Study Finds Heat Pumps More Efficient Than Gas and Oil Heating, Even in Cold Climates
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New Oxford study found air source heat pumps are more efficient than oil and gas heating, even in subzero temps.
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Heat pumps have a COP of 3-6, meaning they produce 3-6 units of heat per unit of electricity.
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In mild climates (-10C to 5C), heat pumps had a mean COP of 2.74, superior to fossil fuels.
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Specially engineered "cold climate" heat pumps can operate efficiently down to -10C before needing backup heating.
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Having a heat pump can reduce household emissions and costs compared to gas or oil heating.