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Efficient Hot-Water Piping (2013) [pdf] (garykleinassociates.com) 3 points by throw0101d 5 months ago | past | 2 comments Efficient Hot-Water Piping (2013) [pdf] (garykleinassociates.com) 119 points by rudedogg on March 7, 2018 | past | 56 comments

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