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Re:US companies are producing heat pumps that work below -20... by a9h74j on Wednesday December 28, 2022 @12:33PM (#34163428)
There is a YT video with Matt Risinger discussing/promoting "Thermafloor"(IIRC) which uses 25mil aluminum over the full surface of the flooring panels. They discuss some of the benefits of lower water temperature, but not all of the variables.

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