps

How much you can save will depend on what system you use now, as well as what you are replacing it with. Your savings will be affected by:

  • Your heat distribution system. Underfloor heating can be more efficient than radiators because the water doesn't need to be so hot. If underfloor heating isn't possible, use the largest radiators you can.
  • Your fuel costs. You will still have to pay fuel bills with a heat pump because they are powered by electricity, but you will save on the fuel you are replacing.
  • Your old heating system. If your old heating system was inefficient, you are more likely to see lower running costs with a new heat pump.
  • Water heating. If the heat pump is providing hot water then this could limit the overall efficiency. You might want to consider solar water heating to provide hot water in the summer and help maintain your heat pump efficiency.

These are the savings you should achieve when replacing a conventional heating system with a ground source heat pump:

Existing SystemFuel Bill Savings
(£/year)
RHI Payment
(£/year)
1st April 2015 - 31st March 2016
RHI Payment
(£/year)
1st March 2016 - 30th June 2016
Carbon Dioxide Savings
(kg CO2/year)
Gas older (non-condensing) £400 to £660 £2,555 to £3,955 £2,590 to £4,005 2,100 to 3,300 kg
Electric (old storage heaters) £790 to £1,425 6,700 to 11,700 kg
Oil older (non-condensing) £130 to £220 3,000 to 4,700 kg
LPG older (non-condensing) £960 to £1,500 2,800 to 4,500 kg
Coal £590 to £990 7,600 to 12,100 kg

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