Attic insulation: 300mm of mineral wool insulation. Insulation of all tanks and pipes. Roof ventilation
Cavity wall insulation: The walls of the main house had an empty 100mm cavity. The walls of the extension built in the 90's had a 100mm cavity with 50mm of existing rigid board insulation. All walls were fully pumped with cavity bead insulation.
Air to water heat pump: The existing oil boiler was decommissioned and removed. The house had a combination of radiators and storage heaters. An 8.5kW air to water heat pump was installed in it's place. 80% of the existing radiators were retained as they were in good condition and the complied with the heat loss indicator requirements. 20% of the radiators were replaced with suitably sized radiators. All storage heaters were removed and replaced with new suitably sized radiators and new flow and return pipework. The indoor heat pump contained an integrated pre-plumbed 200L cylinder which provides a constant supply of hot water. The existing heating system was power flushed and a magnetic filter was installed. The existing electric shower was also removed and replaced with a gravity power shower to take advantage of the supply of hot water generated by the air to water heat pump.
Solid fuel insert stove: The existing fireplace was removed and replaced with a new fireplace, mantle and hearth which complied with current building regulations. The chimney was cleaned and lined and a new Ecodirective compliant insert solid fuel stove was installed. A chimney cowl and two CO detectors were also installed.
LED bulbs: All internal light bulbs were upgraded to LED.
Windows and doors: The front door was replaced with a composite door. All existing windows were replaced with triple glazed UPVC windows.
Heat recovery: A whole house mechanical heat recovery system was installed to ventilate the house.
Solar PV: A 4 kWp solar PV system was installed in conjunction with a 4.5 kW back up battery.