WINDOWPANE
AIR FILTERS
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Windowpane Air Filters


Windowpane Air Filters

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Windowpane air filters are the ideal solution to meet the low profile and edge-to-edge filter needs of communications electronics applications. Windowpanes help telecom/datacom electronics designers meet the stringent requirements of the Telcordia NEBS standards. The special design creates a sturdy air filter even when the combined thickness of filter media and frame is as thin as ¼" for applications where space is limited.   Order a free air filter prototype for your application today.

Specifications

Universal Air Filter can customize Windowpane filters to meet Telcordia Standards for telecommunications and data communications equipment. Filters are designed to meet:
  1. "GR-63-CORE, Network Equipment Building System (NEBS) Requirements : Physical Protection, Environmental Criteria, Issue 2, April 2002."

    This guideline specifies UL 94 HF-1 filter media flame rating, minimum 80% dust arrestance, and UL 900 Class 2 framed filter fire rating.

  2. "GR-78-CORE, Generic Physical Design Requirements for Telecommunications Products and Equipment, Issue 3, December 1991."

    This guideline specifies minimum 80% dust arrestance and UL 900 Class 2 framed filter fire rating.

Media

Cleanable black, gray or green Quadrafoam is specified for Windowpane air filters. Quadrafoam is an open cell polyurethane foam specially coated to meet UL 94 HF-1. It features deep loading, large dust holding capacity and low air resistance. Quadrafoam is available in various pores per inch (PPI) ranging from 10 through 60 PPI.

Frame

Windowpane air filters maintain necessary rigidity, keeping their shape and staying in place with an innovative "frame-n-pane" design that integrates the frame and a series of crossing, reinforcing intermediates that provide media support. Pane sizes and frame thickness are customized to the equipment's needs.

Model

Media
Thickness

Frame
Thickness

3D CAD Model

FS-XX25

.25

.25 - .375

Create & Download

FS-XX50

.50

.375 - .875

XX - Denotes Quadrafoam PPI

Filtration Performance Data

Hover over the links below to view the filtration performance data for each media.

Media Printer Version
Quadrafoam Print
Polyester Print
Uni-Foam Print
Quadrafoam II Print

Tolerances

Framed Filters +/-.06" length & width, +/-.03" thickness
Pad Filters +/-.12" length & width, +/-.06" thickness
Click here to order your free made-to-spec prototype

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Copyright © 2007 Universal Air Filter. All Rights Reserved
 

QUADRAFOAM
FILTRATION PERFORMANCE DATA

Models
FF-2X, FF-3, FF-5, FF-1025-B, Windowpane, Flex-Frame, Dual/EMI
0.25 in (6,35 mm)
Thick Foam Media

 

Models
FF-5X, FF-1050B, Windowpane, Flex-Frame, Dual/EMI
0.50 in (12,70 mm)
Thick Foam Media

 

Models
FF-2X, Windowpane, Flex-Frame, Dual/EMI
0.125 in (3,18 mm)
Thick Foam Media

10
PPI

25
PPI

45
PPI

60
PPI

 

10
PPI

25
PPI

45
PPI

60
PPI

 

45
PPI

80
PPI

Inital Resistance[in inches (Pascals) water gauge]

0.01
(2,49)

0.05
(12,44)

0.07
(17,41)

0.12
(29,84)

 

0.03
(7,46)

0.08
(19,89)

0.16
(39,78)

0.25
(62,16)

 

0.04
(9,95)

0.12
(29,84)

 

Average Synthetic Dust Weight Arrestance (percent)

38

66

80

82

 

63

83

91

91

 

65

81

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

QUADRAFOAM II
FILTRATION PERFORMANCE DATA

Models
FF-2X, FF-3, FF-5, FF-1025-B, Windowpane, Flex-Frame, Dual/EMI
0.25 in (6,35 mm)
Thick Foam Media

 

Models
FF-5X, FF-1050B, Windowpane, Flex-Frame, Dual/EMI
0.50 in (12,70 mm)
Thick Foam Media

