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DUAL EMI
AIR FILTERS

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Dual EMI Air Filters

The new Dual EMI Honeycomb air filter provides superior shielding against electromagnetic interference and is specially designed for electronics, telecom and datacom equipment.

The filter performs three distinct functions:

EMI/RFI shielding with positive grounding.
Air straightening for maximum cooling efficiency.
High dust arrestance with low pressure drop.

The Universal Dual Honeycomb air filter reduces EMI/RFI noise by using an EMI shielding stainless steel mesh that is bonded to the aluminum frame with a conductive silver/copper adhesive caulk. In addition, an EMI shielding gasket is installed around the frame perimeter. The gasket ensures full conductivity of the frame to the equipment. Moreover, the honeycomb structure provides “cells” that are designed to reflect and absorb EMI noise. The honeycomb pattern maintains minimal airflow impedance, and provides a “straightening” effect for even air distribution.

The Dual Honeycomb air filter also offers these benefits:

Performance specifications that meet the requirements of CE, Telcordia NEBS and UL.
Flame-retardant, open-cell poly-urethane foam filter media for high dust arrestance.
Removable, cleanable and reusable.

Applications

Dual Honeycomb air filters are designed for electronics, telecom or datacom equipment where EMI/RFI interference could result in equipment malfunction. Filters are designed to be cleanable and reusable as needed. Dual Honeycomb air filters are custom designed for each application. Order a free air filter prototype for your application today.

Media

Quadrafoam – an open cell polyurethane foam – is used as the filtering media in Dual Honeycomb air filters. This media is specially coated to provide improved fire retardancy and fungi resistance. It has deep loading, high dust holding capacity and low air resistance. Quadrafoam is cleanable and reusable. Quadrafoam is available in various pores per inch (PPI) ranging from 10 through 60 PPI.

Standards & Classifications

UL 900 Class 2, UL 94 HF-1
Telcordia NEBS GR-78-CORE
Telcordia NEBS GR- 63-CORE
FMVSS 302

Model	Quadrafoam Media Thickness	Frame Thickness	Frame Face Flange Width (REF)
FF-3	.25	.30	.25 or .50
FF-5	.25 or .375	.43	.375
FF-5X	.375 or .50	.50	.25 or .50
FF-1025-B	.25	.88	.625
FF-1050-B	.50	.88	.625

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, (REF) frame face flange width
Pad Filters +/-.12" length & width, +/-.06" thickness

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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.

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)

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.