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987MB: Installation, Start-up, Operating and Service and Maintenance Instructions
Filter Media Pressure Drop (Clean) Versus Airflow - In. W.C. (Pa) (Continued)
16 x 25 Filter
Factory-Accessory
(406 x 635 mm)
Washable
CFM
L/s
(1-in. / 2.5 cm)
600
(283)
0.04
800
(378)
0.05
1000
(472)
0.06
1200
(566)
0.07
1400
(661)
0.08
1600
(755)
0.09
1800
(850)
0.10
20 x 25 Filter
Factory-Accessory
(508 x 635 mm)
Washable
CFM
(L/s)
(1-in. / 2.5 cm)
800
(378)
0.04
1000
(472)
0.05
1200
(566)
0.06
1400
(661)
0.07
1600
(755)
0.08
1800
(850)
0.08
2000
(944)
0.09
2200
(1038)
0.09
25 x 25 Filter
Factory-Accessory
(635 x 635 mm)
Washable
CFM
L/s
(1-in. / 2.5 cm)
800
(378)
0.03
1000
(472)
0.04
1200
(566)
0.05
1400
(661)
0.06
1600
(755)
0.06
1800
(850)
0.07
2000
(944)
0.08
2200
(1038)
0.08
The following equations relate Face Velocity (FPM), Filter Area and Airflow (CFM):
Filter Face Velocity = Airflow / Filter Area
Minimum Filter Area = Rated System Airflow / Maximum Filter Face Velocity
Factory-Accessory
Face Velocity
FPM
(m/s)
(1-in. / 2.5 cm)
200
(1)
0.04
300
(1.5)
0.05
400
(2)
0.07
500
(2.5)
0.08
600
(3)
0.09
700
(3.6)
0.10
FILTER CABINET HEIGHT - IN
(MM)
16 (406)
20 (508)
24 (610)
*. Filters with a side return-air may have a different filter size. Measure the filter to obtain the correct size.Recommended to maintain air filter face velocity. See Product Data for
part number.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Factory-Accessory
Media*
(4-in. / 10 cm)
(10)
0.05
(13)
(13)
0.07
(18)
(16)
0.11
(28)
(18)
0.15
(37)
(21)
0.19
(48)
(23)
0.24
(60)
(25)
-
-
Factory-Accessory
Media*
(4-in. / 10 cm)
(11)
0.05
(12)
(13)
0.07
(18)
(15)
0.09
(22)
(17)
0.12
(31)
(19)
0.15
(38)
(21)
0.18
(47)
(23)
0.22
(56)
(24)
0.26
(66)
Factory-Accessory
Media*
(4-in. / 10 cm)
(9)
0.03
(8)
(11)
0.05
(12)
(13)
0.07
(17)
(15)
0.09
(23)
(16)
0.12
(31)
(18)
0.14
(35)
(19)
0.16
(41)
(21)
0.19
(49)
Filter Media Pressure Drop (Clean) Versus Face Velocity- In. W.C. (Pa)
Washable
(1-in. / 2.5 cm)
(10)
0.05
(14)
0.09
(17)
0.13
(21)
0.18
(23)
0.23
(26)
0.29
Air Filter Located in Filter Cabinet
(1) 16 x 25 x 3/4* (406 x 635 x 19) or (1) 16 x 25 x 4-5/16 (406 x 635 x 110)
(1) 20 x 25 x 3/4* (508 x 635 x 19) or (1) 20 x 25 x 4-5/16 (508 x 635 x 110)
(1) 24 x 25 x 3/4*or (610 x 635 x 19) or (1) 24 x 25 x 4-5/16 (610 x 635 x 110)
Representative After-Market Filter Media*
Fiberglass*
(1-in. / 2.5 cm)
(2-in. / 5 cm)
0.06
(15)
0.09
0.08
(21)
0.13
0.11
(28)
0.17
0.14
(36)
0.22
0.18
(45)
0.28
0.21
(54)
-
0.26
(64)
-
Representative After-Market Filter Media*
Fiberglass*
(1-in. / 2.5 cm)
(2-in. / 5 cm)
0.06
(16)
0.09
0.08
(21)
0.13
0.11
(27)
0.16
0.13
(33)
0.20
0.16
(40)
0.24
0.18
(47)
0.29
0.21
(54)
-
0.25
(62)
-
Representative After-Market Filter Media*
Fiberglass*
(1-in. / 2.5 cm)
(2-in. / 5 cm)
0.05
(12)
0.07
0.06
(16)
0.09
0.08
(20)
0.12
0.10
(24)
0.15
0.11
(29)
0.18
0.13
(34)
0.21
0.16
(39)
0.24
0.18
(45)
0.28
Representative After-Market Filter Media*
Fiberglass*
(2-in. / 5 cm)
(13)
0.08
(20)
(22)
0.13
(34)
(32)
0.20
(50)
(44)
0.27
(69)
-
-
-
-
-
-
FILTER SIZE - IN (MM)
18
Pleated*
(1-in. / 2.5 cm)
(22)
0.20
(51)
0.13
(32)
0.29
(72)
0.20
(43)
-
-
0.27
(56)
-
-
(70)
-
-
-
-
-
-
-
-
Pleated*
(1-in. / 2.5 cm)
(24)
0.22
(55)
0.15
(32)
0.29
(72)
0.20
(41)
-
-
0.25
(51)
-
-
0.31
(61)
-
-
(73)
-
-
-
-
-
-
-
-
Pleated*
(1-in. / 2.5 cm)
(18)
0.17
(43)
0.11
(24)
0.22
(55)
0.15
(31)
0.27
(68)
0.18
(38)
-
-
0.23
(45)
-
-
0.28
(53)
-
-
(61)
-
-
(70)
-
-
Pleated*
(1-in. / 2.5 cm)
(2-in. / 5 cm)
0.18
(47)
0.12
0.30
(75)
0.21
-
-
0.31
-
-
-
-
-
-
-
-
-
FILTER TYPE
Washable or Media
Washable or Media
Washable or Media
(2-in. / 5 cm)
(34)
(49)
(67)
-
-
-
-
-
-
-
-
(2-in. / 5 cm)
(37)
(49)
(63)
(79)
-
-
-
-
-
-
-
-
(2-in. / 5 cm)
(28)
(37)
(47)
(58)
(69)
-
-
-
-
-
-
(31)
(52)
(78)
-
-
-
*
*
*
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