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Are Passive Houses cost-effective?

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are evenly plastered, the roof structures contain airtight membranes, which are plastered up in the knee wall area. Based on existing experience, **airtightness corresponding to n₅₀=0.4 h<su... is – in fact, costs are reduced because increased airtightness prevents building damage, the repair of ... ve than the one-off investment in a high quality, airtight external envelope; besides that, there is th