BS ISO BRITISH STANDARD 16000-8:2007 Indoor air Part 8: Determination of local mean ages of air in buildings for characterizing ventilation conditions BSI Licensed copy: The University of Hong Kong, ICS 13.040.20 BSi British Standards 01:45, BS ISO 16000-8:2007 s of 03/04/2009 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 16000-8:2007. The UK participation in its preparation was entrusted by Technical Committee EH/2, Air quality, to Subcommittee EH/2/3, Ambient atmospheres. A list of organizations represented on this committee can be obtained on Version correct as request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. y Kong, / of Hong University B The y of Hong Kong, University This British Standard was Amendments issued since publication published under the authority of the Standards Policy and Strategy Committee Amd. No. Date Comments on31July2007 The C BSI 2007 I copy: Licensed ISBN 978 0 580 54791 1 BS IS0 16000-8:2007 INTERNATIONAL ISO STANDARD 16000-8 First edition 2007-06-15 Indoor air - / of Hong Kong, Part 8: Determination of local mean ages of air in buildings for characterizing ventilation conditions University BSI Air intérieur Partie 8: Détermination des ages moyens locaux de I'air dans des batimentspourcaracteriserlesconditionsdeventilation The of Hong Kong, Reference number ISO 16000-8:2007(E) , The University of Hong Kong, Version correct as of 03/04/2009 01:45, BSI BS IS0 16000-8:2007 Contents Page of as Foreword Introductior Version correct 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.. Kong, 5.1 5.2 Identification of the ventilated system 5.3 Identification of zones .. 5.4 Choiceofmeasurementmethod 5.5 Determination of measurement points.. 6 Tracer gases and equipment for determining ventilation conditions .. 6.1 Choice of tracer gas .. of 6.2 Tracer gas concentration standard.. 6.3 Equipment for feeding the tracer gas S 6.4 Sampling the tracer gas . B Universi 6.5 Determination of tracer gas concentration 7 Measurement methods... 7.1 Decay method 8 7.2 Active homogeneous emission method..... 10 7.3 The Passive homogeneous emission method. 11 8 Application of results . 12 9 Test report . Kong, 12 AnnexA(informative)Explanationofsometermsanddefinitions Annex B (informative) General requirements of tracer gases, background contents and methods of detection of the most important ones.... .14 Annex C (informative) Estimation of uncertainty of measured local mean ages of air.... .17 Annex D (informative) Examples of measurement procedure, calculation and estimation of uncertainty..... .20 Annex E (informative) Air quality relevance of local mean age of air and expression of results : 37 Bibliography.... 41 copy: censed ii 03/04/200901:45. BS ISO 16000-8:2007 Foreword 01 (isO member bodies). The work of preparing International Standards is normally carried out through IsO technical committees. Each member body interested in a subject for which a technical committee has been InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 Versi adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote Attention is drawn to the possibility that some of the elements of this document may be the subject of patent Hong Iso 16000 consists of the following parts, under the general title Indoor air : of Part 1: General aspects of sampling str