CENTRAL RE Series User manual

Rooftop Grease Design and Installation Criteria
Introduction:
Due to high potential of spillage and runoff from rooftop ventilation and exhaust fans and the Fats, Oils and Grease
(F.O.G.) they produce, The Irvine Company, Retail Properties group has created the following criteria. This
criterion has been created to significantly reduce the exposure of F.O.G. on the Landlord’s roofing systems and
exposure to runoff into the rooftop storm drain systems. F.O.G. is acidic in nature and causes rapid deterioration of
roofing materials. Additionally, runoff of F.O.G. into the storm drain systems puts both the Tenant and Landlord at
significant risk with Governmental agencies that monitor water quality issues.
Equipment:
Rooftop equipment designed by the Tenant shall conform to all regulatory and statutory requirements set forth by
all municipal reviewing agencies. In addition, the following requirements shall also be adhered to in the design of
the Tenant’s rooftop exhaust and ventilation systems:
1. Rooftop exhaust systems shall be designed to accommodate all code requirements, but shall not be over
designed as to discharge extraordinary amounts of F.O.G. onto the surrounding roof system. Exhaust
velocities shall be maintained to manufacturer specifications to adequately capture all discharge materials.
2. All rooftop equipment shall provide rainproof capture and collection systems for any and all F.O.G.
discharge.
3. Rooftop exhaust and ventilation equipment shall be installed in compliance with Landlord’s rooftop
equipment installation details set forth elsewhere in this criterion.
Although, the design and engineering of rooftop exhaust and ventilation equipment is regulated through municipal
code, The Irvine Company, Retail Properties has found the following companies to provide superior grease
containment and capture to other manufacturers and require that Tenants utilize one of these manufacturers.
xSupreme Fan Products 435 East Lincoln Street
Banning, California 92220
Phone: [phone]
Fax: [phone]
xCentral Blower Company 211 S. 7th Ave.
City of Industry, Calif. 91746
Phone: [phone]
Fax: [phone]
www.centralblower.com
Alternative manufacturers may be utilized only if the equipment specifications are equal to or exceed those provided
by the aforementioned manufacturers and approved in writing by Landlord. The Landlord does not warrant, nor
assumes any liability for the products or performance of the aforementioned companies.

Maintenance:
Tenants are required to maintain all grease producing rooftop equipment to eliminate the possibility of runoff of
F.O.G. onto Landlord’s roof systems and into roof drains. Maintenance shall be performed by a Landlord approved
company licensed to inspect and maintain exhaust systems and shall occur a minimum of 6 times annually or more
frequently as required by governing agencies and shall consist of the entire system from the rooftop exhaust and
ventilation units all shafts leading down to the source equipment and any and all filtration systems associated with
this equipment. Landlord may, at its discretion, provide rooftop exhaust maintenance services as a Common Area
Expense and Tenant shall be responsible for its pro-rata share.
Landlord’s Plan Review:
During the Tenants design and engineering process, all mechanical drawings showing any and all rooftop exhaust
and ventilation equipment shall be submitted to Landlord for review and comment through Landlord’s proprietary
mechanical consultant. Tenant shall comply with all of Landlord’s comments and incorporate comments into
Tenant’s drawings. Tenant shall pay all costs associated with Landlord’s review of tenant’s plans estimated as
follows:
xQuick Serve Restaurant $500 per review.
xFull Service Restaurant $850 per review.
xField Inspection reports $125 per hour with a 2-hour minimum.

CENTRAL BLOWER COMPANY
CENTRAL BLOWER COMPANY
211 S. 7th Ave. • City of Industry, CA 91746
[phone] Fax [phone]
www.centralblower.com
CATALOG • REF - 04
FEBRUARY, 2004

Page 2 • Central Blower Restaurant Exhaust Fan Catalog
Series RE
Scoop with Grease Trough
▲ Sealed to blower housing with high temperature
silicone foam
▲ Grease trough easily removed for draining
▲ Drain on grease trough allows rain water to
run off while grease stays inside
▲ Can be extended up or out for
special applications
▲ Scoop can be removed for
extended discharge
Blower Housing
▲ Heavy gauge zinc coated steel
▲ U.L. recognized powder coating
▲ Housing continuously welded
top and bottom
Tilt Open Top
Cover Assembly
▲ Heavy duty self cleaning
backward inclined wheel
▲ Drives stay in adjustment
when open for service
▲ Sealed to blower housing with
high temperature silicone foam
▲ Heavy duty relubricatable
bearings
▲ Latch locks cover open
when cleaning
▲ Spare belt stored under
weather cover
Safety Disconnect
Switch
▲Standard
(specify H.P., voltage and phase)
▲ Weather proof enclosure
▲ Factory wired to motor
91Z0
Central Type RE
Centrifugal Blowers
are available as
U.L. Listed for
Grease Removal
(UL762)
Central Blower Co. certifies that the
Belt Drive Blowers shown on pages
2 through 15 are licensed to bear
the AMCA Seal. The ratings shown
are based on tests and procedures
performed in accordance with
AMCA Publication 211 and comply
with the requirements of AMCA
Certified Ratings Program.

Central Blower Restaurant Exhaust Fan Catalog • Page 3
Series RE Features
Optional
Funnel Fitting
▲ All welded
▲ Specify duct size
when ordering
▲ Side inlet fitting
available. See
factory for price.
Standard
Weather Cover
▲ Heavy gauge zinc
coated steel
▲ Painted with UL
recognized paint
▲ Easily removed with
simple hand tools
Hinge Kit
with Prop Rod
▲ Cannot close without
operator release
Vented Curb
▲Galvanized Steel
▲Welded
▲Proper Height to place
discharge 40” from roof
▲Wood nailer for roofing
▲One pc. curb allows roofing
and duct installation before
blower arrives
Motors
▲ Quality US made
▲ Energy efficient
▲ Sized to fit CFM
requirements
▲ Mounted outside away
from heat & grease
Drives
▲ Highest quality
▲ Cast iron for long life
▲ Variable pitch motor pulley
allows speed adjustment
in the field
Bearings
▲ Highest quality
▲ HD cast housing with lube
fitting for maintenance
▲ Ground and Polished
shafts with keys

Page 4 • Central Blower Restaurant Exhaust Fan Catalog
Restaurant Exhaust Fans
Models RE12, RE15, RE18, RE22 and RE24
RE 12-24
Model A B C D E F G H
RE-12 13 1/8 13 1/4 49 1/8 24 1/2 20 9 3/4 30 1/4 29 3/4
RE-15 15 16 3/4 53 7/8 24 1/2 22 12 1/8 30 1/4 29 3/4
RE-18 19 5/8 19 1/4 53 39 7/8 25 14 1/2 26 1/2 26
RE-22 23 13/16 23 1/2 58 1/2 39 7/8 28 17 13/16 26 1/2 26
RE-24 26 1/4 25 7/8 57 1/4 47 30 19 1/2 21 1/2 21

Central Blower Restaurant Exhaust Fan Catalog • Page 5
Restaurant Exhaust Fans
Models RE12, RE15, RE18, RE22 and RE24
Model A B C D E
RE-12 24 1/2 21 1/2 29 3/4 17 1/2 1 1/2
RE-15 24 1/2 21 1/2 29 3/4 17 1/2 1 1/2
RE-18 39 7/8 36 7/8 26 33 1 1/2
RE-22 39 7/8 36 7/8 26 33 1 1/2
RE-24 47 43 21 40 2

