Device automatically saves energy from learning how people use their heating at home
Nest, the US technology company bought by Google in January for $3.2bn (£2bn), is launching its hi-tech version of the humble thermostat in the UK.
The device, which the company says learns how people use their heating at home and automatically saves energy for them, follows its launch in the UK of a smoke alarm last autumn that can distinguish burnt toast from a real fire, and detect carbon monoxide.