EN ISO 12569:2017

European foreword
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement method and its selection
5 Procedure
6 Accuracy
7 Test report
Annex A (normative) - Confidence intervals
Annex B (normative) - Method to estimate ventilation
        rate Q[v] and effective mixed zone volume
        V[emz] simultaneously
Annex C (informative) - Considerations when measuring
        the ventilation rate of large spaces
Annex D (informative) - Effects of internal and external
        temperature difference, temperature change,
        and outdoor air concentration change during the
        measurement period
Annex E (informative) - Estimation error minimizing method
        in two-point and multi-point decay methods
Annex F (informative) - Propagation of error analysis
Bibliography

ISO 12569:2017 establishes methods to obtain the ventilation rate or specific airflow rate in a building space (which is considered to be a single zone) using a tracer gas.The measurement methods apply for spaces where the combined conditions concerning the uniformity of tracer gas concentration, measurement of the exhaust gas concentration, effective mixed zone and/or fluctuation of ventilation are satisfied.ISO 12569:2017 provides three measurement methods using a tracer gas: concentration decay method, continuous dose method, and constant concentration method.NOTE Specific measurement conditions are given in Table 1.