A new ISO standard is about to replace the current EN 779 standard used to characterize the filtration efficiency of filters now classified from G1 to F9. This new standard incorporates a different approach from the current standard in terms of classification methodology and will therefore have a significant impact on the market. It is proposed here to present the main changes, to detail the future benefits provided by this standard and to consider the impact on the certification of the filters.
New ISO 16890 - A new way to classify filters
Over the past five years, a new approach has been developed within the ISO standardization working groups to characterize filter filtration efficiency. This new approach is to look at filtration efficiency not only for particles with a diameter of 0.4 µm but to consider the entire spectrum of particle sizes. The EN779:2012 standard used today in Europe to characterize the filtration efficiency of the filters for the ventilation of buildings defines the filtration classes according to the average filtration efficiency of the particles with a diameter of 0.4 µm