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Table 17 — Fan Performance — 48/50P075 Units with Forward-Curved Fan
AIRFLOW
0.2
(cfm)
rpm
bhp
14,000
211
2.35
16,000
232
3.27
18,000
253
4.42
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
AIRFLOW
1.8
(cfm)
rpm
bhp
14,000
416
9.12
16,000
423
10.62
18,000
432
12.36
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
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
AIRFLOW
3.4
(cfm)
rpm
bhp
14,000
564
17.47
16,000
566
19.68
18,000
569
22.06
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
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
243
3.06
272
3.80
261
4.06
288
4.88
281
5.31
305
6.21
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
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
2.0
2.2
rpm
bhp
rpm
bhp
437
10.10
457
11.10
442
11.68
462
12.77
450
13.50
469
14.66
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
3.6
3.8
rpm
bhp
rpm
bhp
581
18.58
596
19.71
582
20.88
597
22.10
585
23.36
600
24.66
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
0.8
1.0
rpm
bhp
rpm
bhp
299
4.59
325
5.43
313
5.74
337
6.65
329
7.14
351
8.11
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
2.4
2.6
rpm
bhp
rpm
bhp
476
12.13
495
13.17
480
13.88
498
15.00
486
15.84
504
17.05
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
4.0
rpm
bhp
612
20.84
613
23.33
615
25.99
618
28.85
624
31.99
631
35.44
640
39.24
650
43.44
661
48.06
23
a,b,c,d,e
1.2
1.4
rpm
bhp
rpm
bhp
349
6.30
372
7.21
360
7.59
381
8.57
372
912
393
10.17
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
2.8
3.0
rpm
bhp
rpm
bhp
513
14.22
531
15.29
516
16.15
533
17.31
521
18.27
537
19.53
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
1.6
rpm
bhp
395
8.15
402
9.58
413
11.25
425
13.20
438
15.46
453
18.07
469
21.05
486
24.43
504
28.24
3.2
rpm
bhp
548
16.38
550
18.48
553
20.78
559
23.32
566
26.14
576
29.29
586
32.81
599
36.74
612
41.11
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