Page 14 • Central Blower Restaurant Exhaust Fan Catalog
24-BI
24.50-INCH WHEEL DIAMETER
OUTLET AREA (SQ. FT.) 3.490
TIP SPEED (FPM) = 6.41 x RPM
MAX. BHP = 2.420 x (RPM/1000)
3
3/4”
RPM BHP
5/8”
RPM BHP
1/2”
RPM BHP
3/8”
RPM BHP
1/4”
RPM BHP
O.V. FPM
VOLUME
CFM
1.0”
RPM BHP
1-3/4”
RPM BHP
1-1/2”
RPM BHP
1-1/4”
RPM BHP
SP, in. WG
2800 802 428 0.18 476 0.25 522 0.32 565 0.40 606 0.448 680 0.65 748 0.83 811 1.02 872 1.22 929 1.43 1034 1.86 1130 2.30 1217 2.77
3200 917 457 0.23 504 0.31 547 0.38 587 0.46 626 0.55 698 0.74 763 0.93 824 1.13 881 1.34 936 1.56 1040 2.02 1135 2.51 1222 3.01
3600 1032 491 0.28 534 0.37 575 0.45 613 0.54 649 0.63 718 0.83 781 1.03 840 1.25 895 1.47 948 1.70 1047 2.18 1141 2.71 1227 3.25
4000 1146 525 0.35 567 0.44 605 0.53 641 0.63 676 0.73 740 0.93 801 1.15 859 1.38 912 1.62 963 1.86 1059 2.37 1148 2.90 1234 3.47
4400 1261 561 0.43 600 0.52 637 0.62 670 0.72 703 0.83 766 1.05 824 1.27 879 1.51 931 1.77 981 2.03 1074 2.56 1161 3.12 1242 3.70
4800 1375 598 0.51 634 0.62 670 0.72 702 0.83 733 0.94 792 1.18 848 1.42 901 1.67 952 1.93 1001 2.20 1091 2.77 1176 3.36 1256 3.97
5200 1490 636 0.62 670 0.72 703 0.84 735 0.95 765 1.07 821 1.32 875 1.58 925 1.84 974 2.11 1021 2.39 1110 2.98 1193 3.60 1270 4.24
5600 1605 674 0.73 707 0.85 738 0.97 768 1.09 797 1.22 851 1.48 902 1.75 952 2.03 998 2.30 1044 2.59 1130 3.21 1212 3.86 1288 4.53
6000 1719 712 0.86 744 0.99 774 1.11 802 1.24 830 1.38 883 1.65 931 1.93 979 2.23 1025 2.53 1068 2.82 1152 3.46 1231 4.13 1306 4.83
7000 2006 811 1.27 839 1.41 866 1.56 892 1.70 916 1.85 964 2.16 1010 2.48 1053 2.80 1095 3.14 1136 3.48 1213 4.18 1286 4.88 1358 5.64
8000 2292 912 1.79 936 1.95 960 2.12 984 2.29 1007 2.45 1051 2.79 1093 3.14 1134 3.51 1172 3.87 1209 4.25 1282 5.02 1351 5.82 1417 6.60
9000 2579 1014 2.44 1036 2.63 1057 2.82 1079 3.01 1101 3.19 1141 3.57 1179 3.95 1217 4.34 1254 4.75 1290 5.16 1356 5.99 1421 6.86 1484 7.76
10000 2865 1117 3.25 1137 3.46 1157 3.67 1176 3.88 1196 4.09 1234 4.50 1270 4.92 1305 5.35 1338 5.77 1372 6.22 1437 7..13 1497 8.06 1555 9.01
11000 3152 1221 4.23 1239 4.46 1258 4.69 1275 4.92 1295 5.16 1328 5.61 1363 6.07 1396 6.53 1427 6.99 1458 7.46 1519 8.44 1578 9.44 1633 10.5
12000 3438 1325 5.40 1342 5.65 1359 5.90 1376 6.15 1392 6.41 1424 6.91 1457 7.41 1488 7.90 1518 8.41 1547 8.91 1603 9.93 1660 11.0 1714 12.1
3-1/2”
RPM BHP
3.0”
RPM BHP
2-1/2”
RPM BHP
2.0”
RPM BHP
Performance shown is for Type B - Free Inlet, Ducted Outlet.
Power rating (BHP) does not include drive losses. Add 10% for drive loss.
Performance ratings do not include the effects of appurtenances in the airstream.
