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www.DaikinApplied.com 25
IM 777-8 • Skyline Air Handler
Figure 41: Wheel-to-Inlet Funnel Relationship—In-line
Fans
Table 11: Wheel-to-Inlet Funnel Relationship—In-line Fans
Wheel—Funnel Overlap
in . (mm)
Size – in .
Overlap
150
0.375 (9.52)
165
0.438 (11.12)
182
0.562 (14.27)
200
0.625 (15.87)
222
0.688 (17.47)
245
0.75 (19.05)
270
0.812 (20.62)
300
0.875 (22.22)
330
1.0 (25.4)
365
1.125 (28.57)
402
1.25 (31.75)
445
1.375 (34.92)
Table 12: Wheel to Inlet Funnel Relationship—Direct-Drive
Class II fans
Fan Size – in .
Overlap – in . (mm)
11
0.25 (6.35)
12
0.25 (6.35)
15
0.25 (6.35)
16
0.38 (9.65)
18
0.38 (9.65)
20
0.41 (10.41)
22
0.45 (11.43)
24
0.50 (12.7)
27
0.55 (13.97)
30
0.61 (15.49)
33
0.67 (17.0)
36
0.75 (19.05)
40
0.82 (20.82)
44
0.91 (23.11)
Table 13: Wheel to Inlet Funnel Relationship—Direct-Drive
Class III fans
Fan Size – in .
Overlap – in . (mm)
13
0.12 (3.0)
15
0.19 (4.82)
16
0.25 (6.35)
18
0.31 (7.87)
20
0.38 (9.652)
22
0.44 (11.17)
24
0.50 (12.7)
27
0.56 (14.22)
30
0.62 (16.76)
33
0.75 (19.05)
36
0.81 (20.57)
40
0.88 (22.35)
44
0.94 (23.87)
49
1.0 (25.4)
54
1.06 (26.92)
60
1.12 (28.44)
Figure 42: Fan Wheel Rotation
