Paper 10
The Real Life Efficiency of Gas Phase Filters
Used in General Ventilation and their Influence on the Indoor Air Quality
of an
Office
Building
Alain
Ginestet and Dominique Pugnet
CETIAT,
Centre Technique des Industries Aérauliques et Thermiques, Domaine
Scientifique de la Doua,
25 avenue des Arts, BP 2042, 69603 Villeurbanne Cedex, France
Abstract
Gas phase filters were
installed within the air handling unit of a HVAC system feeding 100 %
fresh (outdoor) air to an office building. The filter efficiency for ozone
(O3) and nitrogen oxides (NO2 and NO) was measured
continuously over a one year period as a function of time (filter's life)
and outdoor air parameters (temperature and relative humidity). The
results show that the filter efficiency varies with time and depends on
the temperature and relative humidity of air. It was also shown that the
use of this kind of filter improves the indoor air quality as the indoor /
outdoor concentration ratio is lower with the use of the gas phase filters
than without.
Key words: gas phase
filters, filtration, real life efficiency, ozone, nitrogen oxides, indoor
air quality.
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