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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 Pressure (in. wg)
Volume (cfm X 1000)
Volume (m
3
/hr x 1000)
Static Pressure (Pa x 100)
D
o
n
o
t
s
e
l
e
c
t
t
o
t
h
e
l
e
f
t
o
f
t
h
i
s
s
y
s
t
e
m
c
u
r
v
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
SWB-349-AF
RPM
HP
Density 0.075 lb/ft
3
SWB-349-AF