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- Airtightness measurements in Passive Houses
- s ==== The air volume V<sub>n50</sub> within the heated building envelope is the volume that will be us... ndicate the //actual// volume of air that will be heated or cooled within the building and should be cal... ings__ should be operated continuously during the heating period for reasons of hygiene. Because a balan... ds to prevent the building from losing additional heat due to thermal lift and strong winds while the ve