 

Models
FF-2X, Windowpane, Flex-Frame, Dual/EMI
0.125 in (3,18 mm)
Thick Foam Media

10
PPI

30
PPI

45
PPI

 

10
PPI

30
PPI

45
PPI

 

45
PPI

80
PPI

Inital Resistance[in inches (Pascals) water gauge]

0.01
(2,49)

0.05
(12,44)

0.07
(17,41)

 

0.03
(7,46)

0.09
(22,38)

0.16
(39,78)

 

0.04
(9,95)

0.12
(29,84)

 

Average Synthetic Dust Weight Arrestance (percent)

38

66

80

 

63

83

91

 

65

81

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

EMI VENT PANEL
FILTRATION PERFORMANCE DATA

Models
HC-2X, Windowpane 0.125 in (3,18) x 0.125 in (3,18)
Thick Foam Media

 

Models
HC-3, WINDOWPANE 0.125 in (3,18) x 0.25in (6,35mm)
Thick Foam Media

 

Models
HC-5X 0.125 in (3,18) x 0.50in (12,70mm)
Thick Foam Media

Inital Resistance[in inches (Pascals) water gauge]

0.005
(1,24)

 

0.007
(1,74)

 

0.01
(2,49)

 

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

DUAL EMI AIR FILTERS - QUADRAFOAM
FILTRATION PERFORMANCE DATA

Models
FF-2X, FF-3, FF-5, FF-1025-B, Windowpane, Flex-Frame, Dual/EMI
0.25 in (6,35 mm)

Thick Foam Media

 

Models
FF-5X, FF-1050B, Windowpane, Flex-Frame, Dual/EMI
0.50 in (12,70 mm)

Thick Foam Media

 

Models
FF-2X, Windowpane, Flex-Frame, Dual/EMI
0.125 in (3,18 mm)

Thick Foam Media

10
PPI

25
PPI

45
PPI

60
PPI

 

10
PPI

25
PPI

45
PPI

60
PPI

 

45
PPI

80
PPI

Inital Resistance[in inches (Pascals) water gauge]

0.01
(2,49)

0.05
(12,44)

0.07
(17,41)

0.12
(29,84)

 

0.03
(7,46)

0.08
(19,89)

0.16
(39,78)

0.25
(62,16)

 

0.04
(9,95)

0.12
(29,84)

 

Average Synthetic Dust Weight Arrestance (percent)

38

66

80

82

 

63

83

91

91

 

65

81

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

DUAL EMI AIR FILTERS - POLYESTER
FILTRATION PERFORMANCE DATA

Models
PE-2X, PE-3, PE-5, PE-1025-B, PFPE-25, Windowpane
UFM-25 --
0.25 In (6,35 mm)
Thick Foam Media

 

Models
PE-3, PE-5X, PE-1050-B, PFPE-50, Windowpane
UFM-50 / UPR --
0.50 in (12,70 mm)
Thick Foam Media

 

Models
PE-5X, PE-1050-B, Windowpane
UFM-100 --
1.00 in
(25,40 mm)
Thick Foam Media

UFM-25

UFM-50

UPR

UFM-100

UPR

Inital Resistance[in inches (Pascals) water gauge]

0.07
(17,41)

0.10 (24,86)

0.14 (34,81)

0.14
(34,81)

0.14
(34,81)

 

Average Synthetic Dust Weight Arrestance (percent)

74

80

83

89

83

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

DUAL EMI AIR FILTERS - UNIFOAM
FILTRATION PERFORMANCE DATA

Models
FF-2X, FF-3, FF-5, FF-1025-B, Windowpane, Flex-Frame, Dual/EMI
0.25 in (6,35 mm)
Thick Foam Media

 

Models
FF-5X, FF-1050B, Windowpane, Flex-Frame, Dual/EMI
0.50 in (12,70 mm)
Thick Foam Media

 

