Shaded values show where Class I fan selections are more efficient than Class II.
Inlet Sound Power, L
RPM
% WOV
1
2
100
86
80
77
80
83
77
75
300
60
81
74
73
50
80
73
72
100
95
90
88
80
93
87
86
450
60
90
83
82
50
91
84
81
100
96
98
96
80
94
95
94
600
60
91
91
90
50
92
91
89
100
98
103 103
80
95
101 100
750
60
93
97
96
50
94
97
95
100
100 105 106 102 100 101
80
96
102 103 100
840
60
95
99
99
50
97
100
98
Performance certified is for installation type B: Free inlet, Ducted outlet. Power rating (Bhp) does not include transmission losses. Performance ratings do not
include the effects of appurtenances (accessories).
The sound power level ratings shown are in decibels, referred to 10
L
A sound power levels for installation type B: Free inlet, Ducted outlet. Ratings for inlet sound do not include the effects of duct end correction. Ratings for outlet
Wo
sound include the effects of duct end correction. The A-weighted sound power ratings shown have been calculated per AMCA Standard 301. The AMCA Certified
Ratings Seal applies to L
A and L
Wi
Wo
840
405T
15 hp
11 kW
73 in.
1854 mm
1905 kg.
3
STATIC PRESSURE (inches wg)
1
2
3
BHP
RPM
BHP
RPM
9.20
436
17.6
507
10.6
455
19.6
520
12.6
479
21.9
537
14.8
504
24.6
557
17.4
531
27.6
580
20.4
559
31.1
605
23.8
588
35.0
631
27.5
617
39.3
658
31.8
647
44.1
687
36.5
678
49.4
715
41.7
710
55.3
745
47.5
742
61.7
774
[dB ref 10
watts]
-12
Wi
3
4
5
6
7
8
L
Wi
78
76
64
56
49
79
75
69
60
52
44
75
75
68
59
52
45
74
74
67
59
52
45
74
86
89
79
70
61
91
84
79
72
65
58
85
82
78
72
65
59
83
81
77
70
65
61
82
93
93
91
80
66
98
91
86
81
73
66
92
88
84
79
73
67
90
87
83
78
74
69
89
99
97
99
89
73
104
96
92
88
81
72
98
93
90
86
80
74
95
92
89
85
81
76
95
94
78
107
95
91
85
76
101
96
93
89
84
78
99
95
92
89
84
79
98
-12
watts, calculated per AMCA Standard 301. Values shown are for inlet L