Content of the contribution
When measuring zero pressure for high-rises according to the ISO 9972 standard, it is normally not possible to meet its requirements where the absolute values Δp + and Δp- have to be kept at <5 Pa before and after the measurement. This presentation puts forward a proposal for a zero pressure measurement method that complements this standard and the guideline "Airtightness measurement of high-rise buildings" (see the presentation for BuildAir 2019 Peper / Schnieders).
The evaluation of numerous zero pressure measurements of high-rise buildings (source: Steffi Rolfsmeier and PHI) shows that the requirement to report positive / negative values and to cap the amount at 5 Pa can still be met if you refer to the deviation from the respective mean value instead of to absolute zero. I will present this evaluation and the procedure that complements applicable technical standards.
For further information please contact Søren Peper at: firstname.lastname@example.org