Page 6 • Central Blower Restaurant Exhaust Fan Catalog
RE-12 12.25” Wheel Diameter
VOLUME
CFM
SP, in. WG
3.0”
RPM BHP
Outlet
Velocity
FPM 1/8”
RPM BHP
1/4”
RPM BHP
3/8”
RPM BHP
1/2”
RPM BHP
3/4”
RPM BHP
1.0”
RPM BHP
1-1/4”
RPM BHP
1-1/2”
RPM BHP
2.0”
RPM BHP
2-1/2”
RPM BHP
RE-15 15.00” Wheel Diameter
VOLUME
CFM
SP, in. WG
800 633 624 0.05 701 0.07 798 0.09 870 0.12 986 0.17 1110 0.23 1228 0.31 1334 0.38 1522 0.54 1689 0.70 1841 0.87
1000 792 739 0.08 817 0.10 891 0.13 954 0.16 1075 0.22 1171 0.28 1263 0.35 1362 0.43 1551 0.62 1717 0.81 1868 1.00
1200 950 855 0.12 921 0.15 988 0.18 1052 0.22 1157 0.28 1260 0.36 1345 0.43 1422 0.51 1581 0.68 1747 0.90 1897 1.12
1400 1108 973 0.18 1036 0.21 1090 0.25 1149 0.29 1254 0.37 1341 0.44 1434 0.54 1513 0.62 1650 0.79 1781 0.98 1925 1.22
1600 1267 1095 0.24 1152 0.29 1202 0.33 1250 0.37 1351 0.47 1440 0.56 1517 0.64 1596 0.74 1740 0.94 1859 1.14 1973 1.34
1800 1425 1218 0.32 1270 0.38 1318 0.44 1361 0.48 1449 0.58 1537 0.69 1616 0.79 1685 0.88 1825 1.10 1950 1.33 2058 1.55
2000 1584 1342 0.44 1387 0.51 1435 0.50 1478 0.61 1552 0.71 1634 0.84 1712 0.95 1783 1.05 1908 1.28 2036 1.53 2149 1.79
2200 1742 1465 0.60 1510 0.65 1552 0.70 1593 0.76 1664 0.87 1734 0.99 1810 1.12 1880 1.25 2006 1.50 2117 1.74 2233 2.02
2400 1900 1589 0.77 1633 0.79 1669 0.89 1710 0.93 1780 1.07 1842 1.18 1908 1.32 1978 1.46 2103 1.75 2213 2.01 2314 2.27
3.0”
RPM BHP
Outlet
Velocity
FPM 1/8”
RPM BHP
1/4”
RPM BHP
3/8”
RPM BHP
1/2”
RPM BHP
3/4”
RPM BHP
1.0”
RPM BHP
1-1/4”
RPM BHP
1-1/2”
RPM BHP
2.0”
RPM BHP
2-1/2”
RPM BHP
RE-18 18.25” Wheel Diameter
VOLUME
CFM
SP, in. WG
1400 708 591 0.11 658 0.14 715 0.17 768 0.22 868 0.30 958 0.40 1043 0.50 1123 0.62 1277 0.88 1415 1.15 1539 1.41
1600 810 654 0.14 717 0.17 773 0.22 820 0.26 913 0.36 998 0.46 1077 0.56 1152 0.68 1295 0.95 1430 1.24 1556 1.55
1800 911 718 0.17 780 0.24 830 0.27 879 0.33 962 0.41 1044 0.53 1119 0.64 1189 0.76 1323 1.03 1449 1.33 1570 1.66
2000 1012 783 0.22 842 0.30 889 0.32 936 0.39 1017 0.49 1091 0.60 1163 0.73 1231 0.85 1358 1.13 1477 1.43 1591 1.77
2200 1113 849 0.29 905 0.37 952 0.43 995 0.46 1074 0.59 1143 0.69 1211 0.82 1277 0.96 1398 1.25 1511 1.55 1620 1.89
2400 1214 916 0.35 969 0.44 1016 0.53 1055 0.57 1132 0.69 1200 0.82 1262 0.93 1323 1.07 1441 1.37 1550 1.69 1654 2.04
2600 1316 983 0.45 1032 0.51 1079 0.63 1119 0.70 1190 0.79 1258 0.95 1318 1.08 1375 1.20 1488 1.52 1593 1.85 1692 2.19
2800 1417 1051 0.59 1097 0.61 1142 0.73 1182 0.84 1248 0.90 1316 1.09 1376 1.25 1430 1.36 1536 1.67 1639 2.03 1735 2.39
3000 1518 1121 0.73 1162 0.75 1205 0.84 1245 0.97 1311 1.11 1374 1.22 1433 1.42 1487 1.56 1587 1.85 1686 2.21 1780 2.59
3200 1619 1190 0.86 1230 0.87 1269 0.94 1309 1.11 1375 1.31 1432 1.35 1491 1.58 1545 1.77 1641 2.06 1735 2.41 1827 2.81
3400 1720 1259 0.99 1296 1.00 1333 1.08 1371 1.25 1437 1.51 1495 1.62 1549 1.75 1603 1.97 1699 2.33 1787 2.63 1873 3.03
3600 1822 1327 1.14 1363 1.15 1400 1.28 1435 1.38 1501 1.72 1558 1.89 1607 1.92 1660 2.17 1757 2.60 1841 2.91 1925 3.30
3.0”
RPM BHP
Outlet
Velocity
FPM 1/8”
RPM BHP
1/4”
RPM BHP
3/8”
RPM BHP
1/2”
RPM BHP
3/4”
RPM BHP
1.0”
RPM BHP
1-1/4”
RPM BHP
1-1/2”
RPM BHP
2.0”
RPM BHP
2-1/2”
RPM BHP
500 563 726 0.03 840 0.04 939 0.06 1034 .008 1210 0.13 1372 0.18 1518 0.23 1650 0.29 1887 0.40 2100 0.56 2296 0.68
600 675 824 0.04 928 0.06 1019 0.08 1102 0.10 1259 0.14 1405 0.20 1548 0.26 1676 0.32 1912 0.45 2120 0.59 2306 0.74
700 788 926 0.06 1021 0.08 1104 0.10 1182 0.12 1323 0.17 1459 0.22 1581 0.28 1710 0.35 1938 0.50 2144 0.65 2332 0.80
800 900 1031 0.08 1116 0.10 1196 0.13 1268 0.15 1402 0.20 1520 0.26 1641 0.31 1752 0.38 1971 0.54 2171 0.70 2358 0.87
900 1013 1132 0.10 1217 0.13 1289 0.16 1359 0.19 1482 0.24 1600 0.30 1703 0.36 1812 0.42 2008 0.58 2205 0.75 2388 0.94
1000 1125 1240 0.13 1321 0.17 1387 0.19 1452 0.23 1570 0.29 1681 0.35 1783 0.42 1878 0.48 2078 0.63 2243 0.81 2420 1.02
1200 1350 1463 0.22 1529 0.26 1592 0.29 1646 0.33 1758 0.40 1854 0.47 1947 0.54 2039 0.62 2205 0.78 2362 0.94 2519 1.13
1400 1575 1684 0.34 1738 0.37 1800 0.42 1852 0.46 1948 0.54 2041 0.63 2129 0.71 2208 0.79 2365 0.98 2512 1.16 2643 1.35
1600 1800 1910 0.50 1961 0.54 2005 0.57 2062 0.63 2150 0.72 2232 0.82 2316 0.92 2393 1.01 2535 1.19 2672 1.41 2805 1.62
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 include the effects of a discharge scoop in the airstream.
Consult Central Blower Co. for CFM and S.P. not listed above.
91Z0
Central Type RE
Centrifugal Blowers
are available as
U.L. Listed for
Grease Removal
(UL762)
Central Blower Co. certifies that the
Belt Drive Blowers shown on pages
2 through 15 are licensed to bear
the AMCA Seal. The ratings shown
are based on tests and procedures
performed in accordance with
AMCA Publication 211 and comply
with the requirements of AMCA
Certified Ratings Program.

