EN ISO 9972:2015

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, and symbols
4 Apparatus
5 Measurement procedure
6 Expression of results
7 Test report
8 Uncertainty
Annex A (informative) - Description of equipment used
        to pressurize buildings
Annex B (informative) - Dependence of air density on
        temperature, dew point, and barometric pressure
Annex C (informative) - Recommended procedure for
        estimating uncertainty in derived quantities
Annex D (informative) - Beaufort scale of wind (extract)
Annex E (informative) - Detection of the leakage location

ISO 9972:2015 is intended for the measurement of the air permeability of buildings or parts of buildings in the field. It specifies the use of mechanical pressurization or depressurization of a building or part of a building. It describes the measurement of the resulting air flow rates over a range of indoor-outdoor static pressure differences.ISO 9972:2015 is intended for the measurement of the air leakage of building envelopes of single-zone buildings. For the purpose of this International Standard, many multi-zone buildings can be treated as single-zone buildings by opening interior doors or by inducing equal pressures in adjacent zones.ISO 9972:2015 does not address evaluation of air permeability of individual components.