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A comment on US companies are producing heat pumps that work below -20F(-28C). Parent comment

Re:US companies are producing heat pumps that work below -20... by a_square_peg on Wednesday December 28, 2022 @12:29PM (#34163365)
Interesting thing here is that natural gas is about 1/3 the cost of electricity per energy unit, so when the COP is above 3, it's cheaper to heat home using heat pump.

The reason why natural gas is about 1/3 of the cost of electriciy is because most natural gas power plants run at thermal efficiency of about 30%.

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Re:US companies are producing heat pumps that work below -20... by pfdietz on Wednesday December 28, 2022 @01:50PM (#34164294)
Combined cycle natural gas plants have an efficiency of about 60% (lower heating value). Even simple cycle NG plants are about 40% efficient (again LHV).
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