61
Performance certified is for installation type B: Free inlet, Ducted outlet. Power rating (Bhp) does not include transmission losses. Performance ratings do not include the
effects of appurtenances (accessories). The sound power level ratings shown are in decibels, referred to 10-12 watts, calculated per AMCA Standard 301. Values shown
are for inlet LwiA sound power levels and inlet hemispherical sone levels for installation type B: Free inlet, Ducted outlet, calculated per AMCA Standard 301. The AMCA
Certified Ratings Seal applies to air performance and LwiA values only.
SWB-349-AF - Belt Drive
Series 300
Wheel Diameter = 49
(1245)
Shaft Diameter = 2
7
⁄
16
(62)
Outlet Area = 13.8 ft
2
(1.28 m
2
)
^Approximate Unit Weight = 2298 lb.
(1045 kg)
All dimensions in inches
(millimeters)
For additional discharge positions see page 13
^Weight shown includes largest cataloged Open Drip Proof motor and weatherhood
Maximum BHP at a given RPM = (RPM/248)
3
(Maximum KW at a given RPM = (RPM/273)
3
)
Maximum RPM = 780
Tip Speed (ft/min.) = RPM x 12.83
(Tip Speed (m/s) = RPM x 0.0652)
Maximum Motor Frame Size = 324T
108
5
⁄
16
(2751)
36
3
⁄
4
(933)
58
3
⁄
8
(1483)
3
1
⁄
2
(89)
51
5
⁄
16
(1303)
57
(1448)
51
11
⁄
16
(1313)
80
5
⁄
16
(2040)
86
1
⁄
8
(2188)
54
1
⁄
2
(1384)
73
13
⁄
16
(1875)
78
1
⁄
2
(
1994)
38
3
⁄
16
(970)
38
3
⁄
4
(984)
55
(1397)
35
3
⁄
16
(894)
4
11
⁄
16
(119)
CFM
OV
Static Pressure in Inches wg
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
20000 1449
RPM
365
413
457
499
537
BHP
2.93
4.56
6.27
7.99
9.74
Sones / LwiA 12.4 / 73
13.7 / 75
15.5 / 77
17.5 / 79
18.9 / 80
22000 1594
RPM
391
437
478
517
555
589
BHP
3.54
5.31
7.13
9.06
10.9
12.9
Sones / LwiA 13.7 / 75
15.2 / 76
17.1 / 78
18.8 / 80
20 / 81
21 / 82
24000 1739
RPM
419
461
501
537
572
607
639
BHP
4.24
6.18
8.11
10.2
12.3
14.3
16.4
Sones / LwiA 15.6 / 77
17 / 78
18.9 / 80
20 / 81
21 / 82
23 / 83
24 / 84
26000 1884
RPM
448
486
524
559
592
624
656
686
714
BHP
5.04
7.10
9.20
11.4
13.6
15.9
18.1
20.4
22.7
Sones / LwiA 17.7 / 79
19.1 / 80
20 / 81
22 / 82
23 / 83
24 / 84
26 / 85
27 / 85
27 / 86
28000 2028
RPM
477
512
547
581
613
644
673
703
731
757
BHP
5.96
8.14
10.4
12.7
15.1
17.5
19.9
22.3
24.7
27.2
Sones / LwiA
20 / 81
21 / 82
22 / 82
24 / 83
25 / 84
26 / 85
28 / 86
28 / 86
28 / 87
29 / 87
30000 2173
RPM
506
539
572
604
635
665
693
721
748
775
BHP
7.00
9.30
11.8
14.2
16.6
19.2
21.8
24.4
27.0
29.6
Sones / LwiA
23 / 83
23 / 83
24 / 84
26 / 85
27 / 86
29 / 87
29 / 87
29 / 87
30 / 87
30 / 88
32000 2318
RPM
536
565
597
628
658
686
714
740
766
BHP
8.17
10.6
13.2
15.8
18.3
21.0
23.8
26.6
29.3
Sones / LwiA
25 / 85
26 / 85
27 / 86
28 / 86
30 / 87
30 / 87
30 / 88
31 / 88
31 / 88
34000 2463
RPM
566
594
623
652
681
709
735
761
BHP
9.48
12.0
14.7
17.5
20.2
23.0
25.9
28.8
Sones / LwiA
27 / 86
28 / 87
29 / 87
31 / 88
32 / 88
32 / 88
32 / 89
32 / 89
36000 2608
RPM
596
623
650
678
705
732
757
BHP
10.9
13.6
16.4
19.3
22.3
25.2
28.1
Sones / LwiA
30 / 88
31 / 88
32 / 89
33 / 89
33 / 89
33 / 89
33 / 89
38000 2753
RPM
626
652
676
703
729
755
BHP
12.5
15.4
18.3
21.3
24.5
27.5
Sones / LwiA
33 / 89
34 / 90
35 / 90
35 / 90
34 / 90
34 / 90
40000 2898
RPM
656
681
704
730
754
779
BHP
14.3
17.3
20.3
23.5
26.7
30.0
Sones / LwiA
36 / 91
37 / 91
36 / 91
36 / 91
36 / 91
36 / 91
Static Pr
essur
e (in. wg)
Volume (cfm X 1000)
Volume (m
3
/hr x 1000)
Static Pr
essur
e (Pa x 100)
D
o
no
t s
el
ec
t
to
t
h
e
le
ft
o
f
th
is
s
y
s
te
m
c
u
rv
e
0
20
40
60
80
0
2
4
6
8
10
12
14
0
10
20
30
40
50
0
1
2
3
4
5
6
424
424
485
485
534
534
612
612
673
673
725
725
780
780
40
40
30
30
25
25
20
20
15
15
10
10
7
½
7½
5
5
RPM
HP
Density 0.075 lb/ft
3
SWB-349-AF