Models
FF-2X, Windowpane, Flex-Frame, Dual/EMI
0.125 in (3,18 mm)
Thick Foam Media

10
PPI

25
PPI

45
PPI

60
PPI

 

10
PPI

25
PPI

45
PPI

60
PPI

 

45
PPI

80
PPI

Inital Resistance[in inches (Pascals) water gauge]

0.01
(2,49)

0.03 (7,46)

0.07
(17,41)

0.12
(29,84)

 

0.03
(7,46)

0.08
(19,89)

0.16
(39,78)

0.25
(62,16)

 

0.04
(9,95)

0.12
(29,84)

 

Average Synthetic Dust Weight Arrestance (percent)

38

63

80

82

 

63

83

91

91

 

65

81

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

DUAL EMI AIR FILTERS - QUADRAFOAM II
FILTRATION PERFORMANCE DATA

Models
FF-2X, FF-3, FF-5, FF-1025-B, Windowpane, Flex-Frame, Dual/EMI
0.25 in (6,35 mm)
Thick Foam Media

 

Models
FF-5X, FF-1050B, Windowpane, Flex-Frame, Dual/EMI
0.50 in (12,70 mm)
Thick Foam Media

 

Models
FF-2X, Windowpane, Flex-Frame, Dual/EMI
0.125 in
(3,18 mm)
Thick Foam Media

10
PPI

30
PPI

45
PPI

 

10
PPI

30
PPI

45
PPI

 

45
PPI

80
PPI

Inital Resistance[in inches (Pascals) water gauge]

0.01
(2,49)

0.05
(12,44)

0.07
(17,41)

 

0.03
(7,46)

0.09
(22,38)

0.16
(39,78)

 

0.04
(9,95)

0.12
(29,84)

 

Average Synthetic Dust Weight Arrestance (percent)

38

66

80

 

63

83

91

 

65

81

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

WINDOWPANE AIR FILTERS - QUADRAFOAM
FILTRATION PERFORMANCE DATA

Models
FS-XX25
0.25 in (6,35 mm)
Thick Foam Media

 

Models
FS-XX50
0.50 in (12,70 mm)
Thick Foam Media

 

Models
FS-XX12
0.125 in (3,18 mm)
Thick Foam Media

10
PPI

25
PPI

45
PPI

60
PPI

 

10
PPI

25
PPI

45
PPI

60
PPI

 

45
PPI

80
PPI

Inital Resistance[in inches (Pascals) water gauge]

0.01
(2,49)

0.05
(12,44)

0.07
(17,41)

0.12
(29,84)

 

0.03
(7,46)

0.08
(19,89)

0.16
(39,78)

0.25
(62,16)

 

0.04
(9,95)

0.12
(29,84)

 

Average Synthetic Dust Weight Arrestance (percent)

38

66

80

82

 

63

83

91

91

 

65

81

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

WINDOWPANE AIR FILTERS - POLYESTER
FILTRATION PERFORMANCE DATA

Models
FS-XX25
UFM-25 --
0.25 In (6,35 mm)
Thick Foam Media

 

Models
FS-XX50
0.50 in (12,70 mm)
Thick Foam Media

 

Models
FS-XX12
1.00 in
(25,40 mm)
Thick Foam Media

UFM-25

UFM-50

UPR

UFM-
100

UPR

Inital Resistance[in inches (Pascals) water gauge]

0.07
(17,41)

0.10
(24,86)

0.14
(34,81)

0.14
(34,81)

0.14
(34,81)

 

Average Synthetic Dust Weight Arrestance (percent)

74

80

83

89

83

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

WINDOWPANE AIR FILTERS - UNIFOAM
FILTRATION PERFORMANCE DATA

Models
FS-XX25
0.25 in (6,35 mm)
Thick Foam Media

 

Models
FS-XX50
0.50 in (12,70 mm)
Thick Foam Media

 

Models
FS-XX12
0.125 in (3,18 mm)
Thick Foam Media

10
PPI

25
PPI

45
PPI

60
PPI

 

