Luftfilter für die allgemeine Belüftung
Die „International Organisation for Standardisation“ (ISO) hat die neue globale Norm ISO16890 geschaffen, die die Klassifizierungs- und Prüfverfahren der Luftfilter für allgemeine Lüftungssysteme definiert. Insbesondere bezieht sich die ISO16890 auf Elemente zur Luftfiltration unter Berücksichtigung von Partikeln zwischen 0,3 μm und 10 μm (siehe Tabelle).
Die neue Norm, die ab August 2018 endgültig in Kraft treten wird, ersetzt die europäische Gesetzgebung EN 779 und ASHRAE 52.2, die in den USA vorwiegend angewendet wird. Ziel ist es, eine einzige weltweite Norm zu schaffen, die in vier Klassen unterteilt ist, sich auf die Leistung des Filters gegenüber drei verschiedene Partikelfraktionen bezieht und einen gezielteren Prozentsatz für den Wirkungsgrades angibt.
Die Hauptunterschiede zwischen der Norm ISO 16890 und der aktuellen Norm beziehen sich hauptsächlich auf die strengeren Tests, was zu einem Anstieg der IAQ führen wird, und auf die Tatsache, dass die feineren Pulver, die unter die Klassifizierung PM1 fallen, auch die gefährlichsten für die menschliche Gesundheit sind. Filter mit hohem Wirkungsgrad zur Rückhaltung tragen daher dazu bei, die Qualität der Atemluft zu verbessern.
Group | Class | Reference Value | Final ΔP (Pa) | ||
---|---|---|---|---|---|
ePM1 min | ePM2,5 min | ePM10 | |||
0,3 ≤ x ≤ 1 | 0,3 ≤ x ≤ 2,5 | 0,3 ≤ x ≤ 10 | |||
ISO Coarse | – | – | < 50% | Initial gravimetric arrestance | 200 |
ISO ePM10 | – | – | ≥ 50% | ePM10 | 300 |
ISO ePM2,5 | – | ≥ 50% | – | ePM2,5 | 300 |
ISO ePM1 | ≥ 50% | – | – | ePM1 | 300 |
Comparison EN779 – ISO16890
EN779:2012 | ISO16890 |
---|---|
Compressed air capacity between 0,24 m3/s (850 m3/h) and 1,5 m3/s (5400 m3/h) | Compressed air capacity between 0,25 m3/s (900 m3/h) and 1,5 m3/s (5400 m3/h) |
F9, F8, F7, M6, M5, G4, G3, G2, G1 | ePM1, ePM2,5, ePM10, ISO Coarse are the maximum particle concentrations |
Dp = 0,4 μm | 0,3 μm ≤ Dp ≤ 10 μm |
The minimum efficiency (ME) defines the filtering classes between F7-F9 | The average efficiency (EA) is the average between the initial efficiency (Ei) and the discharged efficiency (Ed) |
Ed from average samples (F7-F9) on liquid isopropanol | Ed from complete filter with isopropanol vapours |
The dust built-up is calculated up to a final pressure of 450 Pa | PM10 < 50% – Δpfinal = 200 Pa PM10 ≥ 50% – Δpfinal = 300 Pa |
Dust: ASHRAE | Dust: ISO A2/Fine AC |
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