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59SC6A: 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.

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 7, refer to Table 8 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)