10
PPI

25
PPI

45
PPI

60
PPI

 

45
PPI

80
PPI

Inital Resistance[in inches (Pascals) water gauge]

0.01
(2,49)

0.03 (7,46)

0.07
(17,41)

0.12
(29,84)

 

0.03
(7,46)

0.08
(19,89)

0.16
(39,78)

0.25
(62,16)

 

0.04
(9,95)

0.12
(29,84)

 

Average Synthetic Dust Weight Arrestance (percent)

38

63

80

82

 

63

83

91

91

 

65

81

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

WINDOWPANE AIR FILTERS - QUADRAFOAM II
FILTRATION PERFORMANCE DATA

Models
FS-XX25
0.25 in (6,35 mm)
Thick Foam Media

 

Models
FS-XX50
0.50 in (12,70 mm)
Thick Foam Media

 

Models
FS-XX12
0.125 in
(3,18 mm)
Thick Foam Media

10
PPI

30
PPI

45
PPI

 

10
PPI

30
PPI

45
PPI

 

45
PPI

80
PPI

Inital Resistance[in inches (Pascals) water gauge]

0.01
(2,49)

0.05
(12,44)

0.07
(17,41)

 

0.03
(7,46)

0.09
(22,38)

0.16
(39,78)

 

0.04
(9,95)

0.12
(29,84)

 

Average Synthetic Dust Weight Arrestance (percent)

38

66

80

 

63

83

91

 

65

81

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

PYROCIDE VENT PANELS
FILTRATION PERFORMANCE DATA

Models
HC-2X, Windowpane 0.125 in (3,18) x 0.125 in (3,18)
Thick Foam Media

Models
HC-3, WINDOWPANE 0.125 in (3,18) x 0.25in (6,35mm)
Thick Foam Media

Models
HC-5X 0.125 in (3,18) x 0.50in (12,70mm)
Thick Foam Media

Inital Resistance[in inches (Pascals) water gauge]

0.006
(1,49)

 

0.008
(1,99)

 

0.01
(2,49)

 

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

FLEX-FRAME AIR FILTERS - QUADRAFOAM
FILTRATION PERFORMANCE DATA

Models
FF-2X, FF-3, FF-5, FF-1025-B, Windowpane, Flex-Frame, Dual/EMI
0.25 in (6,35 mm)
Thick Foam Media

 

Models
FF-5X, FF-1050B, Windowpane, Flex-Frame, Dual/EMI
0.50 in (12,70 mm)
Thick Foam Media

 

Models
FF-2X, Windowpane, Flex-Frame, Dual/EMI
0.125 in (3,18 mm)
Thick Foam Media

10
PPI

25
PPI

45
PPI

60
PPI

 

10
PPI

25
PPI

45
PPI

60
PPI

 

45
PPI

80
PPI

Inital Resistance[in inches (Pascals) water gauge]

0.01
(2,49)

0.05
(12,44)

0.07
(17,41)

0.12
(29,84)

 

0.03
(7,46)

0.08
(19,89)

0.16
(39,78)

0.25
(62,16)

 

0.04
(9,95)

0.12
(29,84)

 

Average Synthetic Dust Weight Arrestance (percent)

38

66

80

82

 

63

83

91

91

 

65

81

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

FLEX-FRAME AIR FILTERS - UNIFOAM
FILTRATION PERFORMANCE DATA

Models
FF-2X, FF-3, FF-5, FF-1025-B, Windowpane, Flex-Frame, Dual/EMI
0.25 in (6,35 mm)
Thick Foam Media

 

Models
FF-5X, FF-1050B, Windowpane, Flex-Frame, Dual/EMI
0.50 in (12,70 mm)
Thick Foam Media

 

Models
FF-2X, Windowpane, Flex-Frame, Dual/EMI
0.125 in (3,18 mm)
Thick Foam Media

10
PPI

25
PPI

45
PPI

60
PPI

 

