Single-Width Centrifugal Fan Performance Supplement - Greenheck

Static Pressure (Pa x 100)
25
20
15
10
5
0
Class Max RPM
I 3274
II 4270
III 4300
IV NA
Static Pressure (in. wg)
12
10
8
6
4
2
BISW-12
3
2
1½
¾
½
1300
1800
2300
DO NOT SELECT TO THE LEFT OF THIS SYSTEM CURVE
Inlet Sound Power, Lwi
RPM %WOV 1 2 3 4 5 6 7 8 Lwi A
900 100 70 73 64 63 61 54 46 39 65
80 68 67 61 59 55 47 40 35 60
60 67 67 60 57 53 45 38 33 59
50 67 67 60 57 54 45 39 34 59
40 68 67 60 57 54 46 40 34 59
1300 100 75 78 77 71 67 66 58 50 74
80 74 76 75 67 63 59 52 45 71
60 74 73 69 66 65 58 54 47 69
50 74 73 70 66 66 59 55 50 70
40 78 80 75 69 68 60 57 51 73
1900 100 80 82 80 79 76 73 70 63 81
80 78 79 77 75 73 70 65 59 78
60 79 79 75 74 74 69 65 61 78
50 80 79 75 74 74 69 67 63 78
40 81 81 77 75 75 70 68 64 79
2600 100 89 88 85 90 84 79 78 74 90
80 84 85 81 87 81 76 74 69 87
60 83 84 79 83 80 76 74 70 85
50 84 84 80 83 81 77 76 72 85
40 87 87 82 85 81 78 77 73 86
3800 100 99 96 91 98 93 89 87 85 99
80 100 93 87 95 90 85 83 81 95
60 99 95 87 91 88 85 84 81 94
50 99 94 88 93 88 86 85 82 95
40 99 95 91 96 90 87 87 84 96
4300 100 101 99 95 100 97 92 89 88 101
80 102 97 91 96 93 89 86 84 98
60 101 99 91 93 91 88 87 84 96
50 100 98 92 95 92 89 88 85 97
40 101 99 95 98 94 90 89 87 99
1
3
¼
5 7½
40% WOV
2800
0
0 1 2 3 4 5
Volume (cfm x 1000)
0 2 4 6 8
3
Volume (m /hr x 1000)
Sound Power [dB Ref 10 -12 watts]
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.
21
3274
50% WOV
3800
4270
4300
60% WOV
70% WOV
80% WOV
90% WOV
®
12 BISW
% WOV = (CFM X 100) / (RPM X 1.06)
Outlet Sound Power, Lwo
RPM %WOV 1 2 3 4 5 6 7 8 LwoA 900 100 82 79 72 67 62 58 50 43 70
80 81 77 67 62 59 53 47 40 66
60 81 75 65 61 58 52 47 40 65
50 81 74 65 60 58 52 48 41 65
40 81 74 64 60 59 52 48 42 65
1300 100 86 83 81 76 69 67 61 53 78
80 83 81 78 74 66 62 56 49 75
60 83 79 75 69 64 59 56 49 72
50 84 79 74 68 63 59 56 50 71
40 90 81 75 68 63 59 56 50 72
1900 100 96 91 91 85 80 78 73 65 87
80 92 88 88 82 76 74 68 61 84
60 90 86 84 79 73 70 66 61 81
50 90 86 83 78 73 69 66 62 80
40 91 88 83 78 72 69 66 62 81
2600 100 102 96 94 101 89 86 82 76 99
80 99 93 90 95 85 82 77 71 94
60 97 92 88 92 82 79 74 70 91
50 97 92 88 90 82 78 74 70 90
40 98 97 89 90 81 78 74 71 90
3800 100 113 105 99 106 96 94 90 87 105
80 116 102 96 102 92 90 86 82 101
60 116 100 94 95 89 87 84 80 97
50 115 100 93 93 88 86 84 81 96
40 114 100 93 93 88 86 84 81 96
4300 100 115 109 102 107 100 97 93 90 107
80 118 107 99 103 96 93 89 85 104
60 118 105 97 97 93 90 87 83 100
50 117 105 96 96 92 89 87 84 99
40 116 105 96 95 91 88 87 84 99