BS ISO 16000-8:2007

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principles of tracer gas measurements for determining
  of ventilation conditions
  4.1 General principles
  4.2 Selected tracer gas methods
5 Measurement planning
  5.1 General
  5.2 Identification of the ventilated system
  5.3 Identification of zones
  5.4 Choice of measurement method
  5.5 Determination of measurement points
6 Tracer gases and equipment for determining
  ventilation conditions
  6.1 Choice of tracer gas
  6.2 Tracer gas concentration standard
  6.3 Equipment for feeding the tracer gas
  6.4 Sampling the tracer gas
  6.5 Determination of tracer gas concentration
7 Measurement methods
  7.1 Decay method
  7.2 Active homogeneous emission method
  7.3 Passive homogeneous emission method
8 Application of results
9 Test report
Annex A (informative) Explanation of some terms and definitions
Annex B (informative) General requirements of tracer gases,
        background contents and methods of detection of
        the most important ones
Annex C (informative) Estimation of uncertainty of measured local
        mean ages of air
Annex D (informative) Examples of measurement procedure,
        calculation and estimation of uncertainty
Annex E (informative) Air quality relevance of local mean age
        of air and expression of results
Bibliography

Explains the use of single tracer gas for determining the local mean age of air as an indicator of ventilation conditions in a building.

This part of ISO16000 describes the use of single tracer gas for determining the local mean age of air as an indicator of ventilation conditions in a building. The procedures include concentration decay and homogeneous constant emission. The described methods are intended for air quality studies and can be used for checking whether the building ventilation requirements are met, estimating the adequacy of ventilation in buildings with indoor air quality problems, and characterizing the strength and distribution of indoor emission sources. In principle, the methods can be applied to all indoor spaces, regardless of the type of ventilation used and the state of mixing of air between zones. The prevailing ventilation conditions need not be disturbed by the measurement. This part of ISO16000 does not address the details of the analytical methods for tracer gases. The availability of such analysis services should be checked before planning actual field measurements.