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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 Qwertious on Wednesday December 28, 2022 @12:43PM (#34163546)
Heat pumps are also known as "reverse cycle air-conditioners".
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Re:US companies are producing heat pumps that work below -20... by downvotetruth on Wednesday December 28, 2022 @03:12PM (#34165328)
outside source(d) heater
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