10
PPI

25
PPI

45
PPI

60
PPI

 

45
PPI

80
PPI

Inital Resistance[in inches (Pascals) water gauge]

0.01
(2,49)

0.03 (7,46)

0.07
(17,41)

0.12
(29,84)

 

0.03
(7,46)

0.08
(19,89)

0.16
(39,78)

0.25
(62,16)

 

0.04
(9,95)

0.12
(29,84)

 

Average Synthetic Dust Weight Arrestance (percent)

38

63

80

82

 

63

83

91

91

 

65

81

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

FLEX-FRAME AIR FILTERS - QUADRAFOAM II
FILTRATION PERFORMANCE DATA

Models
FF-2X, FF-3, FF-5, FF-1025-B, Windowpane, Flex-Frame, Dual/EMI
0.25 in (6,35 mm)
Thick Foam Media

 

Models
FF-5X, FF-1050B, Windowpane, Flex-Frame, Dual/EMI
0.50 in (12,70 mm)
Thick Foam Media

 

Models
FF-2X, Windowpane, Flex-Frame, Dual/EMI
0.125 in
(3,18 mm)
Thick Foam Media

10
PPI

30
PPI

45
PPI

 

10
PPI

30
PPI

45
PPI

 

45
PPI

80
PPI

Inital Resistance[in inches (Pascals) water gauge]

0.01
(2,49)

0.05
(12,44)

0.07
(17,41)

 

0.03
(7,46)

0.09
(22,38)

0.16
(39,78)

 

0.04
(9,95)

0.12
(29,84)

 

Average Synthetic Dust Weight Arrestance (percent)

38

66

80

 

63

83

91

 

65

81

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

POLYESTER AIR FILTERS
FILTRATION PERFORMANCE DATA

Models
PE-2X, PE-3, PE-5, PE-1025-B, Polyfold, Windowpane UFM-25 -- 0.25 In (6,35 mm)
Thick Foam Media

Models
PE-3, PE-5X, PE-1050-B, Polyfold, Windowpane UFM-50 / UPR -- 0.50 in (12,70 mm)
Thick Foam Media

Models
PE-5X, PE-1050-B, Polyfold, Windowpane UFM-100 -- 1.00 in (25,40 mm)
Thick Foam Media

UFM-25

UFM-50

UPR

UFM-
100

UPR

Inital Resistance[in inches (Pascals) water gauge]

0.07
(17,41)

0.10
(24,86)

0.14
(34,81)

0.14
(34,81)

0.14
(34,81)

 

Average Synthetic Dust Weight Arrestance (percent)

74

80

83

89

83

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

POLYFOLD AIR FILTERS - QUADRAFOAM
FILTRATION PERFORMANCE DATA

Models
PF-1025, PF-2525, PF-4525, PF-6025
0.25 in (6,35 mm)
Thick Foam Media

 

Models
PF-1050, PF-2550, PF-4550, PF-6050
0.50 in (12,70 mm)

Thick Foam Media

 

Models
PF-1012, PF-2512, PF-4512, PF-6012
0.125 in (3,18 mm)

Thick Foam Media

10
PPI

25
PPI

45
PPI

60
PPI

 

10
PPI

25
PPI

45
PPI

60
PPI

 

45
PPI

80
PPI

Inital Resistance[in inches (Pascals) water gauge]

0.01
(2,49)

0.04 (9,95)

0.05 (12,44)

0.10 (24,87)

 

0.03 (7,46)

0.07 (17,41)

0.12 (29,84)

0.25 (62,16)

 

0.03
(7,46)

0.10
(24,87)

 

Average Synthetic Dust Weight Arrestance (percent)

38

66

80

82

 

63

83

91

91

 

65

81

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

POLYFOLD AIR FILTERS - POLYESTER
FILTRATION PERFORMANCE DATA

Models
PFPE-25
UFM-25 -- 0.25 In (6,35 mm)
Thick Foam Media

 

