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Fan Size 49"
Wheel Dia.
49.0 inches
1245 mm
Inlet Area
14.96 square feet 1.390 m
Outlet Area
14.96 square feet 1.390 m
Tip Speed
12.83 x RPM
3.911
ft./minute
m/minute
Table P-11 — Size 49 Q-Fan
CFM
Out-
Std.
let
1
/
"
3
/
"
4
8
Air
Vel.
RPM
BHP
RPM BHP
13000 868
353
1.0
376
1.2
•14000 935
373
1.1
395
1.4
15000 1002
394
1.3
414
1.6
•160001069
415
1.4
434
1.8
17000 1136
437
1.6
454
2.0
18000 1203
458
1.9
475
2.2
19000 1270
480
2.1
496
2.5
20000 1336
503
2.4
517
2.8
21000 1403
525
2.7
539
3.1
22000 1470
548
3.0
560
3.4
23000 1537
570
3.4
582
3.8
•240001604
593
3.7
605
4.2
25000 1671
616
4.2
627
4.6
26000 1737
639
4.6
649
5.1
27000 1804
662
5.1
672
5.6
28000 1871
685
5.6
695
6.1
29000 1938
708
6.1
717
6.6
30000 2005
731
6.7
740
7.2
31000 2072
754
7.3
763
7.9
32000 2139
777
8.0
786
8.6
33000 2205
801
8.7
809
9.3
34000 2272
824
9.4
832 10.0
35000 2339
847
10.2
855 10.8
36000 2406
871
11.0
878 11.7
CFM
Out-
1
1
Std.
let
2
/
"
2
/
"
4
2
Air
Vel.
RPM
BHP
RPM BHP
23000 1537
787
12.0
24000 1604
798
12.6
827 13.9
25000 1671
811
13.1
838 14.5
26000 1737
825
13.8
851 15.2
27000 1804
840
14.4
864 15.8
28000 1871
856
15.1
879 16.5
29000 1938
873
15.8
894 17.3
30000 2005
890
16.6
910 18. 1
31000 2072
907
17.5
927 18.9
32000 2139
925
18.4
944 19.8
33000 2205
944
19.4
962 20.8
34000 2272
962
20.4
980 21.9
35000 2339
981
21.4
999 23.0
36000 2406
1000
22.5
1017 24.1
37000 2473
1020
23.6
1036 25.2
38000 2540
1039
24.8
1055 26.4
39000 2606
1058
25.9
1075 27.6
40000 2673
1078
27.1
1094 28.9
41000 2740
1099
28.4
1114 30.2
42000 2807
1119
29.8
1133 31.6
43000 2874
1140
31.2
1154 33.0
44000 2941
1160
32.6
1174 34.5
45000 3008
1181
34.2
1195 36.0
46000 3074
1202
35.7
1215 37.6
Performance based on 0.075 lbs. per cubic foot density (air at 70 F and 29.92 Hg Bar).
Performance shown is for installation Type B: free inlet, ducted outlet.
Power rating (BHP) does not include drive losses.
Performance ratings do not include the effects of appurtenances in the airstream.
When inlet vanes are used increase rpm 1 percent and brake horsepower 3 percent.
Fan tables cover part of fan operating range; fan curves show full operating range.
