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Project specification

  • Property type: Country estate
  • Technologies installed:
  • Collector type:
  • Size (kW): 68
  • New/retrofit: Retrofit
  • Brand: CTC

Middleton Manor is a Grade II listed manor house located near the rolling hills of the South Downs. Previously a family home for the current owners, it has now been a high end rental property for a number of years. With one tenancy coming to an end the owners decided to explore the options of installing a ground source heat pump to minimise future running costs for the next tenants. With factors such as running costs becoming more important in property decisions for both potential tenants and purchasers alike, the availability of the Domestic RHI helped make the decision for the owners more cost effective. Having previously run on two ageing oil boilers consuming in the region of 15,000l – 20,000l of oil per year, the decision was made to install a suitably sized ground source heat pump system to provide for all the heating and hot water needs at a fraction of the costs of running the house on oil. The new system is saving the current tenants up to £4,000 per year on their heating and hot water costs. At the same time, the previously open-vented hot water system was converted to a pressurised system by the owners trusted plumbers, enabling the removal of the shower pumps from the old cylinders and resulting in better pressure at all of the taps from one centralised hot water cylinder.

isoenergy was asked to design a system that would respect the building and heat the section currently lived in my the owners. A number of options were available for providing heating, but the near by lake was a perfec heat source for a ground source heat pump.

The heat pump system consisted of two 34 kW ground source heat pumps collecting energy from an array of 10 boreholes, each 130 metres deep. A large buffer tank for the heating system means that the heat pump does not have to start so often as on each start it heats a larger quantity of water.


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