New international classification of air filters
according to EN ISO 16890

Class designation	Requirement			Specified value for the class
	ePM1, min	ePM2,5, min	ePM10
ISO COARSE	–	–	≥ 50 %	Initial gravimetric separability
ISO ePM10	–	–	≥ 50 %	ePM10
ISO ePM2,5	–	≥ 50 %	–	ePM2,5
ISO ePM1	≥ 50 %	–	–	ePM1

Classification of air filters
according to EN 1822:2010

EN 1822		Total value for MPPS particles (0.1 – 0.3 μm)		Integral value for MPPS particles (0.1 – 0.3 μm)
Filter group	Filtration class	Efficiency (%)	Penetration (%)	Efficiency (%)	Penetration (%)
Group E EPA	E 10	≥ 85	≤ 15	–	–
	E 11	≥ 95	≤ 5	–	–
	E 12	≥ 99,5	≤ 0,5	–	–
Group H HEPA	H 13	≥ 99,95	≤ 0,05	≥ 99,75	≤ 0,25
	H 14	≥ 99,995	≤ 0,005	≥ 99,975	≤ 0,025
Group U ULPA	U 15	≥ 99,9995	≤ 0,0005	≥ 99,9975	≤ 0,002 5
	U 16	≥ 99,999 95	≤ 0,000 05	≥ 99,999 75	≤ 0,000 25
	U 17	≥ 99,999 995	≤ 0,000 005	≥ 99,999 9	≤ 0,0001

Previous international classification of air filters
according to EN 779:2012 and EN 1822:2010

EN 779		Moderate separation efficiency (Am) of synthetic dust (%)	Filter efficiency (Em) for 0.4 μm particles (%)	Minimum efficiency (M.E. for 0.4 μm particles (%))
Filter group	Filtration class
Coarse dust	G1	50 < Am < 65	–	–
	G2	65 < Am < 80	–	–
	G3	80 < Am < 90	–	–
	G4	90 < Am	–	–
Semi-coarse dust	M5	–	40 < Еm < 60	–
	M6	–	60 < Em < 80	–
Fine dust	F7	–	80 < Em < 90	35
	F8	–	90 < Em < 95	55
	F9	–	95 < Em	70

 

EN 1822		Total value for MPPS particles (0.1–0.3 μm)		Integral value for MPPS particles (0.1–0.3 μm)
Filter group	Filter class	Efficiency (%)	Penetration (%)	Efficiency (%)	Penetration (%)
Group E EPA	E 10	≥ 85	≤ 15	–	–
	E 11	≥ 95	≤ 5	–	–
	E 12	≥ 99.5	≤ 0.5	–	–
Group H HEPA	H13	≥ 99.95	≤ 0.05	≥ 99.75	≤ 0.25
	H 14	≥ 99.995	≤ 0.005	≥ 99.975	≤ 0.025
Group U ULPA	U 15	≥ 99.999 5	≤ 0.000 5	≥ 99.997 5	≤ 0.002 5
	U 16	≥ 99.999 95	≤ 0.000 05	≥ 99.999 75	≤ 0.000 25
	U 17	≥ 99.999 995	≤ 0.000 005	≥ 99.999 9	≤ 0.0001