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A comment on Air-to-Air Heat Exchangers for Healthier Energy-Efficient Homes. Parent comment

Re:Air-to-Air Heat Exchangers for Healthier Energy-Efficient... by lnsru on Saturday February 04, 2023 @01:04PM (#34656520)
270 mm for roof or walls? For roof yes, for walls I don’t know. I have no plan to create passive home from an old one.
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