Air Filter Class (EN779/AS1324/ ASHRAE 52.1)

Efficiency (AS1324 test dust #1)

Arrestance (AS1324 test dust #4)

Typical Contaminants

Typical Applications

Typical air filters

G1

-

<65%

Larger particles (>10 µm) Eg. Pollen, dust mite, saw dust, cayenne pepper, lint etc

Minimum air filtration.
Residential filtration
Prefiltration for higher efficiency air filtration.

FW and Panel filters

G2

-

65-80%

G3

-

80-90%

3-10µm particles Eg. Spray paint, spores, mould, Cement dust, hair spray, fabric protector

Small commercial units (less than 1500l/s).
Factories and general industrial.
Train ventilation
Prefiltration for higher efficiency filtration

FP bag filters
Panel filters
VF filters
Pleated panel filters

G4

-

>90%

F5

40-60%

1-3µm particles . Eg. Most bacteria, Legionella bacteria, milled flour, most droplet nuclei (liquid droplet containing bacteria eg. Sneeze), fly ash, auto emissions, lead dust

Larger commercial units (above 1500 l/s)
Chemical plants
Pharmaceutical and food industry
Paint spray plants.
Public arenas
Prefiltration for higher efficiency filtration

Bag filters
Filtrair CC600G
Pocket filters

F6

60-80%

F7

80-90%

0.3-1µm particles . Eg. Bacteria, Droplet nuclei, asbestos, talc, burning wood, air freshener, paint pigments, most tobacco smoke.

Superior commercial units.
Gas turbines
Spray painting and car plants.
Offshore oil rigs.
Pharmaceutical and food processing.
Computer rooms, and electronic facilities
HVAC systems in laboratories, libraries, museums, airports and medical and clean room facilities.

Pocket filters
Rigid cell
FP Mini-pleat
Titan FP

F8

90-95%

F9

>95%

H10

85%

<0.3µm particles . Eg. Viruses, sea salt, carbon black, coal flue gas, radon progeny (radioactive) bacteriophage

Cleanrooms.

Clean benches for laboratories

Pharmaceutical manufacturing.

Surgeries

HEPA filter
HV (High Volume) HEPA
Ultrastar cleanroom panels
Ultrastar ducted terminal
Modules (ULPA)

H11

95%

H12

99.5%

H13

99.95%

H14

99.995%

U15

99.9995%