Central Blower Restaurant Exhaust Fan Catalog • Page 7
RE-24 24.50” Wheel Diameter
VOLUME
CFM
2800 793 405 0.19 466 0.28 523 0.38 577 0.48 672 0.70 752 0.90 822 1.05 887 1.22 1010 1.77 1118 2.39 1212 2.98
3200 907 447 0.25 499 0.34 551 0.46 602 0.57 694 0.82 774 1.08 845 1.30 908 1.48 1023 1.85 1131 2.50 1229 3.19
3600 1020 490 0.33 537 0.43 585 0.55 629 0.67 718 0.94 796 1.22 867 1.51 931 1.78 1043 2.18 1145 2.60 1243 3.31
4000 1133 534 0.44 576 0.54 619 0.65 662 0.78 742 1.08 818 1.38 888 1.69 953 2.01 1066 2.58 1165 3.01 1256 3.42
4400 1246 580 0.61 618 0.68 657 0.78 696 0.92 769 1.21 843 1.55 910 1.88 974 2.24 1088 2.94 1188 3.50 1277 3.99
4800 1360 628 0.85 660 0.79 696 0.93 732 1.08 803 1.40 868 1.72 935 2.09 996 2.46 1110 3.24 1210 3.99 1300 4.58
5200 1473 675 1.09 705 0.99 738 1.12 770 1.16 837 1.60 898 1.93 960 2.31 1021 2.71 1132 3.53 1232 4.37 1322 5.18
5600 1586 723 1.32 749 1.18 779 1.32 810 1.49 871 1.81 931 2.18 986 2.54 1046 2.98 1153 3.82 1254 4.73 1344 5.62
6000 1700 771 1.58 794 1.42 822 1.54 852 1.73 908 2.07 965 2.45 1019 3.84 1071 3.23 1178 4.17 1275 5.10 1368 6.08
6400 1813 818 1.81 842 1.92 867 1.83 893 1.99 946 2.34 999 2.74 1053 3.17 1103 3.58 1204 4.52 1298 5.50 1388 6.52
6800 1926 866 2.06 889 2.50 911 2.11 935 2.26 986 2.68 1036 3.08 1087 3.51 1136 3.95 1229 4.88 1323 5.93 1409 6.96
7200 2040 914 2.32 937 2.89 955 2.30 979 2.63 1027 3.06 1074 3.42 1121 3.86 1170 4.35 1257 5.28 1348 6.37 1434 7.45
7600 2153 961 2.54 985 3.38 1003 3.08 1024 3.01 1069 3.42 1112 3.80 1158 4.29 1204 4.48 1291 5.78 1374 6.80 1459 8.00
8000 2266 1008 2.78 1032 3.85 1050 3.81 1068 3.39 1111 3.82 1153 4.30 1196 4.72 1238 5.20 1325 6.27 1401 7.29 1485 8.51
3.0”
RPM BHP
1/4”
RPM BHP
1/8”
RPM BHP
3/8”
RPM BHP
1/2”
RPM BHP
3/4”
RPM BHP
1.0”
RPM BHP
1-1/4”
RPM BHP
1-1/2”
RPM BHP
2.0”
RPM BHP
2-1/2”
RPM BHP
SP, in. WG
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 include the effects of a discharge scoop in the airstream.
Consult Central Blower Co. for CFM and S.P. not listed above.
91Z0
Central Type RE
Centrifugal Blowers
are available as
U.L. Listed for
Grease Removal
(UL762)
Central Blower Co. certifies that the
Belt Drive Blowers shown on pages
2 through 15 are licensed to bear
the AMCA Seal. The ratings shown
are based on tests and procedures
performed in accordance with
AMCA Publication 211 and comply
with the requirements of AMCA
Certified Ratings Program.
RE-22 22.25” Wheel Diameter
VOLUME
CFM
Outlet
Velocity
FPM
Outlet
Velocity
FPM
2200 756 479 0.14 532 0.20 573 0.25 613 0.31 681 0.42 762 0.57 845 0.73 920 0.89 1059 1.23 1185 1.68 1295 2.09
2400 824 512 0.18 563 0.18 604 0.29 642 0.36 710 0.49 765 0.61 850 0.79 925 0.97 1060 1.31 1182 1.72 1299 2.19
2600 893 544 0.21 595 0.21 638 0.35 672 0.40 739 0.55 794 0.68 861 0.83 930 1.02 1065 1.39 1182 1.79 1298 2.26
2800 962 579 0.25 627 0.25 669 0.39 703 0.47 768 0.60 823 0.76 875 0.89 941 1.09 1069 1.49 1188 1.89 1296 2.31
3000 1031 612 0.29 659 0.29 700 0.45 734 0.52 795 0.67 851 0.83 902 0.99 954 1.15 1073 1.57 1191 2.00 1300 2.44
3200 1100 648 0.35 692 0.35 731 0.51 768 0.59 826 0.74 880 0.92 931 1.09 977 1.24 1084 1.63 1198 2.12 1305 2.58
3400 1168 682 0.42 725 0.40 763 0.58 799 0.66 857 0.82 910 1.00 960 1.19 1004 1.37 1098 1.74 1201 2.23 1309 2.71
3600 1239 718 0.48 758 0.56 795 0.65 830 0.74 888 0.92 938 1.09 987 1.29 1032 1.49 1113 1.83 1213 2.32 1312 2.83
3800 1306 753 0.55 791 0.64 829 0.74 860 0.83 920 1.02 969 1.20 1015 1.39 1061 1.60 1141 1.99 1228 2.42 1320 2.97
4000 1374 789 0.63 825 0.72 860 0.84 892 0.92 951 1.13 1000 1.31 1045 1.50 1090 1.72 1170 2.16 1240 2.53 1332 3.09
4200 1443 825 0.71 859 0.80 893 0.92 925 1.03 983 1.23 1032 1.44 1076 1.64 1119 1.85 1199 2.32 1270 2.74 1348 3.21
4400 1512 860 0.79 892 0.91 926 1.01 958 1.16 1015 1.36 1063 1.59 1108 1.78 1149 1.99 1227 2.48 1298 2.95 1362 3.35
4600 1581 896 0.91 929 1.02 960 1.13 991 1.28 1047 1.50 1095 1.72 1139 1.94 1179 2.15 1255 2.63 1327 3.14 1391 3.60
4800 1649 932 1.03 963 1.13 992 1.25 1023 1.39 1078 1.62 1128 1.86 1170 2.11 1209 2.32 1273 2.80 1355 3.35 1420 3.84
5000 1718 969 1.14 999 1.26 1027 1.37 1057 1.51 1120 1.76 1159 2.03 1202 2.29 1240 2.51 1312 2.97 1383 3.55 1449 4.08
5200 1787 1005 1.26 1034 1.41 1061 1.52 1089 1.65 1142 1.95 1190 2.31 1232 2.47 1272 2.72 1343 3.19 1401 3.75 1478 4.33
5400 1856 1041 1.42 1070 1.57 1097 1.68 1122 1.181 1175 2.13 1221 2.38 1266 2.65 1303 2.92 1375 3.42 1440 3.96 1505 4.58
5600 1924 1079 1.58 1105 1.72 1131 1.84 1157 1.98 1208 2.31 1252 2.55 1298 2.86 1336 3.13 1406 6.65 1469 4.17 1534 4.81
5800 1993 114 1.75 1140 1.88 1165 2.01 1190 2.14 1240 2.48 1285 2.75 1329 3.08 1368 3.33 1438 3.89 1500 4.45 1562 5.05
3.0”
RPM BHP
1/4”
RPM BHP
1/8”
RPM BHP
3/8”
RPM BHP
1/2”
RPM BHP
3/4”
RPM BHP
1.0”
RPM BHP
1-1/4”
RPM BHP
1-1/2”
RPM BHP
2.0”
RPM BHP
2-1/2”
RPM BHP
SP, in. WG

Page 8 • Central Blower Restaurant Exhaust Fan Catalog
Series BI UL
Backward Inclined Blowers for Restaurant Exhaust
Heavy gauge all welded housing
Weather Cover
(serves as belt guard)
AMCA licensed to
bear the AMCA seal
Drain fitting for
grease removal
Adjustable inlet foot to prevent
distortion on uneven surfaces
Precision spun
inlet cone
Backward inclined self
cleaning wheel
91Z0
Central Type Bl
Centrifugal Blowers
are available as
U.L. Listed for
Grease Removal
(UL762)
Central Blower Co. certifies that the
Belt Drive Blowers shown on pages
2 through 15 are licensed to bear
the AMCA Seal. The ratings shown
are based on tests and procedures
performed in accordance with
AMCA Publication 211 and comply
with the requirements of AMCA
Certified Ratings Program.

