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59SU5A: Installation, Start-up, Operating and Service Maintenance Instructions
FURNACE CASING WIDTH
†
14-3/16 (360)
17-1/2 (445)
21 (533)
24-1/2 (622){
*. Recommended to maintain air filter face velocity. See Product Data for part number.
†. Not all families have these models.
FURNACE
CASING WIDTH
IN. (mm)
14–3/16
Upflow Applications on Combustible or Noncombustible Flooring
*
(360)
17–1/2
Upflow Applications on Combustible or Noncombustible Flooring
(445)
21
Upflow Applications on Combustible or Noncombustible Flooring
(533)
24-1/2
Upflow Applications on Combustible or Noncombustible Flooring
*
(622)
Not all families have these models.
*.
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
If the filter size that you are looking for is not contained in
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
Factory-Accessory
Face Velocity
FPM
(m/s)
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
*. Representative estimates from filter manufacturer data sheets.
See manufacturers' specifications for pressure drop versus airflow data for specific filter media.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 7 – Air Filter Selection and Duct Sizing - In. (mm)
SIDE RETURN
16 x 25 x 3/4 (406 x 635 x 19)
16 x 25 x 3/4 (406 x 635 x 19)
16 x 25 x 3/4 (406 x 635 x 19)
16 x 25 x 3/4 (406 x 635 x 19)
Table 8 – Opening Dimensions - In. (mm)
APPLICATION
(subbase not required)
(subbase not required)
(subbase not required)
(subbase not required)
Table 9 – Filter Media Pressure Drop (Clean) Versus Airflow - In. W.C. (Pa)
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)
Table
Table 10 – Filter Media Pressure Drop (Clean) Versus Face Velocity- In. W.C. (Pa)
Washable
(1-in. / 2.5 cm)
(1-in. / 2.5 cm)
(10)
0.05
(14)
0.09
(17)
0.13
(21)
0.18
(23)
0.23
(26)
0.29
FILTER SIZE
BOTTOM RETURN
14 x 25 x 3/4 (356 x 635 x 19)
16 x 25 x 3/4 (406 x 635 x 19)
20 x 25 x 3/4 (508 x 635 x 19)
24 x 25 x 3/4 (610 x 635 x 19)
PLENUM OPENING
A
12-11/16
(322)
16
(406)
19-1/2
(495)
23
(584)
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)
-
9,
Table 10
for a comparison of Pressure Drop (initial/clean resistance to airflow)
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)
-
-
-
-
-
-
21
FILTER TYPE
Washable
Washable
Washable
Washable
FLOOR OPENING
B
C
21-5/8
13-5/16
(549)
(338)
21-5/8
16-5/8
(549)
(422)
21-5/8
20-1/8
(549)
(511)
21-1/8
23-5/8
(537)
(600)
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)
(2-in. / 5 cm)
0.18
(47)
0.12
0.30
(75)
0.21
-
-
0.31
-
-
-
-
-
-
-
-
-
*
D
22-1/4
(565)
22-1/4
(565)
22-1/4
(565)
22-1/4
(565)
(2-in. / 5 cm)
(34)
(49)
(67)
-
-
-
-
-
-
-
-
(2-in. / 5 cm)
(37)
(49)
(63)
(79)
-
-
-
-
-
-
-
-
(31)
(52)
(78)
-
-
-
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