27-BI
27.00 -INCH WHEEL DIAMETER
OUTLET AREA (SQ. FT.) 4.260
TIP SPEED (FPM) = 7.07 x RPM
MAX. BHP = 3.982 x (RPM/1000)
3
3/4”
RPM BHP
5/8”
RPM BHP
1/2”
RPM BHP
3/8”
RPM BHP
1/4”
RPM BHP
O.V. FPM
VOLUME
CFM
1.0”
RPM BHP
1-3/4”
RPM BHP
1-1/2”
RPM BHP
1-1/4”
RPM BHP
SP, in. WG
3400 798 390 0.21 430 0.630 467 0.34 502 0.45 538 0.55 604 0.79 669 0.99 730 1.22 785 1.45 838 1.69 930 2.20 1017 2.78 1095 3.33
3800 892 414 0.27 452 0.36 488 0.42 520 0.52 552 0.63 615 0.87 680 1.10 738 1.32 790 1.58 840 1.82 935 2.33 1020 2.94 1098 3.55
4200 985 442 0.34 482 0.44 512 0.52 545 0.60 572 0.73 630 0.95 691 1.20 145 1.43 795 1.72 845 1.95 940 2.50 1024 3.14 1100 3.78
4600 1080 470 0.40 509 0.50 538 0.61 568 0.72 593 0.83 648 1.05 706 1.30 758 1.56 802 1.85 855 2.10 942 2.66 1029 3.33 1105 4.00
5000 1174 504 0.44 540 0.58 566 0.70 592 0.83 622 0.96 667 1.17 722 1.42 771 1.70 812 2.00 866 2.28 950 2.84 1030 3.56 1110 4.22
5400 1268 530 0.54 568 0.67 593 0.82 617 0.95 648 1.08 688 1.30 740 1.56 786 1.84 827 2.16 880 2.30 958 3.04 1038 3.75 1115 4.49
5800 1362 560 0.65 597 0.80 620 0.94 645 1.09 673 1.22 710 1.42 760 1.56 804 2.00 842 2.31 892 2.60 967 3.23 1048 3.96 1122 4.70
6200 1455 592 0.77 626 0.90 648 1.08 674 1.22 702 1.37 738 1.60 780 1.88 822 2.18 863 2.50 910 2.81 980 3.42 1059 4.20 1132 4.93
6600 1549 623 0.92 655 1.05 675 1.22 702 1.38 728 1.52 777 1.76 803 2.06 843 2.38 886 2.69 928 3.03 996 3.68 1082 4.47 1141 5.23
7000 1643 658 1.07 687 1.20 704 1.36 732 1.52 755 1.68 793 1.93 831 2.25 868 2.59 908 2.90 949 3.24 1014 3.95 1088 4.72 1152 5.51
8000 1878 738 1.50 760 1.62 779 1.78 803 1.92 822 2.14 860 2.45 900 2.82 936 3.19 969 3.55 1006 3.88 1069 4.68 1130 5.48 1194 6.36
9000 2113 816 2.00 834 2.14 854 2.31 876 2.45 890 2.73 929 3.12 970 3.41 1002 3.96 1032 4.35 1065 4.67 1127 5.60 1182 6.42 1240 7.28
10000 2347 894 2.63 910 2.80 929 2.97 948 3.16 967 3.48 1000 3.90 1039 4.33 1070 4.88 1098 5.30 1129 5.95 1189 6.83 1240 7.70 1293 8.40
11000 2582 972 3.41 988 3.60 1005 3.80 1022 3.98 1040 4.30 1074 4.81 1109 5.24 1138 5.85 1166 6.35 1193 6.80 1252 7.87 1302 8.85 1350 9.73
12000 2817 1052 4.40 1067 4.52 1082 4.70 1102 4.93 1121 5.28 1150 5.85 1178 6.30 1213 6.88 1238 7.50 1264 8.00 1320 9.05 1365 10.3 1412 11.2
13000 3052 1132 5.45 1145 5.60 1160 5.74 1180 6.00 1198 6.42 1229 7.02 1253 7.52 1282 8.15 1305 8.75 1332 9.25 1390 10.5 1430 11.8 1477 12.8
14000 3286 1210 6.55 1222 6.73 1238 6.95 1256 7.29 1275 7.66 1307 8.35 1330 8.90 1355 9.58 1382 10.3 1405 10.8 1460 12.1 1495 13.5 1540 14.6
3-1/2”
RPM BHP
3.0”
RPM BHP
2-1/2”
RPM BHP
2.0”
RPM BHP
91Z0
Central Type Bl
Centrifugal Blowers
are available as
U.L. Listed for
Grease Removal
(UL762)
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