Models
PFPE-50
UFM-50 / UPR -- 0.50 in (12,70 mm)
Thick Foam Media

 

Models
PFPE-100
UFM-100 -- 1.00 in (25,40 mm)
Thick Foam Media

UFM-25

UFM-50

UFM-100

Inital Resistance[in inches (Pascals) water gauge]

0.05
(12,44)

0.09
(22,38)

0.12
(29,84)

 

Average Synthetic Dust Weight Arrestance (percent)

74

88

89

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

POLYFOLD AIR FILTERS - UNIFOAM
FILTRATION PERFORMANCE DATA

Models
PF-1025, PF-2525, PF-4525, PF-6025
0.25 in (6,35 mm)
Thick Foam Media

 

Models
PF-1050, PF-2550, PF-4550, PF-6050
0.50 in (12,70 mm)

Thick Foam Media

 

Models
PF-1012, PF-2512, PF-4512, PF-6012
0.125 in (3,18 mm)

Thick Foam Media

10
PPI

25
PPI

45
PPI

60
PPI

 

10
PPI

25
PPI

45
PPI

60
PPI

 

45
PPI

80
PPI

Inital Resistance[in inches (Pascals) water gauge]

0.01
(2,49)

0.04 (9,95)

0.05 (12,44)

0.10 (24,87)

 

0.03 (7,46)

0.07 (17,41)

0.12 (29,84)

0.25 (62,16)

 

0.03
(7,46)

0.10
(24,87)

 

Average Synthetic Dust Weight Arrestance (percent)

38

66

80

82

 

63

83

91

91

 

65

81

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

POLYFOLD AIR FILTERS - QUADRAFOAM II
FILTRATION PERFORMANCE DATA

Models
PF-1025, PF-2525, PF-4525, PF-6025
0.25 in (6,35 mm)
Thick Foam Media

 

Models
PF-1050, PF-2550, PF-4550, PF-6050
0.50 in (12,70 mm)
Thick Foam Media

 

Models
PF-1012, PF-2512, PF-4512, PF-6012
0.125 in
(3,18 mm)
Thick Foam Media

10
PPI

30
PPI

45
PPI

 

10
PPI

30
PPI

45
PPI

 

45
PPI

80
PPI

Inital Resistance[in inches (Pascals) water gauge]

0.01
(2,49)

0.04 (9,95)

0.05 (12,44)

 

0.03 (7,46)

0.07 (17,41)

0.12 (29,84)

 

0.03
(7,46)

0.10
(24,87)

 

Average Synthetic Dust Weight Arrestance (percent)

38

66

80

 

63

83

91

 

65

81

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.

UNIFOAM AIR FILTERS
FILTRATION PERFORMANCE DATA

Models
FF-2X, FF-3, FF-5, FF-1025-B, Windowpane, Flex-Frame, Dual/EMI
0.25 in (6,35 mm)
Thick Foam Media

 

Models
FF-5X, FF-1050B, Windowpane, Flex-Frame, Dual/EMI
0.50 in (12,70 mm)
Thick Foam Media

 

Models
FF-2X, Windowpane, Flex-Frame, Dual/EMI
0.125 in (3,18 mm)
Thick Foam Media

10
PPI

25
PPI

45
PPI

60
PPI

 

10
PPI

25
PPI

45
PPI

60
PPI

 

45
PPI

80
PPI

Inital Resistance[in inches (Pascals) water gauge]

0.01
(2,49)

0.03
(7,46)

0.07
(17,41)

0.12
(29,84)

 

0.03
(7,46)

0.08
(19,89)

0.16
(39,78)

0.25
(62,16)

 

0.04
(9,95)

0.12
(29,84)

 

Average Synthetic Dust Weight Arrestance (percent)

38

63

80

82

 

63

83

91

91

 

65

81

Tests performed according to ASHRAE Standard 52.1 -1992 
at 300 feet per minute (1,53 m/s) face velocity.