Central Blower Restaurant Exhaust Fan Catalog • Page 9
Series BI UL Features
Motors
▲ Quality US made
▲ Sized to fit CFM requirements
▲ Mounted outside, away from
heat and grease
Drives
▲ Quality US made
▲ Cast iron for long life
▲ Variable pitch motor pulley
for speed adjustment
Bearings
▲ Highest quality
▲ Rubber isolated for quiet
operation
UL 762 label
Bolted & gasketed
cleanout door
Housing painted
w/UL recognized
powder paint
Heavy duty motor plate
Shaft seal
Top quality bearings
Heavy duty
welded frame
Adjustable motor
pulley

Page 10 • Central Blower Restaurant Exhaust Fan Catalog
MODEL WHEEL SHAFT
NO. DIA.ABCEGH I J K LMNPQRDIA.
9 BI 9 3/16 7 1/2 6 11/32 20 1/8 9 3/8 1 11/16 11 3/8 1 3/4 10 1/2 7 7/8 23 19 1/4 3/8 15 3/8 5/8
10 BI 10 5/8 8 3/16 8 3/16 23 3/16 10 1/4 1 9/16 13 1 3/4 11 8 7/8 26 1/2 21 3/4 3/8 17 3/16 3/4
12 BI 12 1/4 13 1/8 9 13/16 24 1/16 14 5/8 3 11/16 16 1 3/4 11 1/2 13 29 11 3/4 21 3/4 7/16 22 5/8 11 1
15 BI 15 16 1/8 12 29 1/8 17 5/8 4 1/4 19 2 12 1/2 15 7/8 32 14 1/8 26 1/4 9/16 27 5/8 14 1
18 BI 18 1/4 19 9/16 14 5/8 35 1/2 21 1/2 5 1/4 22 5/8 2 15 5/16 19 5/16 38 1/8 16 7/8 31 7/8 9/16 33 5/8 18 1 3/16
20 BI 20 21 7/16 15 15/16 38 7/8 23 1/2 5 23/32 22 5/8 2 3/16 15 5/16 21 3/16 39 7/16 18 3/16 33 7/8 9/16 36 7/8 22 5/8 1 3/16
22 BI 22 1/4 23 13/16 17 13/16 42 7/8 25 7/8 6 1/16 26 1/8 2 1/4 16 1/2 23 1/2 43 15/16 20 1/8 37 15/16 9/16 40 15/16 20 1 3/16
24 BI 24 1/2 26 3/16 19 5/8 49 9/16 27 7/8 6 1/8 26 1/8 2 1/4 16 1/2 25 7/8 45 1/16 21 15/16 39 15/16 9/16 45 15/16 26 1/8 1 3/16
27 BI 27 29 21 5/8 52 31 1/4 7 1/4 30 3/8 2 1/4 18 3/8 28 9/16 49 1/8 24 1/4 45 27/32 9/16 49 13/16 24 1 7/16
30 BI 30 32 3/16 24 59 1/4 36 1/4 9 1/2 39 2 20 11/16 31 1/2 58 26 15/16 54 1/4 9/16 55 1/2 39 1 11/16
36 BI 36 1/2 39 1/8 29 3/16 71 3/8 43 7/8 11 3/8 47 2 22 7/8 38 5/8 70 31 9/16 65 7/8 9/16 67 3/16 47 1 15/16
Dimensional Table
Series BI UL
Backward Inclined Blowers for Restaurant Exhaust

9-BI 9 3/16-INCH WHEEL DIAMETER
OUTLET AREA (SQ. FT.) .33
TIP SPEED (FPM) = 2.41 x RPM
MAX. BHP = .0205 x (RPM/1000)3
1-1/2”
RPM BHP
SP, in. WG
100 297 875 0.01 1054 0.01 1206 0.02 1343 0.03 1467 0.04 1690 0.05 1887 0.07 2067 0.09 2233 0.11 2388 0.14 2672 0.19 2930 0.24 3167 0.30
200 593 1012 0.02 1172 0.02 1307 0.03 1429 0.04 1543 0.05 1750 0.07 1937 0.09 2107 0.12 2265 0.14 2413 0.17 2685 0.22 2934 0.28 3164 0.35
300 890 1200 0.03 1333 0.04 1459 0.05 1575 0.06 1683 0.07 1874 0.09 2044 0.12 2202 0.15 2350 0.18 2491 0.21 2753 0.27 2993 0.34 3215 0.41
400 1187 1429 0.05 1541 0.07 1645 0.08 1745 0.09 1842 0.10 2024 0.13 2190 0.16 2345 0.19 2484 0.22 2615 0.25 2859 0.32 3085 0.40 3298 0.48
500 1481 1673 0.08 1774 0.10 1866 0.12 1953 0.13 2036 0.15 2196 0.18 2349 0.21 2495 0.25 2632 0.28 2762 0.32 3002 0.40 3217 0.48 3418 0.56
600 1781 1929 0.13 2018 0.15 2102 0.17 2183 0.19 2257 0.21 2399 0.24 2535 0.28 2666 0.31 2794 0.36 2919 0.40 3149 0.48 3365 0.57 3565 0.66
700 2077 2193 0.18 2272 0.21 2348 0.23 2421 0.26 2492 0.29 2623 0.33 2746 0.37 2865 0.40 2980 0.45 3092 0.49 3311 0.59 3517 .069 3711 0.79
800 2374 2462 0.26 2533 0.29 2602 .0.31 2668 0.34 2733 0.37 2858 0.43 2973 0.48 3082 0.52 3187 0.57 3291 0.61 3490 0.71 3683 0.82 3871 0.93
900 2671 2735 0.36 2800 0.38 2862 0.41 2923 0.44 2983 0.48 3098 0.54 3208 0.61 3312 0.67 3410 0.72 3506 0.76 3691 0.86 3869 0.97 4042 1.09
1000 2967 3011 0.47 3070 0.50 3128 0.54 3184 0.57 3239 0.60 3345 0.68 3448 0.75 3548 0.82 3643 0.89 3732 0.95 3905 1.06 4072 1.16 4234 1.28
1100 3264 3289 0.62 3344 0.65 3397 0.68 3449 0.72 3500 0.76 3599 0.83 3695 0.91 3789 0.99 3879 1.08 3968 1.15 4131 1.28 4288 1.40 4441 1.52
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.
3-1/2”
RPM BHP
3.0”
RPM BHP
2-1/2”
RPM BHP
2.0”
RPM BHP
12-BI 12 1/4-INCH WHEEL DIAMETER
OUTLET AREA (SQ. FT.) .855
TIP SPEED (FPM) = 3.21 x RPM
MAX. BHP = .079 x (RPM/1000)3
