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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 mrinterweb on Wednesday December 28, 2022 @02:35PM (#34164906)
My heat pump is advertised to operate as low as -13F. One thing to note is the efficiency of heat pumps is not optimal when they are operating close to their extremes.
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