Air filters used in general ventilation - Eurovent 2004 round-robin test on the basis of EN 779 annex A and long term test in real life

Résumé et principaux résultats

The main objective of this round robin test (decided by Eurovent Working Group 4b) is to assess EN 779 (2002) Annex A test procedure : do all participating labs obtain the same results ' Do the different methods (isopropanol treatment, diesel fume loading, surfactant treatment, natural loading ; filter medium or full size filter) give the same results ' Do laboratory test results well represent the real behaviour of the filters '
Two different kinds of F7 bag filters (one made with electrostatically charged synthetic medium and one made with glass fiber medium) have been tested according to EN 779 (2002) Annex A test procedure, according to EN 779 loading procedure and have been studied under real life conditions (natural loading).
It can be concluded that with isopropanol used with medium sample or diesel fume used with full size filter, there is a good agreement between laboratories with a very slight increase of pressure drop ; the results (EN 779 Annex A) indicate the minimum efficiency observed in real life in worst outdoor air condition. According to EN 779 laboratory test results, the classification is misleading for real life outdoor air applications and the ASHRAE dust holding capacity is not representative of real life performances.

Commissions

Filtration de l'air

Thème

Ventilation et qualité de l'air

Mots-clés

Essais comparatifs, Filtration, Filtres, Filtres de ventilation générale

Auteurs

GINESTET Alain, PUGNET Dominique