SP, in. WG
800 936 904 0.06 993 0.08 1077 0.10 1159 0.13 1240 0.16 1401 0.21 1548 0.27
1000 1170 1055 0.10 1120 0.12 1190 0.14 1261 0.17 1329 0.20 1459 0.25 1593 0.32 1721 0.39 1840 0.46 1955 0.53
1200 1404 1194 0.14 1260 0.16 1329 0.20 1389 0.23 1445 0.26 1560 0.32 1669 0.41 1775 0.46 1890 0.54 1999 0.62 2200 0.79 2389 0.97
1400 1637 1352 0.20 1410 0.23 1469 0.27 1521 0.30 1578 0.33 1679 0.40 1779 0.48 1870 0.55 1965 0.63 2055 0.71 2249 0.89 2433 1.09 2600 1.30
1600 1871 1519 0.28 1566 0.31 1618 0.35 1667 0.39 1713 0.43 1809 0.52 1889 0.58 1989 0.67 2070 0.75 2150 0.84 2313 1.02 2482 1.23 2648 1.44
1800 2105 1680 0.39 1728 0.42 1770 0.45 1812 0.50 1860 0.54 1948 0.62 2030 0.71 2110 0.80 2190 0.89 2268 1.00 2410 1.18 2559 1.39 2700 1.60
2000 2339 1850 0.48 1890 0.54 1930 0.59 1970 0.63 2010 0.67 2090 0.77 2169 0.86 2240 0.96 2315 1.06 2386 1.17 2529 1.38 2659 1.58 2789 1.80
2200 2573 2021 0.62 2059 0.70 2091 0.74 2130 0.79 2165 0.83 2239 0.94 2310 1.03 2380 1.14 2450 1.25 2518 1.36 2641 1.58 2771 1.83 2890 2.05
2400 2807 2195 0.84 2225 0.85 2260 0.93 2290 0.97 2323 1.03 2390 1.13 2458 1.23 2520 1.34 2588 1.46 2650 1.58 2771 1.83 2890 2.06 3019 2.33
2600 3041 2369 1.08 2395 1.01 2425 1.15 2459 1.18 2485 1.24 2549 1.35 2610 1.46 2670 1.59 2730 1.70 2790 1.83 2909 2.09 3020 2.36 3128 2.61
2800 3275 2540 1.34 2569 1.32 2590 1.32 2620 1.46 2650 1.48 2709 1.62 2761 1.73 2820 1.86 2878 2.00 2930 2.12 3041 2.39 3151 2.67 3258 2.95
3000 3509 2711 1.58 2740 1.65 2761 1.55 2790 1.73 2818 1.79 2870 1.91 2920 2.04 2973 2.16 3029 2.30 3080 2.45 3181 2.70 3290 3.08 3389 3.32
3-1/2”
RPM BHP
3.0”
RPM BHP
2-1/2”
RPM BHP
2.0”
RPM BHP
VOLUME
CFM O.V. FPM 1/4” RPM BHP
3/8”
RPM BHP
1/2”
RPM BHP
5/8”
RPM BHP
3/4”
RPM BHP
1.0”
RPM BHP
1-1/4”
RPM BHP
1-3/4”
RPM BHP
VOLUME
CFM O.V. FPM 1/4” RPM BHP
3/8”
RPM BHP
1/2”
RPM BHP
5/8”
RPM BHP
3/4”
RPM BHP
1.0”
RPM BHP
1-1/4”
RPM BHP
1-1/2”
RPM BHP
1-3/4”
RPM BHP
Central Blower Restaurant Exhaust Fan Catalog • Page 11
10-BI 10 5/8-INCH WHEEL DIAMETER
OUTLET AREA (SQ. FT.) .452
TIP SPEED (FPM) = 2.78 x RPM
MAX. BHP = .0283 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
200 442 812 0.02 965 0.03 1098 0.04 1212 0.05 1322 0.06 1521 0.09 1698 0.12 1857 0.15 2002 0.19 2140 0.23 2389 0.31 2611 0.40 2820 0.50
300 664 901 0.02 1041 0.04 1161 0.05 1269 0.06 1373 0.08 1561 0.11 1725 0.14 1873 0.18 2019 0.22 2153 0.26 2403 0.35 2629 0.45 2833 0.55
400 885 1000 0.03 1134 0.05 1251 0.06 1357 0.08 1450 0.09 1623 0.13 1779 0.17 1929 0.21 2067 0.25 2193 0.30 2425 0.39 2642 0.50 2850 0.61
500 1106 1121 0.05 1233 0.07 1345 0.08 1449 0.10 1541 0.12 1710 0.16 1859 0.20 1995 0.24 2123 0.29 2248 0.34 2481 0.44 2692 0.55 2885 0.67
600 1327 1259 0.07 1358 0.09 1451 0.11 1546 0.13 1636 0.15 1801 0.19 1950 0.23 2082 0.28 2207 0.33 2321 0.38 2540 0.49 2746 0.61 2941 0.73
700 1548 1404 0.10 1491 0.12 1577 0.14 1659 0.16 1739 0.18 1896 0.23 2041 0.28 2173 0.33 2298 0.38 2411 0.44 2621 0.55 2817 0.68 2998 0.81
800 1720 1559 0.14 1634 0.16 1710 0.18 1785 0.21 1859 0.23 2000 0.28 2136 0.33 2268 0.38 2388 0.44 2502 0.50 2711 0.62 2901 0.75 3075 0.89
900 1991 1715 0.19 1785 0.21 1852 0.24 1920 0.26 1986 0.28 2118 0.34 2240 0.39 2362 0.45 2482 0.51 2596 0.57 2801 0.70 2993 0.84 3167 0.98
1000 2212 1876 0.25 1940 0.27 2001 0.30 2061 0.32 2123 0.35 2241 0.40 2358 0.46 2469 0.53 2582 0.59 2690 0.66 2895 0.79 3083 0.94 3259 1.09
1200 2654 2203 0.40 2259 0.43 2309 0.46 2364 0.49 2412 0.52 2516 0.58 2613 0.65 2713 0.72 2811 0.79 2903 0.86 3092 1.01 3272 1.17 3442 1.34
1400 3097 2539 0.61 2583 0.65 2630 0.68 2675 0.71 2721 0.75 2809 0.82 2898 0.89 2983 0.97 3069 1.04 3152 1.13 3318 1.29 3478 1.47 3639 1.64
1600 3539 2874 0.89 2916 0.93 2955 0.97 2998 1.01 3039 1.04 3118 1.12 3192 1.20 3269 1.29 3348 1.37 3420 1.46 3570 1.64 3718 1.83 3858 2.02
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)

