Air Filtration

Synthetic Media Pre Filter (G4 / F7)

Washable synthetic-media pre/fine filters for comfort and non-critical industrial applications.

AHU fresh-air filtrationCommercial buildingsPre-filtration before fine filters
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Synthetic Media Pre Filter
Synthetic Media Pre Filter
PRODUCT OVERVIEW

Built for controlled air quality.

Washable synthetic-media pre/fine filters for comfort and non-critical industrial applications. Fine Airsys provides product configurations and sizes based on project requirements and application conditions.

Key features

  • 18 gauge aluminium or SS304 construction
  • washable media
  • EN-779 testing on testing rig.

Typical applications

AHU fresh-air filtrationCommercial buildingsPre-filtration before fine filters
SELECTION NOTES
ProductSynthetic Media Pre Filter
CategoryAir Filtration
Image SourceFine Airsys catalogue
ConfigurationProject-specific
EnquiryContact Fine Airsys
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Following are our EU 3 and EU 4 Standard Pre filters Sizes and Capacities with Initial Pressures as below:

Flange Type or Box Type

Filter Class Size
(Inches)		 Size
(MM)		 Capacity
(CFM)		 Capacity
(CMH)		 Initial Pressure Drop
(Pa)		 Efficiency Arrestence / Particle Size
G4 24" × 24" × 2" 610 × 610 2000 3400 40 Pa
(4 mm wg)		 >90% 10 Microns
20" × 20" × 2" 508 × 508 1400 2380
F7 24" × 24" × 12" 610 × 610 2000 3400 80 Pa
(8 mm wg)		 >98% 3 Micron
24" × 24" × 6" 610 × 610 1000 1700
18" × 18" × 12" 450 × 450 1100 1870
18" × 18" × 6" 450 × 450 550 940

Note: High temperature filters up to 500°C are also available.*

FILTER CLASSIFICATION AND PARTICLE SIZE EFFICIENCY CHART

Coarse Filters Medium Filters Fine Filters
Filter Classification
According EN779:2012 		G1 G2 G3 G4 M5 M6 F7 F8 F9
Average Arrestance (%) gravimetric 50<65 65<80 80<90 90< Am
Average Efficiency @ 0.4
Minimum Efficiency @ 0.4 µm DEHS > 35 > 55 > 70
Eurovent 4/5 Classification EU1 EU2 EU3 EU4 EU5 EU6 EU7 EU8 EU9
ASHRAE 52.2-2012 MERV 1 MERV 2/3/4 MERV 5 MERV 6/7/8 MERV 9/10 MERV 11/12 MERV 13 MERV 14 MERV 15/16
Particle Size G1 G2 G3 G4 M5 M6 F7 F8 F9
0.1 µm - - - - 0-10 5-15 25-35 35-45 45-60
0.3 µm - - - 0-5 5-15 10-25 45-60 65-75 75-85
0.5 µm - - 0-5 5-15 15-30 20-40 60-75 80-90 90-95
1 µm - 0-5 5-15 15-35 30-50 50-65 85-95 95-98 >98
3 µm 0-5 5-15 15-35 30-55 70-90 85-95 >98 >99 >99
5 µm 5-15 15-35 35-70 60-90 90-99 95-99 >99 >99 >99
10 µm 40-50 50-70 70-85 85-98 >98 >99 >99 >99 >99

Particle Size Efficiency Chart