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Pie charts showing how to make a low carbon home. The charts show incrementally reducing segments as more action is taken to reduce emissions.

Average home (represented as a red circle): Poorly insulated and draughty home. 10+ years old gas boiler with boor controls, No controlled ventilation. No renewable energy generation.

In order to halve the demand (represented as a pie chart with half being a larger yellow segment): Remove all draughts. Improve air tightness. Insulation added to loft. Windows upgraded to more thermally efficient units. Wall and floor insulation added.

In order to double the efficiency (represented as a pie chart with a quarter being a larger light green segment): New control strategy for heating, heat rooms as needed. Add mechanical ventilation. Insulate heating pipework. Use more efficient appliances in the home.

In order to use renewable energy (represented as a pie chart with an eighth being a larger dark green segment): Buy energy from a green supplier. Install a heat pump. Add solar panels. Use energy when the grid is lower carbon.