Page 12 • Central Blower Restaurant Exhaust Fan Catalog
15-BI 15-INCH WHEEL DIAMETER
OUTLET AREA (SQ. FT.) 1.282
TIP SPEED (FPM) = 3.93 x RPM
MAX. BHP = .217 x (RPM/1000)3
SP, in. WG
1000 780 730 0.08 809 0.11 872 0.13 934 0.16 996 0.19 1108 0.25 1217 0.32 1320 0.39 1418 0.47 1510 0.55 1682 0.72 1837 0.89 1980 1.07
1100 858 767 0.10 847 0.13 912 0.15 969 0.18 1026 0.21 1131 0.27 1235 0.35 1334 0.42 1427 0.50 1519 0.58 1689 0.76 1843 0.94 1986 1.13
1200 936 804 0.11 885 0.15 952 0.18 1007 0.21 1062 0.23 1160 0.30 1257 0.37 1351 0.45 1442 0.53 1529 0.62 1695 0.80 1848 1.00 1991 1.20
1400 1092 879 0.14 959 0.19 1027 0.23 1086 0.27 1133 0.30 1229 0.37 1315 0.45 1401 0.52 1483 0.61 1564 0.70 1719 0.89 1865 1.10 2004 1.32
1600 1248 960 0.19 1032 0.23 1101 0.28 1161 0.33 1210 0.38 1307 0.46 1386 0.54 1464 0.62 1539 0.71 1613 0.80 1756 1.00 1893 1.22 2025 1.44
1800 1404 1046 0.24 1110 0.29 1174 0.34 1235 0.40 1285 0.46 1385 0.55 1466 0.64 1537 0.73 1607 0.82 1674 0.92 1806 1.12 1934 1.35 2057 1.59
2000 1560 1136 0.31 1193 0.36 1251 0.42 1308 0.47 1360 0.52 1460 0.65 1543 0.76 1617 0.87 1683 0.96 1745 1.06 1867 1.28 1987 1.50 2101 1.74
2200 1716 1227 0.39 1279 0.44 1332 0.50 1385 0.56 1435 0.62 1535 0.76 1619 0.89 1694 1.01 1763 1.13 1823 1.23 1938 1.45 2049 1.69 2158 1.93
2400 1872 1319 0.48 1368 0.54 1417 0.60 1464 0.67 1511 0.74 1607 0.88 1693 1.02 1770 1.16 1839 1.29 1905 1.42 2015 1.56 2119 1.90 2221 2.15
2600 2028 1413 0.58 1459 0.65 1503 0.72 1548 0.79 1592 0.86 1681 1.01 1767 1.17 1844 1.32 1915 1.47 1973 1.61 2096 1.89 2196 2.14 2292 2.40
2800 2184 1508 0.71 1551 0.78 1593 0.85 1634 0.92 1675 0.99 1759 1.15 1839 1.32 1918 1.49 1989 1.66 2055 1.82 2172 2.12 2276 2.41 2368 2.69
3000 2340 1603 0.85 1644 0.92 1684 1.00 1722 1.07 1760 1.14 1836 1.31 1915 1.67 1990 1.67 2063 1.85 2129 2.03 2248 2.37 2354 2.69 2448 3.00
3200 2496 1699 1.00 1738 1.09 1776 1.17 1813 1.25 1849 1.33 1921 1.50 1993 1.68 2065 1.87 2135 2.06 2203 2.26 2323 2.63 2430 2.99 2527 3.33
3400 2652 1796 1.18 1833 1.27 1869 1.36 1904 1.44 1938 1.52 2006 1.71 2070 1.89 2142 2.08 2209 2.29 2275 2.49 2397 2.90 2506 3.30 2603 3.66
3600 2808 1892 1.38 1928 1.47 1962 1.57 1996 1.66 2028 1.75 2092 1.93 2157 2.12 2220 2.32 2285 2.53 2348 2.75 2471 3.19 2579 3.61 2680 4.03
3800 2964 1990 1.60 2024 1.70 2056 1.80 2088 1.89 2119 1.98 2181 2.18 2242 2.38 2302 2.59 2362 2.80 2424 3.02 2543 3.48 2654 3.94 2753 4.38
4000 3120 2087 1.84 2120 1.95 2151 2.05 2182 2.15 2211 2.25 2271 2.46 2328 2.66 2387 2.88 2442 3.09 2502 3.32 2616 3.80 2727 4.29 2828 4.76
4200 3276 2185 2.11 2216 2.22 2247 2.33 2276 2.44 2304 2.55 2362 2.76 2416 2.97 2472 3.19 2527 3.42 2580 3.65 2692 4.14 2799 4.64 2902 5.16
3-1/2”
RPM BHP
2-1/2”
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.
18-BI 18 1/4 -INCH WHEEL DIAMETER
OUTLET AREA (SQ. FT.) 1.898
TIP SPEED (FPM) = 4.78 x RPM
MAX. BHP = .580 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 1.0”
RPM BHP
1-3/4”
RPM BHP
1-1/2”
RPM BHP
1-1/4”
RPM BHP
SP, in. WG
1600 843 594 0.12 651 0.16 704 0.20 760 0.25 813 0.30 913 0.40 1000 0.51 1088 0.62 1169 0.74 1245 0.87 1387 1.14 1517 1.46 1637 1.80
1800 948 641 0.15 692 0.19 742 0.24 789 0.28 840 0.34 935 0.45 1022 0.57 1100 0.68 1178 0.80 1254 0.94 1393 1.21 1520 1.51 1639 1.86
2000 1054 690 0.19 737 0.23 783 0.28 827 0.33 869 0.38 959 0.50 1044 0.63 1123 0.75 1194 0.88 1263 1.01 1401 1.30 1527 1.61 1643 1.93
2200 1159 739 0.23 784 0.28 826 0.33 868 0.38 907 0.43 987 0.55 1067 0.68 1144 0.83 1217 0.97 1284 1.11 1410 1.40 1535 1.72 1651 2.05
2400 1264 789 0.28 833 0.33 872 0.38 911 0.44 948 0.49 1019 0.61 1095 0.75 1167 0.90 1238 1.05 1307 1.21 1428 1.51 1544 1.83 1659 2.18
2600 1370 839 0.33 881 0.39 920 0.45 956 0.50 991 0.56 1060 0.69 1125 0.82 1195 0.97 1262 1.13 1327 1.30 1452 1.63 1561 1.96 1668 2.31
2800 1475 890 0.39 931 0.46 969 0.52 1003 0.58 1036 0.64 1101 0.77 1163 0.91 1224 1.05 1290 1.22 1352 1.39 1474 1.75 1585 2.11 1685 2.47
3000 1581 942 0.46 982 0.53 1017 0.60 1051 0.67 1082 0.73 1144 0.87 1204 1.01 1261 1.15 1318 1.31 1380 1.49 1494 1.86 1608 2.27 1709 2.64
3200 1686 994 0.54 1032 0.61 1067 0.69 1100 0.76 1130 0.83 1189 0.97 1246 1.12 1301 1.27 1354 1.43 1408 1.60 1521 1.99 1626 2.39 1732 2.82
3400 1791 1046 0.66 1083 0.71 1117 0.78 1149 0.86 1179 0.94 1235 1.09 1289 1.24 1342 1.40 1394 1.56 1433 1.73 1549 2.12 1652 2.54 1751 2.97
3600 1897 1099 0.72 1134 0.81 1167 0.89 1198 0.97 1228 1.05 1282 1.21 1334 1.37 1385 1.54 1435 1.71 1483 1.88 1578 2.25 1679 2.69 1774 3.13
3800 2002 1152 0.83 1186 0.92 1281 1.01 1248 1.09 1277 1.18 1331 1.35 1380 1.52 1429 1.69 1477 1.86 1524 2.04 1613 2.41 1708 2.85 1802 3.31
4200 2213 1259 1.07 1291 1.17 1321 1.27 1350 1.37 1377 1.46 1428 1.66 1476 1.85 1521 2.03 1565 2.22 1608 2.41 1694 2.81 1774 3.21 1858 3.68
4600 2424 1368 1.37 1397 1.47 1425 1.58 1452 1.69 1478 1.80 1527 2.01 1573 2.22 1617 2.43 1658 2.63 1698 2.83 1777 3.25 1856 3.69 1929 4.13
5000 2634 1476 1.71 1504 1.83 1530 1.95 1556 2.06 1581 2.18 1628 2.41 1672 2.54 1714 2.87 1754 3.10 1792 3.31 1866 3.76 1939 4.22 2011 4.69
5400 2845 1586 2.11 1612 2.24 1637 2.37 1661 2.49 1684 2.62 1729 2.88 1772 3.12 1812 3.37 1851 3.62 1888 3.86 1958 4.34 2027 4.82 2094 5.31
5800 3056 1696 2.58 1720 2.71 1744 2.85 1767 2.98 1789 3.12 1832 3.40 1873 3.67 1912 3.93 1949 4.20 1986 4.48 2054 4.98 2117 5.49 2182 6.01
6200 3267 1806 3.11 1829 3.25 1851 3.40 1873 3.54 1894 3.69 1936 3.98 1975 4.28 2013 4.56 2049 4.84 2084 5.13 2151 5.70 2213 6.24 2272 6.79
3-1/2”
RPM BHP
3.0”
RPM BHP
2-1/2”
RPM BHP
2.0”
RPM BHP
VOLUME
CFM O.V. FPM 1/4” RPM BHP
3/8”
RPM BHP
1/2”
RPM BHP
5/8”
RPM BHP
3/4”
RPM BHP
1.0”
RPM BHP
1-1/4”
RPM BHP
1-1/2”
RPM BHP
1-3/4”
RPM BHP
2.0”
RPM BHP 3.0”
RPM BHP
VOLUME
CFM
91Z0
Central Type Bl
Centrifugal Blowers
are available as
U.L. Listed for
Grease Removal
(UL762)

