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Table 21 — Fan Performance — 48/50P100 Units with Forward-Curved Fan
AIRFLOW
0.2
(cfm)
rpm
bhp
20,000
275
5.83
22,000
298
7.53
24,000
320
9.55
26,000
343
11.91
28,000
367
14.65
30,000
390
17.78
32,000
414
21.36
34,000
437
25.39
36,000
461
29.92
38,000
485
34.96
40,000
509
40.54
AIRFLOW
1.8
(cfm)
rpm
bhp
20,000
443
14.38
22,000
455
16.70
24,000
470
19.38
26,000
485
22.43
28,000
501
25.89
30,000
518
29.76
32,000
536
34.11
34,000
555
38.92
36,000
574
44.25
38,000
593
50.10
40,000
613
56.52
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
AIRFLOW
3.4
(cfm)
rpm
bhp
20,000
574
24.68
22,000
581
27.57
24,000
590
30.80
26,000
600
34.39
28,000
612
38.38
30,000
624
42.81
32,000
638
47.72
34,000
653
53.12
36,000
669
59.06
38,000
—
—
40,000
—
—
NOTE(S):
a. If calculating static pressure for a 48 Series unit, be sure to add gas heat pressure drop from Component Pressure Drop table.
b. Fan performance is based on wet coils and clean 2 in. filters.
c. For return fan and high-capacity power exhaust units, add component pressure drop for economizer. Do not add component pressure drop for power exhaust.
d. See Component Pressure Drop data table before using Fan Performance tables.
e. To convert bhp to kW, use the formula:
Kilowatts = bhp x 0.746
Motor efficiency
See Physical Data table for motor efficiency.
LEGEND
48/50P3,P5,P7,P9 units only.
bhp
— Brake Horsepower
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
0.4
0.6
rpm
bhp
rpm
bhp
301
6.82
324
7.81
321
8.62
343
9.70
342
10.75
363
11.93
364
13.22
384
14.50
386
16.06
405
17.45
408
19.31
426
20.80
431
22.99
448
24.59
454
27.13
470
28.84
477
31.77
492
33.58
500
36.91
514
38.85
523
42.61
537
44.65
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
2.0
2.2
rpm
bhp
rpm
bhp
460
15.58
478
16.82
472
17.98
489
19.28
486
20.72
501
22.08
500
23.83
515
25.27
516
27.36
530
28.86
533
31.32
546
32.89
550
35.73
563
37.38
568
40.63
581
42.36
586
46.03
599
47.85
605
51.98
617
53.87
625
58.49
636
60.48
3.6
3.8
rpm
bhp
rpm
bhp
589
26.06
604
27.45
596
29.04
610
30.51
604
32.33
617
33.88
613
35.99
627
37.61
624
40.05
637
41.74
637
44.54
649
46.29
650
49.51
662
51.33
665
54.98
676
56.87
680
60.98
—
—
—
—
—
—
—
—
—
—
0.8
1.0
rpm
bhp
rpm
bhp
346
8.82
366
9.86
364
10.80
383
11.92
383
13.11
401
14.31
402
15.78
420
17.07
422
18.83
439
20.20
443
22.28
459
23.75
464
26.17
479
27.75
485
30.53
500
32.20
506
35.38
521
37.16
528
40.74
542
42.63
550
46.66
563
48.64
2.4
2.6
rpm
bhp
rpm
bhp
495
18.07
511
19.35
505
20.60
521
21.96
517
23.48
532
24.89
530
26.73
544
28.22
544
30.38
558
31.94
560
34.48
573
36.10
576
39.04
589
40.73
593
44.10
605
45.87
611
49.67
623
51.51
629
55.77
640
57.71
648
62.46
659
64.47
4.0
rpm
bhp
618
28.86
624
31.99
631
35.44
640
39.24
650
43.44
661
48.06
674
53.17
—
—
—
—
—
—
—
—
27
a,b,c,d,e
1.2
1.4
rpm
bhp
rpm
bhp
386
10.94
406
12.05
402
13.07
420
14.25
419
15.54
436
16.79
437
18.37
453
19.70
455
21.59
471
23.00
474
25.24
489
26.73
494
29.32
508
30.90
514
33.87
528
35.55
534
38.93
548
40.69
555
44.50
568
46.36
576
50.62
589
52.59
2.8
3.0
rpm
bhp
rpm
bhp
527
20.65
543
21.98
536
23.33
551
24.72
547
26.34
561
27.80
559
29.72
573
31.26
572
33.51
585
35.11
586
37.74
599
39.41
601
42.45
614
44.18
618
47.64
630
49.45
634
53.37
646
55.25
652
59.63
663
61.59
—
—
—
—
1.6
rpm
bhp
425
13.20
438
15.46
453
18.07
469
21.05
486
24.43
504
28.24
523
32.49
542
37.23
561
42.47
581
48.23
601
54.56
3.2
rpm
bhp
559
23.32
566
26.14
576
29.29
586
32.81
599
36.74
612
41.11
626
45.94
641
51.27
657
57.14
674
63.54
—
—
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