17
Table 12 — Fan Performance — 48/50N 75 Nominal Ton Units High-Static Return Fan Data
AIRFLOW
(cfm)
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
0.2 0.4 0.6 0.8 1.0
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
15,000
332 1.50 363 1.98 392 2.50 420 3.04 447 3.61
18,000
387 2.36 413 2.91 438 3.50 462 4.11 486 4.75
21,000
443 3.52 466 4.15 488 4.81 509 5.50 530 6.21
24,000
500 5.03 520 5.74 540 6.48 559 7.24 578 8.03
27,000
558 6.96 576 7.75 593 8.56 611 9.40 628 10.26
30,000
616 9.34 633 10.22 648 11.11 664 12.02 679 12.95
33,000
675 12.23 690 13.19 704 14.16 718 15.15 733 16.16
36,000
734 15.69 747 16.72 761 17.77 774 18.85 787 19.94
39,000
793 19.75 805 20.87 818 22.00 830 23.16 842 24.32
42,000
852 24.48 864 25.68 875 26.89 886 28.13 898 29.37
45,000
911 29.92 922 31.21 933 32.50 943 33.81 954 35.14
48,000
971 36.12 981 37.48 991 38.87 1001 40.25 1011 41.66
51,000
1030 43.14 1040 44.59 1049 46.06 1058 47.52 1068 49.00
52,500
1060 46.98 1069 48.46 1078 49.97 1087 51.48 1097 53.00
AIRFLOW
(cfm)
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
1.2 1.4 1.6 1.8 2.0
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
15,000
473 4.20 499 4.82 524 5.45 548 6.11 571 6.78
18,000
509 5.41 532 6.10 554 6.80 576 7.53 597 8.27
21,000
551 6.94 571 7.69 591 8.47 610 9.26 630 10.07
24,000
596 8.83 615 9.66 632 10.50 650 11.36 668 12.24
27,000
644 11.13 661 12.03 677 12.95 694 13.88 710 14.83
30,000
695 13.91 710 14.87 725 15.86 740 16.86 754 17.88
33,000
747 17.19 761 18.23 774 19.29 788 20.37 802 21.46
36,000
800 21.04 813 22.16 826 23.30 838 24.45 851 25.61
39,000
854 25.50 866 26.70 878 27.91 890 29.14 902 30.37
42,000
909 30.63 920 31.91 931 33.19 942 34.49 953 35.81
45,000
965 36.47 975 37.83 986 39.19 996 40.57 1006 41.96
48,000
1021 43.09 1031 44.52 1040 45.95 1050 47.41 1060 48.88
51,000
1077 50.50 1087 52.02 1096 53.54 1105 55.07 1114 56.62
52,500
1106 54.55 1115 56.09 1124 57.66 1133 59.23 1142 60.81
AIRFLOW
(cfm)
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
2.2 2.4 2.6 2.8 3.0
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
15,000
594 7.46 616 8.16 638 8.86 660 9.59 680 10.32
18,000
618 9.02 638 9.79 658 10.58 678 11.38 697 12.20
21,000
649 10.90 667 11.74 685 12.60 703 13.47 721 14.35
24,000
685 13.13 702 14.05 719 14.97 735 15.92 751 16.87
27,000
725 15.79 741 16.77 756 17.77 772 18.78 787 19.81
30,000
769 18.92 783 19.97 798 21.03 812 22.12 826 23.21
33,000
815 22.57 829 23.69 842 24.83 855 25.98 868 27.14
36,000
863 26.79 876 27.98 888 29.19 900 30.41 913 31.65
39,000
913 31.62 925 32.89 936 34.18 948 35.46 959 36.78
42,000
964 37.14 975 38.47 986 39.83 997 41.20 1008 42.58
45,000
1017 43.37 1027 44.78 1037 46.20 1047 47.65 1057 49.10
48,000
1070 50.36 1079 51.86 1089 53.35 1099 54.87 1108 56.41
51,000
1124 58.18 1133 59.74 1142 61.33 1151 62.91 1160 64.52
52,500
1151 62.42 1160 64.02 1169 65.64 1177 67.26 1186 68.90
AIRFLOW
(cfm)
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
3.2 3.4 3.6 3.8 4.0
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
15,000
701 11.06 721 11.82 741 12.58 760 13.35 779 14.13
18,000
716 13.02 734 13.86 753 14.70 771 15.56 789 16.43
21,000
739 15.25 756 16.16 773 17.09 790 18.02 806 18.97
24,000
768 17.84 784 18.82 799 19.82 815 20.83 830 21.84
27,000
802 20.84 816 21.89 831 22.96 846 24.04 860 25.12
30,000
840 24.32 853 25.44 867 26.58 881 27.72 894 28.88
33,000
881 28.32 894 29.51 906 30.70 919 31.93 932 33.15
36,000
925 32.90 937 34.15 949 35.42 961 36.71 972 38.00
39,000
971 38.09 982 39.43 993 40.77 1004 42.12 1015 43.49
42,000
1018 43.96 1029 45.36 1039 46.78 1050 48.21 1060 49.64
45,000
1067 50.56 1077 52.05 1087 53.52 1097 55.02 1107 56.53
48,000
1118 57.94 1127 59.48 1137 61.05 1146 62.62 1155 64.19
51,000
1169 66.13 1178 67.75 1187 69.40 1196 71.04 1205 72.70
52,500
1195 70.55 1204 72.22 1213 73.88 1221 75.56 1230 77.26
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