Frequently Asked Air Filter Answers - Universal Air Filter (UAF)

5. 如何预测空气过滤器对总体系统压降的影响？

热分析软件可供散热/机械设计师模拟和预测冷却要求。配置了热分析资料库的热管理软件组合，使用户能通过空气过滤器要素，迅速准确地预测压降。UAF公司已经向Flotherm、Icepak、Macroflow和Coolit等热分析软件的供应商提供了过滤性能数据，以便将过滤器的热分析资料库纳入其软件中。热分析资料库现在可以用于设计阶段的早期，提高热分析的准确度。

目前的趋势是缩小底架和提高瓦数，这就需要更多的数据。热建模软件组合能将空气过滤器对系统压降的影响纳入考虑范围。如果需要UAF公司可提供压降和过滤性能数据。

空气过滤器的初阻力和容尘数据是判定空气过滤器性能和可靠性的宝贵资料。OEM设计师在各类电子和工业应用中使用UAF空气过滤器，会享有优势。

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6. 泡沫的贮藏期限是多久，有哪些推荐的贮藏方法？

由于空气过滤器泡沫可能受到各种环境因素的影响，而这些环境因素超出了我们的控制范围，所以UAF公司不预期其使用寿命。“贮存期限”一般不是指使用寿命，这是一个相对用语。

聚氨酯泡沫的理想贮藏条件是凉爽、干燥、阴暗的环境。高温、潮湿和紫外线不利于介质。泡沫介质接触溶剂和硫酸盐，如发动机尾气，也会降低使用寿命。泡沫寿命的降低幅度取决于泡沫贮藏条件与理想条件的差距程度。

根据客户反馈，相对湿度控制在40%-80%，温度控制在40F-90F，是比较合适的环境。用深色塑料覆盖过滤器可保持介质干燥，免于紫外线照射。

我们建议，不要把泡沫过滤器一连贮存数月或几年。而要在符合成本效益的前提下，购买一定的数量，保持库存充裕，贮存期限不要超过几个月。

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7. 空气过滤器应多长时间清洁或更换一次？

过滤器的维护间隔时间视应用场合而定，取决于使用过滤器的设备类型，以及设备所处的环境条件。有些设备设计工程师根据设备运转时间，在设备显示器的控制软件上加上何时应维护过滤器的指示。另一些工程师在过滤器的下游位置加上压力和/或温度传感器，探测过滤器何时达到满负荷并需要更换。业内通行的做法是，电子设备设计师建议每隔大约90天清洁或更换空气过滤器。

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8. UAF公司生产HEPA或其他高效空气过滤器吗？

UAF公司生产用于HEPA和洁净室的可清洗预滤器。这些过滤器设计用于延长成本较高的一次性HEPA过滤器的寿命。

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9. 框架式空气过滤器和空气过滤板的制造误差是多少？

框架式过滤器 +/-.06" 长度和宽度，+/-.03" 厚度
过滤板 +/-.12" 长度和宽度，+/-.06" 厚度

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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 water gauge] (Pascals)
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 water gauge] (Pascals)
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 water gauge] (Pascals)

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 water gauge] (Pascals)
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 water gauge] (Pascals)
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 water gauge] (Pascals)
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 water gauge] (Pascals)
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 water gauge] (Pascals)
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 water gauge] (Pascals)
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 water gauge] (Pascals)
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 water gauge] (Pascals)
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 water gauge] (Pascals)

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 water gauge] (Pascals)
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 water gauge] (Pascals)
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 water gauge] (Pascals)
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 water gauge] (Pascals)
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 water gauge] (Pascals)
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 water gauge] (Pascals)

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 water gauge] (Pascals)
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 water gauge] (Pascals)
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 water gauge] (Pascals)
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.

METAL MESH FILTRATION PERFORMANCE DATA
Models FF-2X, FF-3, FF-5, FF-1025-B, Windowpane 0.25 in (6,35 mm) Thick Metal Mesh Media		Models FF-5X, FF-1050B, Windowpane 0.50 in (12,70 mm) Thick Metal Mesh Media
Initial Resistance[in inches water gauge] (Pascals)
0.07 (17,41)		0.14 (34,82)

Average Synthetic Dust Weight Arrestance (percent)
46		62
Tests performed according to ASHRAE Standard 52.1 -1992 at 300 feet per minute (1,53 m/s) face velocity.