Cambridge Architectural Research (CAR) was commissioned by The Department for Energy and Climate Change (DECC) to estimate the potential energy savings that could be achieved by households adopting everyday ‘behaviours’. Some of the 45 behaviours examined describe a change in the way people use energy in their homes (e.g. ‘turn the thermostat down’), while others describe a technical upgrade (e.g. ‘insulate hot water tank’), and a small number describe both a technical upgrade and a change in behaviour (e.g. ‘install water efficient shower head and use twice every day’).