National Standards for Air Filtration Grade Division

Publish Time: 2021-12-18 Origin: Site

National Standards for Air Filtration Grade Division

United States Efficiency Specification
Specification	Particle Efficiency(%)			Arrestance(%)	TEST
				Arrestance	The End Resistance(Pa)
					Final Resist
	0.3～1.0μm	1.0～3.0μm	3.0～10.0μm
MERV1			E3<20	Aavg＜65	75	E1 is 0.30-0.40,0.40-0.55,0.55-0.70,0.70-1.0μm four particle size interval of the whole process of the test the lowest average; E2 is 1.0 to 1.3, 1.3-1.6, 1.6-2.2, 2.2 to 3.0 mu m four the minimum average particle size range; E3 is 4.0 to 4.0, 4.0-5.5, 5.5-7.0, 7.0 to 10.0 mu m four lowest average particle size range
MERV2			E3<20	65≤Aavg＜70	75
MERV3			E3<20	70≤Aavg＜75	75
MERV4			E3<20	70≤Aavg	75
MERV5			20≤E3＜35		150
MERV6			35≤E3＜50		150
MERV7			50≤E3＜70		150
MERV8			70≤E3＜80		150
MERV9		E2＜50	85≤E3		250
MERV10		50≤E2＜65	85≤E3		250
MERV11		65≤E2＜80	85≤E3		250
MERV12		80≤E2＜90	90≤E3		250
MERV13	E1＜75	90≤E2	90≤E3		350
MERV14	75≤E1＜75	90≤E2	90≤E3		350
MERV15	85≤E1＜95	90≤E2	90≤E3		350
MERV16	95≤E1	95≤E2	95≤E3		350
MERV17	≥99.97% IEST-Class A
MERV18	For 0.3 μm Particle ≥99.99% IEST-Class C HEPA Filter
MERV19	≥99.999% IEST-Class D
MERV20	For 0.1~0.2μm Particle, Scanning Method≥99.999% IEST-Class F UEPA Filter

Current Classification in Europe
Standard	EN779:1993		EN1882-1:1998
Specification	Proportion Method(%)	Colorimetric or Counting Methods(%)	Most Permeable Particle Size Method(%)
	Arrestance	Dust-spot	MPPS
		Or Particle Efficiency
G1	E<65
G2	65≤E<80
G3	80≤E<90
G4	90≤E
F5		40≤E<60
F6		60≤E<80
F7		80≤E<90
F8		90≤E<95
F9		95≤E
H10			85≤E＜95
H11			95≤E＜99.5
H12			99.5≤E＜99.95
H13			99.95≤E＜99.995
H14			99.995≤E＜99.9995
U15			99.9995≤E＜99.99995
U16			99.99995≤E＜99.999995
U17			99.999995≤E

Classification of air filtration (GB)
GB12218-89 Classification	I	Ⅱ	Ⅲ	Ⅳ	Ⅴ
Partical Size（μm)	≥5.0		≥1.0		≥0.5
Counting Efficiency( %）	<40	40<E<80	40<E<80	70<E<99	95<E<99.9
GB/T14295-93 Classification		Coarse Effect	Intermediate-acting	High Efficiency	Sub HEPA
Particle Size (μm)		≥5.0	≥1.0		≥0.5
Counting Efficiency(%)		20<E<80	20<E<70	70<E<99	95<E<99.9

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