• New self-build: Bishop’s Caundle, Dorset
• Floor area: 108 m₂
• Heating & hot water: Air Source Heat Pump 6 kW
• Emitters: Radiators
• RHI payment: £2,190.79 over 7 years

This four bedroom detached new build is highly insulated and energy efficient with a heat loss of only 2.2 kW. An Air Source Heat Pump is ideal for such a low heating demand and it provides lots of hot water too.
The Air Source Heat Pump enabled the owner to meet the stringent SAP 2012 Building Regulations for the property.
The running costs for all heating & hot water and will be under £500 per year. The owner will receive a total of £2,190.79 over the next 7 years from the government’s Domestic Renewable Heat Incentive (RHI).

• Renovation: Sherborne, Dorset
• Floor area: 272m₂
• Heating & hot water: Ground Source Heat Pump 14 kW
• Emitters: Underfloor heating in extension and radiators elsewhere
• RHI payment: £33,747 over 7 years

This detached Edwardian property has 16th century parts . It was a complete renovation project with loft conversion, new kitchen extension and three new bathrooms, to make a 5 bedroom home. The existing cavity walls were injected with insulation and the existing loft spaces were insulated up to 300mm thick.

The owners are environmentally conscious and wanted to reduce their CO₂ emissions. They wanted a heating system that would give them a cosy house throughout the year and plenty of hot water for all the family.
We replaced the old oil fired Rayburn with a 14 kW Ground Source Heat Pump. The owners couldn’t believe that the house was so hot and they had to turn the heating down! They also have plenty of hot water for the 3 new bathrooms. A 50m pipe under the lawn leads to the ground array in a nearby field.
The owners will receive a total of £33,747 over then next 7 years from the government from the Domestic Renewable Heat Incentive (RHI). The heat pump is also much cheaper to run than the old oil boiler and they no longer dread the next oil price rise.

• Retrofit: Washford, Somerset
• Floor area: 366 m₂
• Heating & hot water: Ground Source Heat Pump 24 kW + Photovoltaic panels
• Emitters: Radiators
• RHI payment: £46,760 over 7 years

This large six bedroom period detached farmhouse is constructed of solid stone walls with a conventional slate roof. Some of the windows are double glazed but most are single glazed wooden ones. The roof void was insulated up to 300mm thick.
The owners wanted to replace their old oil-guzzling boiler and have a warm house. They considered the new renewable energy Heat Pump a good investment with the RHI payments! The oil boiler was replaced by a 24 kW Ground Source Heat Pump that provides heating and hot water. A 70m pipe buried underground leads to the ground array in an adjacent field.
A Solar PV array was also installed to help offset some of the electric demand within the property including that from the ground source heat pump. The owners will receive an amazing total of £46,760 over the next 7 years from the government’s Domestic Renewable Heat Incentive (RHI).
In addition the carbon footprint of their Ground Source Heat Pump is less than half the size of the oil boiler. As well as being cheaper to run there will be no more running out of oil when they have forgotten to re-order it!