Filtration Classification

Classification of Absolute Air Filters
Type	EN1822	NBR ISO 29463-1 2013	Global Efficiency	Local Efficiency
Type	CLASS	CLASS	MPPS	MPPS
HEPA	E-10	-	≥ 85%
	E-11	ISO 15 E	≥ 95%
	-	ISO 20 E	≥ 99%
	E-12	ISO 25 E	≥ 99,5%
	-	ISO 30 E	≥ 99,9%
	E-13	ISO 35 H	≥ 99,95%	≥ 99,75%
	-	ISO 40 H	≥ 99,99%	≥ 99,95%
	E-14	ISO 45 H	≥ 99,995%	≥ 99,975%
ULPA	-	ISO 50 U	≥ 99,999%	≥ 99,995%
	U - 15	ISO 55 U	≥ 99,999 5%	≥ 99,997 5%
	-	ISO 60 U	≥ 99,999 9%	≥ 99,999 5%
	U - 16	ISO 65 U	≥ 99,999 95%	≥ 99,999 75%
	-	ISO 70 U	≥ 99,999 99%	≥ 99,999 9%
	U - 17	ISO 75 U	≥ 99,999 995%	≥ 99,999 9%

Classification of Thick, Medium and Fine Air Filters
NBR 16401-3:2008		NBR 16101:2012						ANSI / ASHRAE 52.2
NBR 16401-3:2008		NBR 16101:2012						Class	Average efficiency as a function of particulate range
Group	Class	Group	Class	Final pressure loss	Average arrestance (Am)	Average efficiency (Em) for 0.4 μm particulates	Minimum particle efficiency of 0.4 μm	MERV	E1	E2	E3
Group	Class	Group	Class	(Pa)	(%)	(%)	(%)	MERV	0,3 ~ 1,0 μ	1,0 ~ 3,0 μ	3,0 ~ 10,0 μ
THICK	G1	THICK	G1	250	50 ≤ Eg < 65	-	-	1			< 20 %
	G2		G2	250	65 ≤ Eg < 80	-	-	2			< 20 %
								3			< 20 %
								4			< 20 %
	G3		G3	250	80 ≤ Eg < 90	-	-	5			20 ~ 35 %
	G3		G3	250	80 ≤ Eg < 90	-	-	6			35 ~ 50 %
	G4		G4	250	90 ≤ Eg	-	-	7			50 ~ 70 %
								8			> 70 %
								9		< 50 %	> 85 %
FINE	F5	AVERAGE	M5	450	-	40 ≤ Ef < 80	-	10		50 ~ 65 %	> 85 %
	F6		M6	450	-	60 ≤ Ef < 80	-	11		65 ~ 80 %	> 85 %
	F6		M6	450	-	60 ≤ Ef < 80	-	12		> 80 %	> 90 %
	F7	FINE	F7	450	-	80 ≤ Ef < 90	35	13	< 75 %	> 90 %	> 90 %
	F8		F8	450	-	90 ≤ Ef < 95	55	14	75 ~ 85 %	> 90 %	> 90 %
	F9		F9	450	-	95 ≤ Ef	70	15	85 ~ 95 %	> 90 %	> 90 %