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 2121
II 2770
III 3488
Static Pressure (in. wg)
18
16
14
12
10
8
6
4
2
25
20
15
10
7½
5
3 3
2
30
DO NOT SELECT TO THE LEFT OF THIS SYSTEM CURVE
850 850
1200 1200
40
1500 1500
1800 1800
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
Inlet Sound Power, Lwi
RPM %WOV 1 2 3 4 5 6 7 8 L wi A
800 100 80 83 81 79 77 73 68 63 82
80 81 81 79 78 75 73 69 63 81
60 79 80 77 77 74 73 69 64 80
50 79 79 77 77 74 73 69 64 80
40 81 80 77 77 74 73 69 64 80
1100 100 83 86 88 83 80 77 71 66 86
80 81 86 86 81 78 75 71 66 84
60 80 84 84 79 77 74 71 66 82
50 84 84 83 78 77 74 71 66 82
40 88 85 83 78 77 74 71 66 82
1500 100 90 89 95 90 85 82 75 69 92
80 87 86 93 87 82 78 72 67 89
60 89 87 89 84 80 77 71 66 87
50 93 92 91 85 80 77 71 67 88
40 94 96 92 86 81 77 71 67 89
2000 100 96 93 100 96 91 89 83 76 98
80 93 90 99 93 88 85 78 73 95
60 94 91 95 90 86 82 76 72 92
50 98 97 97 92 86 82 76 72 94
40 99 100 99 93 87 83 76 72 95
2600 100 105 99 101 106 99 96 91 85 106
80 103 96 99 104 97 93 86 80 103
60 104 98 98 101 94 90 84 80 101
50 107 105 105 101 94 92 85 80 102
40 108 106 105 101 94 92 85 80 102
3488 100 110 108 106 111 109 104 100 94 113
80 108 106 104 109 106 101 95 89 110
60 109 107 104 106 104 98 93 88 108
50 112 113 111 106 104 99 94 88 109
40 113 114 112 106 104 99 94 88 109
2121 2121
Volume (cfm x 1000)
0 5 10 15 20 25 30 35 40 45
3
Volume (m /hr x 1000)
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.
53
50
2500 2500
60
50% WOV
2770 2770
3000 3000
60% WOV
3300 3300
3488 3488
Sound Power [dB Ref 10 -12 watts]
70% WOV
RPM
BHP
% WOV
Density 0.075 lb/ft 3
Density 1.2 kg/m 3
80% WOV
90% WOV
20 AFDW
% WOV = (CFM X 100) / (RPM X 7.91)
Outlet Sound Power, Lwo
RPM %WOV 1 2 3 4 5 6 7 8 L wo A
800 100 84 85 81 76 77 68 59 51 80
80 82 82 79 73 70 67 58 49 77
60 81 79 75 71 68 67 58 49 74
50 85 81 76 70 68 67 58 49 74
40 88 83 76 69 68 67 58 50 75
1100 100 88 93 88 83 82 76 67 59 86
80 85 93 87 79 78 72 65 57 84
60 86 86 82 76 74 70 64 56 80
50 95 89 82 75 73 70 64 57 80
40 98 92 84 76 74 70 64 57 82
1500 100 95 94 97 89 87 83 75 67 93
80 92 89 95 86 84 78 70 64 90
60 96 89 93 84 80 74 68 64 87
50 100 96 93 84 80 74 67 65 89
40 104 101 94 85 81 75 68 65 90
2000 100 102 98 99 96 95 90 84 76 99
80 99 94 97 92 91 86 78 72 96
60 102 96 95 90 88 82 75 73 93
50 107 102 99 91 89 82 76 73 95
40 109 105 100 92 90 83 77 73 97
2600 100 113 104 102 109 104 98 94 86 109
80 105 98 98 105 100 94 88 82 105
60 108 101 99 100 97 91 84 81 102
50 112 107 105 101 97 91 84 81 103
40 117 112 110 104 99 93 87 85 107
3488 100 118 114 109 114 112 107 102 96 116
80 110 108 104 110 109 103 97 91 112
60 113 111 106 106 105 100 93 88 109
50 117 116 112 106 105 100 93 89 110
40 122 121 117 109 108 102 96 92 114
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