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National Standards for Air Filtration Grade Division

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National Standards for Air Filtration Grade Division

                                        United States Efficiency Specification
SpecificationParticle Efficiency(%)Arrestance(%)TEST
ArrestanceThe End Resistance(Pa)

Final Resist
0.3~1.0μm1.0~3.0μm3.0~10.0μm

MERV1

E3<20Aavg<6575E1 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
MERV2E3<2065≤Aavg<7075
MERV3E3<2070≤Aavg<7575
MERV4E3<2070≤Aavg75
MERV5

20≤E3<35
150
MERV635≤E3<50150
MERV750≤E3<70150
MERV870≤E3<80150
MERV9
E2<5085≤E3
250
MERV1050≤E2<6585≤E3250
MERV1165≤E2<8085≤E3250
MERV1280≤E2<9090≤E3250
MERV13E1<7590≤E290≤E3
350
MERV1475≤E1<7590≤E290≤E3350
MERV1585≤E1<9590≤E290≤E3350
MERV1695≤E195≤E295≤E3350
MERV17≥99.97% IEST-Class A
MERV18For 0.3 μm Particle        ≥99.99% IEST-Class C HEPA Filter
MERV19≥99.999% IEST-Class D
MERV20For 0.1~0.2μm Particle, Scanning Method≥99.999% IEST-Class F UEPA Filter


 
                                                      Current Classification in Europe
StandardEN779:1993EN1882-1:1998
SpecificationProportion Method(%)Colorimetric or Counting Methods(%)Most Permeable Particle Size Method(%)
ArrestanceDust-spotMPPS

Or Particle Efficiency
G1E<65

G265≤E<80
G380≤E<90
G490≤E
F5
40≤E<60
F660≤E<80
F780≤E<90
F890≤E<95
F995≤E
H10

85≤E<95
H1195≤E<99.5
H1299.5≤E<99.95
H1399.95≤E<99.995
H1499.995≤E<99.9995
U15

99.9995≤E<99.99995
U1699.99995≤E<99.999995
U1799.999995≤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( %)<4040<E<8040<E<8070<E<9995<E<99.9
GB/T14295-93 Classification
Coarse EffectIntermediate-actingHigh EfficiencySub HEPA
Particle Size (μm)
≥5.0≥1.0≥0.5
Counting Efficiency(%)
20<E<8020<E<7070<E<9995<E<99.9


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