Double-Width Centrifugal Fan Performance Supplement - Greenheck

Static Pressure (Pa x 100)
40
35
30
25
20
15
10
5
0
Class Max RPM
I 1568
II 2045
III 2577
Static Pressure (in. wg)
18
16
14
12
10
8
6
4
2
BIDW-24
30
25
20
15
10
7½
5
3
2
40
DO NOT SELECT TO THE LEFT OF THIS SYSTEM CURVE
700
50 60
900
1100
1300
0
0 4 8 12 16 20 24 28 32 36 40 44
Inlet Sound Power, Lwi
RPM %WOV 1 2 3 4 5 6 7 8 Lwi A
450 100 81 80 78 72 67 60 53 50 74
80 80 80 76 68 64 57 51 48 72
60 77 78 73 68 64 57 52 49 70
50 77 78 71 68 64 57 52 49 70
40 77 78 70 67 64 57 52 49 70
650 100 88 87 82 76 74 69 61 57 80
80 87 85 79 74 72 66 59 56 78
60 84 82 77 73 71 64 58 55 76
50 83 81 76 72 71 64 59 56 75
40 81 80 75 72 71 65 59 57 75
900 100 90 94 88 85 81 78 72 69 87
80 87 91 85 83 79 74 69 68 85
60 85 87 82 82 78 73 70 69 83
50 85 86 81 82 77 73 70 69 83
40 88 85 80 81 77 73 71 69 83
1300 100 95 94 101 94 90 88 84 80 97
80 92 91 98 90 87 83 80 78 94
60 90 88 93 87 84 80 79 78 90
50 92 87 92 86 84 80 79 78 90
40 92 88 91 85 84 80 79 78 89
1800 100 102 99 110 102 99 97 94 88 106
80 99 96 106 99 95 92 88 84 102
60 95 92 102 95 92 89 86 83 98
50 95 92 100 94 91 88 86 84 98
40 99 94 98 93 90 88 86 85 96
2577 100 108 111 112 116 108 106 103 99 115
80 106 108 108 112 105 101 98 94 112
60 101 104 104 108 101 98 95 92 108
50 101 104 104 106 100 98 95 93 107
40 105 107 104 104 99 97 95 94 106
Volume (cfm x 1000)
0 10 20 30 40 50 60 70
3
Volume (m /hr x 1000)
RPM
BHP
% WOV
Density 0.075 lb/ft 3
Density 1.2 kg/m 3
The sound power level ratings shown are in decibels, referred to 10 -12 watts calculated per AMCA Standard 301. Values shown are for inlet Lwi, LwiA and outlet
Lwo, LwoA sound power levels for Installation Type B: free inlet, ducted outlet. Outlet ratings include the effects of duct end correction. The A-weighted sound
ratings shown have been calculated per AMCA International Standard 301.
1568
50% WOV
100
75
60% WOV
1800
Sound Power [dB Ref 10 -12 watts]
2045
2200
2400
2577
70% WOV
80% WOV
90% WOV
27 ®
24 BIDW
% WOV = (CFM X 100) / (RPM X 16.1)
Outlet Sound Power, Lwo
RPM %WOV 1 2 3 4 5 6 7 8 LwoA 450 100 82 81 76 71 67 58 50 45 73
80 78 78 73 68 62 52 45 43 70
60 73 73 68 67 62 52 47 44 68
50 74 73 66 66 62 53 47 44 67
40 77 76 67 65 63 54 48 44 68
650 100 97 93 81 76 75 68 60 53 82
80 97 92 80 74 71 63 55 50 80
60 90 86 74 71 69 61 56 52 75
50 87 83 72 70 69 61 57 53 74
40 88 84 72 69 69 61 57 53 74
900 100 93 97 88 83 82 78 71 63 88
80 90 95 84 79 78 73 67 61 84
60 88 91 81 76 75 69 64 61 81
50 88 87 79 75 74 68 65 61 79
40 91 89 79 74 74 70 66 62 80
1300 100 100 100 101 94 92 89 84 77 98
80 96 96 97 91 88 83 78 71 94
60 92 93 95 86 84 79 75 72 90
50 93 93 94 85 83 78 75 72 89
40 95 94 92 84 82 78 76 73 88
1800 100 107 106 105 103 101 98 95 87 106
80 103 101 102 99 97 93 88 82 102
60 100 99 99 95 94 88 85 80 98
50 100 99 98 94 92 87 84 80 97
40 104 101 96 92 90 85 85 81 95
2577 100 113 114 113 112 110 108 104 100 115
80 110 111 109 109 106 103 98 93 111
60 106 107 107 106 102 99 94 90 107
50 106 107 106 104 100 97 93 90 106
40 110 111 106 102 98 95 93 91 105