N95ESN: 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.
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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 Table 6, refer to Table 7 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
Factory-Accy
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
*
CFM L/s (1-in. / 2.5 cm) (1-in. / 2.5 cm) (2-in. / 5 cm) (1-in. / 2.5 cm) (2-in. / 5 cm)
600 (283) 0.04 (12) 0.07 (17) 0.10 (26) 0.24 (60) 0.16 (40)
800 (378) 0.06 (15) 0.10 (25) 0.15 (39) 0.34 (85) 0.23 (59)
1000 (472) 0.07 (18) 0.13 (34) 0.21 (52) - - 0.32 (81)
1200 (566) 0.08 (20) 0.17 (43) 0.27 (68) - - - -
16x 25 Filter
Factory-Accy
Washable
Representative After-Market Filter Media
*
Fiberglass
*
Pleated
*
CFM L/s (1-in. / 2.5 cm) (1-in. / 2.5 cm) (2-in. / 5 cm) (1-in. / 2.5 cm) (2-in. / 5 cm)
600 (283) 0.04 (10) 0.06 (15) 0.09 (22) 0.20 (51) 0.13 (34)
800 (378) 0.05 (13) 0.08 (21) 0.13 (32) 0.29 (72) 0.20 (49)
1000 (472) 0.06 (16) 0.11 (28) 0.17 (43) - - 0.27 (67)
1200 (566) 0.07 (18) 0.14 (36) 0.22 (56) - - - -
1400 (661) 0.08 (21) 0.18 (45) 0.28 (70) - - - -
1600 (755) 0.09 (23) 0.21 (54) - - - - - -
1800 (850) 0.10 (25) 0.26 (64) - - - - - -
20 x 25 Filter
Factory-Accy
Washable
Representative After-Market Filter Media
*
Fiberglass
*
Pleated
*
CFM (L/s) (1-in. / 2.5 cm) (1-in. / 2.5 cm) (2-in. / 5 cm) (1-in. / 2.5 cm) (2-in. / 5 cm)
800 (378) 0.04 (11) 0.06 (16) 0.09 (24) 0.22 (55) 0.15 (37)
1000 (472) 0.05 (13) 0.08 (21) 0.13 (32) 0.29 (72) 0.20 (49)
1200 (566) 0.06 (15) 0.11 (27) 0.16 (41) - - 0.25 (63)
1400 (661) 0.07 (17) 0.13 (33) 0.20 (51) - - 0.31 (79)
1600 (755) 0.08 (19) 0.16 (40) 0.24 (61) - - - -
1800 (850) 0.08 (21) 0.18 (47) 0.29 (73) - - - -
2000 (944) 0.09 (23) 0.21 (54) - - - - - -
2200 (1038) 0.09 (24) 0.25 (62) - - - - - -
25 x 25 Filter
Factory-Accy
Washable
Representative After-Market Filter Media
*
Fiberglass
*
Pleated
*
CFM L/s (1-in. / 2.5 cm) (1-in. / 2.5 cm) (2-in. / 5 cm) (1-in. / 2.5 cm) (2-in. / 5 cm)
800 (378) 0.03 (9) 0.05 (12) 0.07 (18) 0.17 (43) 0.11 (28)
1000 (472) 0.04 (11) 0.06 (16) 0.09 (24) 0.22 (55) 0.15 (37)
1200 (566) 0.05 (13) 0.08 (20) 0.12 (31) 0.27 (68) 0.18 (47)
1400 (661) 0.06 (15) 0.10 (24) 0.15 (38) - - 0.23 (58)
1600 (755) 0.06 (16) 0.11 (29) 0.18 (45) - - 0.28 (69)
1800 (850) 0.07 (18) 0.13 (34) 0.21 (53) - - - -
2000 (944) 0.08 (19) 0.16 (39) 0.24 (61) - - - -
2200 (1038) 0.08 (21) 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 - - - - - - -
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