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Warkwickshire Farmhouse Green Solution Lowers Energy Bills By 50%

04 August 2012Air Source Heat PumpSolar Photovoltaic

Mr A lives in an old farmhouse in Warwickshire and already had a 10KWp solar PV installation from Bright Green Renewables. Due to the poor performance of his existing central heating system Bright Green proposed the installation of a 16KW Daikin monoblock Air Source Heat Pump to provide central heating and hot water. This would also help ensure that he benefited from the free electricity generated by his solar PV array.

The Solution

Bright Green Renewables surveyed the property and conducted an in-depth heat loss analysis to help specify the heat pump along with the efficiency of the existing distribution system (a combination of Under Floor Heating and Radiators). Bright Green also proposed converting the hot water system to an unvented mains pressure system to improve the performance of the showers and general hot water flow rates. The heat pump was located out-of-sight at the side of the property near to the location of the existing boiler and has been programmed to run in weather-compensation mode to maximise operating efficiencies and minimise running costs.

A new 300L unvented stainless steel hot water cylinder was installed in the position of the old boiler and the existing un-insulated cylinder was decommissioned and left in the roof space.

The Installation

In early March 2012 the heat pump, cylinder and installation accessories were delivered to site. The Bright Green plumbing and electrical teams removed the old system and had the new system operational and commissioned in 2 days. This included the installation of a new hot water ring main around the farmhouse to improve hot water delivery times to the taps.

The Benefits

Mr A has already reported significantly improved hot water flow rates and capacity and reports that the house has remained warm and comfortable during the recent cold spell. A quick analysis of electricity consumption has identified that he is saving around 50% compared to his old heating bills. This will be closely monitored next winter.

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