Heat pumps
What is a heat pump?
A heat pump is a fridge running backwards. Instead of moving heat out of a small box, it moves heat into your home from the air or ground outside. It uses electricity to do the work, but for every 1 kWh of electricity it uses, it delivers 3–4 kWh of heat — which is why it can heat your home for less than a gas boiler does, even with electricity costing more per kWh than gas.
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