American efficiency standards

The norms that ASHRAE 52.2P-1996 suggests

Norms

Plan serious way, %

Arrestance

Counting method, % , particle Efficiency

0.3 ～ 1.0mm

1 ～ 3.0mm

3.0 ～ 10mm

C-1

C-2

C-3

C-4

E<65

65 ≤ E<70

70 ≤ E<75

75 ≤ E<80

L-5

L-6

L-7

L-8

(80 ～ 85)

(85 ～ 90)

(> 90)

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