25
Table 6 — Physical Data — Fan Data by Wheel Diameter and Type
*Minimum fan shaft diameter listed. Refer to Tables 22-24 for specific
diameter by unit size.
†See the section Fan Airflow Measurement Piezometer Ring on
page 113 for K Factor use.
FORWARD CURVE FANS
FAN
WHEEL
WHEEL
DIAMETER
(in.)
INLET
CONE
DIAMETER
(in.)
MAX SPEED (RPM)
FAN SHAFT DIAMETER
(in.)*
FAN WHEEL WEIGHT
(LB)
NUMBER
OF FAN
BLADES
K FACTOR
CLASS 1
CLASS 2
CLASS 1
CLASS 2
CLASS 1
CLASS 2
A9-4A
9
1
/
2
7
13
/
16
2132
2749
3
/
4
3
/
4
4
4
43
†
A10-8A
10
5
/
8
8
13
/
16
1806
2347
3
/
4
1
6
6
48
†
A12-11A
12
5
/
8
10
3
/
8
1533
1986
1
1
3
/
16
10
10
43
†
A12-12A
12
5
/
8
10
3
/
8
1491
1938
1
1
3
/
16
10
10
43
†
A15-15A
15
12
5
/
8
1262
1639
1
3
/
16
1
3
/
16
16
17
51
†
A18-18A
18
1
/
32
15
1
/
2
1097
1378
1
3
/
16
1
7
/
16
32
34
48
†
A20-15A
20
16
1
/
4
969
1238
1
7
/
16
1
11
/
16
51
51
37
†
A20-18A
20
16
1
/
4
960
1217
1
7
/
16
1
11
/
16
53
53
37
†
A20-18H
20
16
1
/
4
952
1237
1
3
/
16
1
7
/
16
42
45
51
†
A20-20H
20
16
1
/
4
952
1237
1
3
/
16
1
7
/
16
42
45
51
†
A22-22H
22
3
/
8
18
1
/
16
884
1119
1
7
/
16
2
3
/
16
63
63
37
†
A25-20H
25
21
5
/
16
770
980
1
11
/
16
2
7
/
16
73
73
37
†
A25-25H
25
21
5
/
16
751
960
1
11
/
16
2
7
/
16
81
81
37
†
A27-22H
27
5
/
8
23
15
/
16
684
873
1
11
/
16
2
7
/
16
101
101
37
†
A27-27H
27
5
/
8
23
15
/
16
656
865
1
11
/
16
2
7
/
16
111
111
37
†
A30-30H
30
1
/
4
26
3
/
8
618
793
1
11
/
16
2
11
/
16
128
128
37
†
32
31
1
/
2
25
3
/
4
675
760
2
3
/
16
2
3
/
16
132
134
38
23,750
36
35
7
/
16
29
600
660
2
7
/
16
2
7
/
16
158
178
42
31,300
40
39
32
3
/
4
550
600
2
7
/
16
2
7
/
16
194
214
48
37,650
AIRFOIL FANS
FAN
WHEEL
WHEEL
DIAMETER
(in.)
INLET
CONE
DIAMETER
(in.)
MAX SPEED (RPM)
FAN SHAFT DIAMETER
(in.)*
FAN WHEEL WEIGHT
(LB)
NUMBER
OF FAN
BLADES
K FACTOR
CLASS 1
CLASS 2
CLASS 1
CLASS 2
CLASS 1
CLASS 2
101
10
6
1
/
8
N/A
4655
N/A
1
N/A
8
18
631
121
12
1
/
4
7
1
/
2
N/A
4560
N/A
1
3
/
16
N/A
11
18
890
131
13
1
/
2
8
3
/
8
N/A
4033
N/A
1
7
/
16
N/A
15
18
1,098
161
16
1
/
2
10
1
/
8
N/A
3254
N/A
1
11
/
16
N/A
37
18
1,560
181
18
1
/
4
11
2261
2950
1
11
/
16
1
15
/
16
52
52
20
1,816
201
20
12
7
/
16
2019
2598
1
11
/
16
1
15
/
16
60
60
20
2,279
221
22
1
/
4
13
7
/
8
1872
2442
1
15
/
16
2
3
/
16
73
73
20
2,798
241
24
1
/
2
15
1
/
8
1701
2218
2
3
/
16
2
7
/
16
88
91
20
3,286
271
27
16
13
/
16
1463
1910
2
3
/
16
2
7
/
16
104
106
20
3,992
301
30
18
13
/
16
1316
1715
2
7
/
16
2
11
/
16
136
145
20
4,961
331
33
20
9
/
16
1202
1568
2
7
/
16
2
15
/
16
168
176
20
5,895
361
36
1
/
2
23
1
/
8
1055
1378
2
11
/
16
2
15
/
16
235
233
18
7,277
32
31
7
/
8
21
5
/
8
1300
1700
2
3
/
16
2
7
/
16
195
195
10
14,035
36
35
13
/
16
24
1250
1550
2
7
/
16
2
3
/
4
262
273
10
18,400
40
39
3
/
8
26
7
/
8
1200
1350
2
3
/
4
2
15
/
16
348
358
10
22,750
44
44
3
/
32
30
850
1150
2
15
/
16
3
3
/
16
441
459
10
28,650