915SB: Installation, Start-up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
19
Table 7 – Filter Media Pressure Drop (Clean) Versus Airflow - In. W.C. (Pa)
If the filter size that you are looking for is not contained in
, refer to
for a comparison of Pressure Drop (initial/clean resistance to
airflow) versus Face Velocity for a variety of filter media types.
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
Table 8 – Filter Media Pressure Drop (Clean) Versus Face Velocity- In. W.C. (Pa)
14 x 25 Filter
(356 x 635 mm)
Factory-Accessory
Washable
Factory-Accessory
Media
Representative After-Market Filter Media
*
*. Representative estimates from filter manufacturer data sheets. See manufacturers’ specifications for pressure drop versus airflow data for specific filter media.
Fiberglass
Pleated
CFM
L/s
(1-in. / 2.5 cm)
(4-in. / 10 cm)
(1-in. / 2.5 cm)
(2-in. / 5 cm)
(1-in. / 2.5 cm)
(2-in. / 5 cm)
600
(283)
0.04
(12)
0.05
(12)
0.07
(17)
0.10
(26)
0.24
(60)
0.16
(40)
800
(378)
0.06
(15)
0.07
(19)
0.10
(25)
0.15
(39)
0.34
(85)
0.23
(59)
1000
(472)
0.07
(18)
0.10
(27)
0.13
(34)
0.21
(52)
-
-
0.32
(81)
1200
(566)
0.08
(20)
0.14
(36)
0.17
(43)
0.27
(68)
-
-
-
-
16 x 25 Filter
(406 x 635 mm)
Factory-Accessory
Washable
Factory-Accessory
Media
Representative After-Market Filter Media
Fiberglass
Pleated
CFM
L/s
(1-in. / 2.5 cm)
(4-in. / 10 cm)
(1-in. / 2.5 cm)
(2-in. / 5 cm)
(1-in. / 2.5 cm)
(2-in. / 5 cm)
600
(283)
0.04
(10)
0.05
(13)
0.06
(15)
0.09
(22)
0.20
(51)
0.13
(34)
800
(378)
0.05
(13)
0.07
(18)
0.08
(21)
0.13
(32)
0.29
(72)
0.20
(49)
1000
(472)
0.06
(16)
0.11
(28)
0.11
(28)
0.17
(43)
-
-
0.27
(67)
1200
(566)
0.07
(18)
0.15
(37)
0.14
(36)
0.22
(56)
-
-
-
-
1400
(661)
0.08
(21)
0.19
(48)
0.18
(45)
0.28
(70)
-
-
-
-
1600
(755)
0.09
(23)
0.24
(60)
0.21
(54)
-
-
-
-
-
-
1800
(850)
0.10
(25)
-
-
0.26
(64)
-
-
-
-
-
-
20 x 25 Filter
(508 x 635 mm)
Factory-Accessory
Washable
Factory-Accessory
Media
Representative After-Market Filter Media
Fiberglass
Pleated
CFM
(L/s)
(1-in. / 2.5 cm)
(4-in. / 10 cm)
(1-in. / 2.5 cm)
(2-in. / 5 cm)
(1-in. / 2.5 cm)
(2-in. / 5 cm)
800
(378)
0.04
(11)
0.05
(12)
0.06
(16)
0.09
(24)
0.22
(55)
0.15
(37)
1000
(472)
0.05
(13)
0.07
(18)
0.08
(21)
0.13
(32)
0.29
(72)
0.20
(49)
1200
(566)
0.06
(15)
0.09
(22)
0.11
(27)
0.16
(41)
-
-
0.25
(63)
1400
(661)
0.07
(17)
0.12
(31)
0.13
(33)
0.20
(51)
-
-
0.31
(79)
1600
(755)
0.08
(19)
0.15
(38)
0.16
(40)
0.24
(61)
-
-
-
-
1800
(850)
0.08
(21)
0.18
(47)
0.18
(47)
0.29
(73)
-
-
-
-
2000
(944)
0.09
(23)
0.22
(56)
0.21
(54)
-
-
-
-
-
-
2200
(1038)
0.09
(24)
0.26
(66)
0.25
(62)
-
-
-
-
-
-
25 x 25 Filter
(635 x 635 mm)
Factory-Accessory
Washable
Factory-Accessory
Media
Representative After-Market Filter Media
Fiberglass
Pleated
CFM
L/s
(1-in. / 2.5 cm)
(4-in. / 10 cm)
(1-in. / 2.5 cm)
(2-in. / 5 cm)
(1-in. / 2.5 cm)
(2-in. / 5 cm)
800
(378)
0.03
(9)
0.03
(8)
0.05
(12)
0.07
(18)
0.17
(43)
0.11
(28)
1000
(472)
0.04
(11)
0.05
(12)
0.06
(16)
0.09
(24)
0.22
(55)
0.15
(37)
1200
(566)
0.05
(13)
0.07
(17)
0.08
(20)
0.12
(31)
0.27
(68)
0.18
(47)
1400
(661)
0.06
(15)
0.09
(23)
0.10
(24)
0.15
(38)
-
-
0.23
(58)
1600
(755)
0.06
(16)
0.12
(31)
0.11
(29)
0.18
(45)
-
-
0.28
(69)
1800
(850)
0.07
(18)
0.14
(35)
0.13
(34)
0.21
(53)
-
-
-
-
2000
(944)
0.08
(19)
0.16
(41)
0.16
(39)
0.24
(61)
-
-
-
-
2200
(1038)
0.08
(21)
0.19
(49)
0.18
(45)
0.28
(70)
-
-
-
-
Face Velocity
Factory-Accessory
Washable
Representative After-Market Filter Media
*
*. Representative estimates from filter manufacturer data sheets. See manufacturers’ specifications for pressure drop versus airflow data for specific filter media.
Fiberglass
Pleated
FPM
(m/s)
(1-in. / 2.5 cm)
(1-in. / 2.5 cm)
(2-in. / 5 cm)
(1-in. / 2.5 cm)
(2-in. / 5 cm)
200
(1)
0.04
(10)
0.05
(13)
0.08
(20)
0.18
(47)
0.12
(31)
300
(1.5)
0.05
(14)
0.09
(22)
0.13
(34)
0.30
(75)
0.21
(52)
400
(2)
0.07
(17)
0.13
(32)
0.20
(50)
-
-
0.31
(78)
500
(2.5)
0.08
(21)
0.18
(44)
0.27
(69)
-
-
-
-
600
(3)
0.09
(23)
0.23
-
-
-
-
-
-
-
700
(3.6)
0.10
(26)
0.29
-
-
-
-
-
-
-