Performance
Data
Pressure Class Limits
Class
I
2
II
2
Total Static Pressure
1
/
"
5
/
"
3
/
"
2
8
4
RPM
BHP
RPM
BHP
RPM
400
1.6
425
1.9
451
417
1.7
439
2.1
463
435
1.9
455
2.3
476
453
2.1
472
2.5
492
472
2.4
490
2.7
508
492
2.6
509
3.0
525
511
2.9
528
3.3
544
532
3.2
547
3.6
563
552
3.5
567
3.9
582
574
3.9
587
4.3
601
595
4.2
608
4.7
621
616
4.6
629
5.1
641
638
5.1
650
5.6
662
660
5.6
671
6.1
682
682
6.1
693
6.6
704
704
6.6
715
7.1
725
727
7.2
737
7.7
746
749
7.8
759
8.3
768
772
8.4
781
9.0
790
794
9.1
803
9.7
812
817
9.9
826
10.5
834
840
10.6
848
11.2
856
863
11.4
871
12.1
879
886
12.3
893
13.0
901
Total Static Pressure
1
3"
3
/
"
4"
2
RPM
BHP
RPM
BHP
RPM
903
18.1
913
18.8
925
19.5
974
22.8
939
20.3
985
23.6
953
21.2
996
24.4
1042
968
22.0
1009
25.3
1053
983
22.9
1023
26.3
1064
999
23.9
1038
27.3
1077
1016
24.9
1053
28.3
1091
1033
26.0
1069
29.4
1105
1051
27.2
1085
30.5
1120
1069
28.4
1102
31.7
1136
1088
29.8
1120
33.0
1152
1106
31.1
1137
34.4
1169
1125
32.4
1155
35.8
1186
1144
33.8
1174
37.5
1203
1163
35.3
1193
39.0
1221
1183
36.8
1211
40.6
1240
1202
38.3
1230
42.2
1258
1222
39.8
1250
43.8
1241
41.5
1269
45.5
42
Q Fan
Size 49
Minimum Fan RPM (Without VFRB Option)
Maximum RPM
949
1800 RPM
1274
1200 RPM
1"
1
1
/
"
4
BHP
RPM
BHP
RPM
BHP
2.3
2.4
2.6
521
3.5
2.9
532
3.7
3.1
545
4.0
585
4.9
3.4
560
4.3
596
5.2
3.7
576
4.6
610
5.6
4.1
593
4.9
624
5.9
4.4
611
5.3
640
6.3
4.8
629
5.8
657
6.7
5.2
648
6.2
674
7.2
5.6
667
6.7
692
7.7
6.1
686
7.2
711
8.3
6.6
706
7.7
730
8.8
7.1
726
8.2
749
9.4
7.7
746
8.8
768
10.0
8.3
767
9.5
788
10.7
8.9
788
10.1
808
11.4
9.6
809
10.8
828
12.1
10.3
830
11.6
848
12.9
11.1
851
12.4
869
13.7
11.9
873
13.2
890
14.5
12.7
895
14.1
911
15.4
13.6
917
15.0
933
16.4
1
4
/
"
5"
2
BHP
RPM
BHP
RPM
BHP
27.9
28.8
29.7
1107
33.5
30.8
1118
34.5
31.9
1129
35.6
1170
39.5
33.0
1143
36.8
1181
40.6
34.2
1156
38.0
1192
41.9
35.4
1171
39.2
1206
43.2
36.6
1186
40.5
1220
44.5
38.0
1201
41.9
1234
45.9
39.4
1217
43.3
1249
47.4
40.9
1234
44.8
1264
48.9
42.5
1251
46.4
44.3
1268
48.0
46.1
Motor
Minimum Fan RPM
301
201
1
1
/
"
1
3
/
"
2"
2
4
RPM
BHP
RPM
BHP RPM
BHP
645
6.6
657
7.0
691
8.1
671
7.4
702
8.5
685
7.8
715
9.0
745
10.2
701
8.3
729
9.5
757
10.7
718
8.8
744
10.0
771
11.2
735
9.3
760
10.5
785
11.8
753
9.9
777
11.1
801
12.4
772
10.6
794
11.8
817
13.0
790
11.3
812
12.5
834
13.7
809
12.0
830
13.2
851
14.5
828
12.7
849
14.0
869
15.3
848
13.5
868
14.8
888
16.2
867
14.2
887
15.6
906
17.1
887
15.1
906
16.5
925
18.0
908
15.9
926
17.4
944
18.9
928
16.9
946
18.4
964
19.9
949
17.8
966
19.3
983
20.9
1
1
5
/
"
6"
6
/
"
2
2
RPM
BHP
RPM
BHP RPM
BHP
1221
44.8
1230
46.0
1242
47.3
1254
48.6
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