How much does it cost to boil a kettle for one cup?
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The average kettle holds 1.5 pints and uses about one unit of electricity to boil 12 pints of water (or 8 x 1.5 pint-full kettles) – so that's around 2.5p every time you boil a full kettle. The average slow cooker uses about one unit of electricity or 20p to power eight hours of cooking – that's roughly 2.5p per hour.
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