20-BI 20-INCH WHEEL DIAMETER
OUTLET AREA (SQ. FT.) 2.280
TIP SPEED (FPM) = 5.24 x RPM
MAX. BHP = .910 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
1900 833 517 0.13 582 0.18 637 0.23 689 0.28 736 0.34 825 0.45 904 0.57 983 0.73
2200 965 541 0.16 621 0.23 672 0.31 720 0.34 766 0.40 850 0.52 928 0.65 1000 0.79 1066 0.93
2500 1096 586 0.20 646 0.27 711 0.34 757 0.40 799 0.46 881 0.61 950 0.74 1024 0.89 1090 1.04 1152 1.20
2800 1228 634 0.25 677 0.31 740 0.41 796 0.47 837 0.54 912 0.68 985 0.84 1052 1.00 1114 1.16 1176 1.33 1288 1.68 1390 2.05
3100 1360 683 0.31 724 0.38 763 0.45 824 0.54 876 0.63 949 0.78 1017 0.95 1083 1.12 1144 1.29 1201 1.47 1312 1.84 1413 2.23 1507 2.64
3400 1491 735 0.39 772 0.46 807 0.53 848 0.61 903 0.71 988 0.90 1053 1.07 1114 1.24 1175 1.43 1231 1.62 1336 2.01 1437 2.42 1531 2.85
3700 1623 789 0.47 821 0.55 855 0.63 887 0.71 927 0.80 1026 1.02 1091 1.21 1150 1.39 1206 1.58 1260 1.79 1366 2.20 1462 2.63 1555 3.08
4000 1754 843 0.57 871 0.65 903 0.73 934 0.82 963 0.90 1049 1.13 1131 1.36 1189 1.56 1243 1.76 1294 1.96 1397 2.40 1491 2.85 1579 3.32
4300 1886 897 0.67 924 0.76 952 0.85 982 0.95 1010 1.04 1073 1.24 1159 1.50 1228 1.74 1281 1.95 1332 2.16 1429 2.61 1522 3.09 1609 3.58
4600 2018 952 0.80 978 0.89 1002 0.99 1031 1.09 1058 1.18 1109 1.38 1183 1.64 1261 1.91 1320 2.15 1370 2.38 1463 2.85 1554 3.34 1639 3.84
4900 2149 1008 0.94 1032 1.04 1056 1.14 1080 1.25 1106 1.35 1156 1.56 1207 1.78 1285 2.07 1357 2.37 1409 2.62 1501 3.11 1585 3.60 1671 4.14
5200 2281 1064 1.10 1087 1.20 1109 1.31 1131 1.42 1155 1.53 1204 1.75 1249 1.97 1309 2.24 1380 2.55 1448 2.87 1539 3.38 1623 3.82 1702 4.44
5800 2544 1176 1.46 1197 1.58 1218 1.70 1238 1.82 1257 1.94 1301 2.19 1344 2.43 1385 2.68 1428 2.95 1495 3.30 1618 4.00 1700 4.57 1776 5.14
6400 2807 1289 1.91 1309 2.04 1328 2.17 1346 2.30 1364 2.43 1400 2.71 1440 2.97 1479 3.24 1517 3.52 1553 3.80 1665 4.53 1776 5.30 1853 5.94
7000 3070 1403 2.44 1421 2.58 1438 2.72 1456 2.87 1473 3.01 1505 3.30 1539 3.60 1576 3.89 1612 4.19 1646 4.49 1712 5.10 1823 5.94 1925 6.79
7600 3333 1517 3.07 1534 3.22 1550 3.37 1567 3.53 1582 3.68 1613 4.00 1643 4.32 1674 4.64 1709 4.96 1742 5.24 1836 6.23 1870 6.62 1972 7.54
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.
22-BI 22.25 -INCH WHEEL DIAMETER
OUTLET AREA (SQ. FT.) 2.821
TIP SPEED (FPM) = 5.83 x RPM
MAX. BHP = 1.562 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
2200 780 466 0.16 514 0.21 564 0.27 611 0.34 658 0.42 737 0.55 815 0.71 888 0.87 955 1.05 1018 1.23 1136 1.66 1243 2.12 1341 2.61
2500 886 503 0.20 547 0.26 589 0.32 633 0.39 675 0.47 757 0.63 827 0.79 895 0.95 963 1.14 1024 1.33 1138 1.73 1245 2.20 1343 2.71
2800 993 542 0.25 583 0.31 622 0.39 659 0.44 698 0.2 774 0.70 846 0.88 910 1.06 975 1.24 1031 1.44 1145 1.86 1248 2.30 1346 2.81
3100 1099 583 0.30 621 0.37 657 0.44 692 0.52 725 0.59 796 0.77 863 0.96 929 1.17 988 1.36 1042 1.56 1152 2.00 1255 2.46 1350 2.95
3400 1205 624 0.37 661 0.45 694 0.52 727 0.60 759 0.68 820 0.85 885 1.06 945 1.27 1007 1.50 1061 1.71 1162 2.14 1262 2.63 1357 3.14
3700 1312 665 0.44 701 0.53 733 0.61 760 0.69 793 0.78 851 0.96 908 1.16 968 1.38 1023 1.61 1080 1.86 1180 2.32 1272 2.80 1364 3.33
4000 1418 707 0.53 741 0.62 773 0.71 801 0.80 830 0.89 885 1.08 936 1.27 991 1.50 1045 1.74 1097 1.99 1200 2.52 1289 3.02 1374 3.53
4300 1524 750 0.63 783 0.73 813 0.83 841 0.92 867 1.02 919 1.21 970 1.42 1017 1.63 1069 1.88 1119 2.14 1216 2.68 1309 3.24 1391 3.78
4600 1631 793 0.74 824 0.84 854 0.95 881 1.05 906 1.16 956 1.36 1004 1.57 1050 1.80 1095 2.03 1143 2.30 1236 2.86 1326 3.45 1411 4.05
4900 1737 836 0.86 867 0.98 895 1.09 921 1.20 946 1.31 993 1.53 1039 1.75 1084 1.98 1122 2.22 1169 2.47 1259 3.05 1374 3.66 1429 4.30
5200 1843 879 1.00 909 1.12 936 1.24 962 1.36 987 1.48 1032 1.71 1075 1.94 1118 2.1 1160 2.43 1200 2.68 1282 3.25 1366 3.88 1444 4.52
5800 2056 967 1.32 995 1.45 1021 1.89 1045 1.72 1068 1.85 1112 2.12 1152 2.37 1191 2.63 1229 2.90 1267 3.17 1340 3.73 1413 4.35 1489 5.06
6400 2269 1056 1.70 1082 1.85 1106 2.00 1129 2.16 1151 2.30 1193 2.59 1232 2.89 1268 3.17 1303 3.45 1339 3.74 1407 4.34 1473 4.95 1538 5.62
7000 2481 1146 2.16 1170 2.33 1192 2.49 1214 2.66 1235 2.82 1275 3.14 1312 3.46 1348 3.78 1381 4.098 1413 4.40 1478 5.03 1540 5.69 1601 6.36
7600 2694 1236 2.70 1258 2.88 1280 3.06 1300 3.24 1320 3.42 1358 3.77 1394 4.12 1429 4.47 1461 4.82 1492 5.15 1551 5.82 1610 6.51 1668 7.23
8200 2907 1327 3.33 1348 3.53 1368 3.72 1387 3.91 1406 4.10 1443 4.50 1477 4.87 1510 5.24 1542 5.62 1572 5.99 1629 6.71 1684 7.44 1738 8.19
8800 3119 1418 4.06 1438 4.26 1457 4.47 1475 4.68 1493 4.88 1528 5.30 1461 5.71 1593 6.11 1623 6.52 1653 6.92 1708 7.71 1760 8.48 1812 9.27
9400 3332 1510 4.89 1528 5.10 1546 5.32 1564 5.54 1581 5.76 1614 6.21 1646 6.66 1677 7.09 1706 7.52 1734 7.95 1789 8.82 1839 9.64 1887 10.1
3-1/2”
RPM BHP
3.0”
RPM BHP
2-1/2”
RPM BHP
2.0”
RPM BHP
Central Blower Restaurant Exhaust Fan Catalog • Page 13
91Z0
Central Type Bl
Centrifugal Blowers
are available as
U.L. Listed for
Grease Removal
(UL762)

