Shaded values show where Class I fan selections are more efficient than Class II.
Inlet Sound Power, L
RPM
% WOV
1
2
100
68
74
80
65
70
700
60
64
68
50
76
72
100
72
80
80
64
75
1000
60
65
74
50
68
74
100
79
80
80
73
77
1450
60
75
77
50
78
78
100
82
86
80
76
80
2000
60
81
83
50
84
84
100
88
89
80
82
85
2517
60
86
87
50
89
90
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
2517
254T
1/3 hp
.25 kW
24.5 in.
622 mm
163 kg.
3
1
2
BHP
RPM
BHP
RPM
1.14
1319
2.05
1526
1.34
1384
2.34
1570
1.58
1451
2.67
1615
1.86
1519
2.99
1679
2.18
1589
3.32
1745
2.54
1670
3.74
1813
2.95
1751
4.20
1882
3.40
1834
4.72
1953
3.91
1918
5.28
2033
4.48
2003
5.90
2115
5.10
2092
6.59
2197
5.78
2181
7.34
2280
[dB ref 10
watts]
-12
Wi
3
4
5
6
7
8
L
Wi
67
66
64
62
49
42
69
64
63
62
60
49
39
66
62
61
62
61
51
40
66
68
65
62
60
48
40
68
73
72
70
71
60
51
76
69
68
67
65
56
48
72
67
67
66
65
57
49
71
68
66
65
65
56
49
71
82
81
79
77
79
63
85
77
76
75
73
67
59
79
75
73
72
72
67
61
78
77
74
72
71
67
61
78
91
89
87
85
87
78
93
85
84
83
80
76
69
87
85
81
80
78
75
71
86
85
82
79
78
75
71
85
90
94
94
90
92
87
99
86
90
91
87
82
76
94
85
89
87
85
80
76
92
90
89
87
85
80
77
92
-12
watts, calculated per AMCA Standard 301. Values shown are for inlet L