4. Heat up Your Home

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The Nest Learning Thermostat turns the heating down when no-one’s home and is largely automated, saving you money by helping your heating costs go down. It learns what temperatures you like, and programs itself. But if you want to take control, the app will help you. You can even turn the heating on before you get home so your house is toasty when you walk through the door. Available here

A Doorbell That Has Eyes
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