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)

30-BI 30.00-INCH WHEEL DIAMETER
OUTLET AREA (SQ. FT.) 5.260
TIP SPEED (FPM) = 7.85 x RPM
MAX. BHP = 6.743 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
4000 760 351 0.25 387 0.35 419 0.43 452 0.53 484 0.64 544 0.91 602 1.16 657 1.47 707 1.73 754 2.00 837 2.64 915 3.33 986 4.00
4500 855 365 0.35 401 0.43 432 0.49 463 0.62 493 0.74 550 1.02 607 1.30 689 1.48 710 1.89 756 2.17 839 2.81 918 3.53 989 4.66
5000 950 390 0.37 424 0.46 450 0.58 482 0.69 508 0.84 562 1.12 620 1.42 666 1.73 713 2.04 759 2.35 844 3.00 920 3.77 990 4.54
5500 1045 416 0.43 450 0.57 477 0.70 504 0.84 527 0.99 576 1.23 630 1.57 678 1.86 720 2.22 766 2.52 847 3.21 924 4.01 993 4.81
6000 1140 443 0.49 476 0.67 501 0.81 526 0.98 551 1.11 594 1.38 644 1.72 689 2.02 729 2.41 774 2.72 851 3.43 927 4.28 997 5.11
6500 1239 468 0.62 502 0.78 526 0.98 547 1.12 576 1.28 612 1.53 661 1.85 702 2.22 731 2.59 787 2.95 857 3.65 932 4.54 1001 5.42
7000 1331 495 0.74 529 0.90 551 1.11 572 1.28 599 1.46 632 1.72 679 2.16 717 2.39 754 2.79 800 3.14 867 3.90 940 4.81 1008 5.68
8000 1521 553 1.06 581 1.23 600 1.44 624 1.62 648 1.81 682 2.10 7717 2.47 752 2.84 792 3.25 830 3.64 892 4.44 961 5.42 1024 6.35
9000 1711 612 1.47 636 1.60 652 1.80 677 2.01 697 2.22 732 2.54 765 2.96 797 3.52 831 3.78 868 4.20 926 5.12 990 6.07 1049 7.22
10000 1901 670 1.90 689 2.05 707 2.25 729 2.41 745 2.69 779 3.09 817 3.54 848 4.01 877 4.46 909 4.88 965 5.86 1020 6.77 1078 7.97
11000 2091 728 2.42 746 2.59 763 2.79 783 2.98 797 3.31 830 3.77 867 4.26 896 4.81 923 5.28 953 5.68 1009 6.79 1059 7.80 1112 8.89
12000 2281 785 3.04 801 3.21 817 3.42 835 3.64 851 4.05 883 4.57 918 5.06 945 5.70 971 6.21 1001 6.60 1055 7.72 1102 8.97 1150 9.97
13000 2471 842 3.73 857 3.95 873 4.20 887 4.42 904 4.79 935 5.37 968 5.91 995 6.64 1019 7.22 1046 7.72 1099 8.91 1144 10.2 1191 11.2
14000 2662 900 4.62 914 4.81 927 5.04 943 5.30 961 5.70 900 6.36 1017 6.89 1047 7.668 1071 8.31 1095 8.89 1146 10.1 1119 11.4 1236 12.6
15000 2852 958 5.59 971 5.74 984 5.95 1003 6.26 1019 6.69 1028 7.41 1069 7.99 1102 8.70 1125 9.44 1147 10.1 1199 11.4 1238 12.9 1278 14.0
16000 3042 1015 6.64 1028 6.84 1040 7.04 1060 7.35 1075 7.88 1103 8.60 1125 9.20 1151 9.97 1175 10.7 1197 11.4 1249 12.9 1285 14.4 1328 15.7
17000 3232 1073 7.78 1085 7.96 1098 8.21 1115 8.59 1131 9.10 1159 9.91 1181 10.5 1204 11.3 1227 12.2 1249 12.9 1301 14.4 1334 16.0 1373 17.4
18000 3422 1130 9.05 1143 9.31 1157 9.63 1175 10.0 1191 10.5 1206 11.4 1224 12.1 1260 12.9 1283 13.7 1307 14.5 1352 16.2 1384 17.9 1422 19.3
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.
36-BI 36.50-INCH WHEEL DIAMETER
OUTLET AREA (SQ. FT.) 7.785
TIP SPEED (FPM) = 9.56 x RPM
MAX. BHP = 17.977 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
6000 770 285 0.37 314 0.49 324 0.60 368 0.79 395 0.95 445 1.35 492 1.72 540 2.19 580 2.58 618 2.98 689 3.93 752 4.95 809 5.96
7000 899 309 0.49 337 0.68 362 0.79 385 0.95 411 1.17 456 1.57 503 2.01 545 2.25 584 2.91 621 3.34 685 4.29 754 5.39 812 6.43
8000 1027 337 0.60 365 0.82 389 0.99 411 1.19 429 1.43 471 1.81 516 2.25 556 2.70 591 3.23 629 3.66 695 4.70 759 5.87 815 7.05
9000 1156 369 0.77 396 1.01 416 1.10 436 1.48 457 1.68 491 2.08 533 2.56 569 3.07 601 3.60 638 4.08 701 5.10 763 6.40 821 7.68
10000 1284 396 1.02 423 1.28 442 1.55 460 1.79 482 2.03 510 2.41 551 2.89 583 3.42 614 4.00 652 4.48 709 5.61 769 6.93 826 8.26
11000 1412 428 1.30 454 1.59 471 1.86 490 2.14 510 2.38 538 2.78 571 3.31 602 3.84 632 4.42 668 4.99 720 6.09 778 7.49 834 8.83
12000 1541 462 1.64 484 1.88 500 2.19 519 2.47 539 2.74 566 3.18 594 3.73 623 4.29 653 4.83 684 5.48 735 6.67 791 8.08 844 9.50
13000 1669 493 2.05 515 2.25 527 2.58 549 2.89 564 3.16 593 3.64 625 4.22 647 4.88 677 5.45 706 6.05 754 7.55 808 8.77 850 10.2
14000 1798 592 2.49 542 2.67 556 2.98 575 3.27 529 3.62 619 4.13 653 4.79 675 5.45 701 6.05 729 6.65 777 8.08 832 9.50 874 11.0
15000 1926 557 2.92 573 3.13 588 3.40 606 3.66 618 4.09 646 4.71 678 5.37 703 6.07 726 6.76 753 7.35 799 8.85 843 10.3 981 11.9
16000 2055 588 3.42 604 3.66 617 3.98 634 4.22 645 4.68 675 5.37 704 6.07 729 6.85 752 7.57 777 8.13 823 9.78 865 11.2 908 12.8
17000 2183 623 3.98 636 4.22 648 4.53 664 4.84 677 5.39 704 6.07 732 6.87 756 7.71 777 8.42 802 9.03 847 10.7 886 12.3 929 13.8
18000 2312 652 4.61 666 4.90 686 5.19 685 5.54 706 6.12 732 6.89 761 7.68 784 8.16 805 9.36 827 9.96 872 11.7 911 13.4 951 14.9
20000 2569 717 6.16 728 6.47 739 6.82 753 7.16 766 7.77 791 8.61 817 9.45 839 10.5 859 11.4 880 12.2 923 14.0 960 15.9 998 17.5
22000 2825 783 8.08 793 8.33 803 8.64 817 9.08 823 9.72 854 10.7 874 11.5 892 12.6 919 13.7 936 14.7 980 16.6 1012 18.8 1051 20.5
24000 3082 845 10.1 854 10.4 865 10.7 880 11.2 893 12.0 916 13.1 935 14.0 954 15.1 973 16.3 1058 17.4 1036 19.5 1064 21.8 1099 23.7
26000 3339 911 12.5 919 12.8 932 13.3 945 13.8 957 14.6 982 15.9 998 16.8 1016 18.2 1036 19.3 1054 20.4 1093 22.8 1120 25.4 1151 27.4
3-1/2”
RPM BHP
3.0”
RPM BHP
2-1/2”
RPM BHP
2.0”
RPM BHP
Central Blower Restaurant Exhaust Fan Catalog • Page 15
91Z0
Central Type Bl
Centrifugal Blowers
are available as
U.L. Listed for
Grease Removal
(UL762)
REV 11/03

WARRANTY
Central Blower Co. (the Company) warrants that each blower manufactured by the Company shall be
free from defects in material and workmanship under normal use and service for a period of eighteen
(18) months from the date of shipment or twelve (12) months from date of original installation,“whichev-
er occurs first.” If it appears within the warranty period that the blower does not meet the warranties
specified above and the purchaser notifies the Company promptly, the Company agrees to remedy any
such defect, at the Company’s option, either by repairing any defective parts or by furnishing at the
Company’s factory a repair or replacement part.
This warranty shall not apply to any equipment which has been repaired or altered in any way so as,
in the Company’s judgement, to affect its performance or reliability, nor which has been improperly
installed or subject to misuse, negligence or accident. This warranty does not apply to electric motors,
which however, carry warranty of the motor manufacturer. Warranty does not apply to drive belts.
This warranty is expressed in lieu of all other warranties expressed or implied, and of all other obliga-
tions or liabilities on the Company’s part. The Company neither assumes, nor authorizes any representa-
tive or other persons to assume for it, any other liability in connection with the sale of its equipment.
CENTRAL BLOWER CO.
211 S. 7th Ave. • City of Industry, CA 91746 [phone] Fax [phone]
www.centralblower.com
Other Central Products
Series FCD
Double Inlet Forward Curved Blowers
Sizes: 18, 22, 26 and 30
Series FC
Belt Drive Blowers
Sizes 9 thru 30”
Forward Curved and
Backward Inclined Wheels
Coated Laboratory
Exhaust Fans

GBD
EXHAUST BLOWER
Installation, Maintenance
and Service Manual
Experience the Supreme Difference

2
Table of Contents
Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Basic Component Identification Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Exhaust Fan Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Motor Frame and Blower Wheel Assembly Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Drive Pulley and Driven Pulley Variations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Pulley Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
“How To” Adjust Belt Tension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
“How To” Replace Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
“How To” Replace Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
“How To” Increase Exhaust Air Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
“How To” Adjust Pulley . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
“How To” Decrease Exhaust Air Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
“How To” Replace Fan Wheel Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
“How To” Replace Blower Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
“How To” Replace Blower Wheel Shaft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15