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Re:Air-to-Air Heat Exchangers for Healthier Energy-Efficient... by lnsru on Saturday February 04, 2023 @12:58PM (#34656473)
EPS will be plastered afterwards. I don’t see any problem having it between brick wall and plastered layer.

12 cm is ok for an old house. More is not economically viable.

Re:Air-to-Air Heat Exchangers for Healthier Energy-Efficient... by tinco on Saturday February 04, 2023 @06:41PM (#34659706)
I got used PIR panels for cheap for my renovation. There's companies who operate large barns filled with that stuff selling it online.