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 1423
II 1855
III 2338
Static Pressure (in. wg)
18
16
14
12
10
8
6
4
2
BIDW-27
30
25
20
15
10
7½
5
3
2
40
50 60 75
800
600
1000
1200
1423
DO NOT SELECT TO THE LEFT OF THIS SYSTEM CURVE
0
0 5 10 15 20 25 30 35 40 45 50 55
Inlet Sound Power, Lwi
RPM %WOV 1 2 3 4 5 6 7 8 Lwi A
400 100 83 80 78 71 67 59 53 50 74
80 81 80 75 68 64 56 51 48 71
60 79 78 72 68 64 56 51 49 70
50 78 78 71 67 64 56 51 49 70
40 78 79 69 67 64 56 51 50 70
600 100 90 86 83 77 76 69 61 58 80
80 89 84 80 75 73 67 59 57 78
60 86 81 78 74 72 65 59 56 76
50 85 80 76 73 72 65 59 57 76
40 83 79 76 72 72 65 60 57 76
800 100 91 94 88 85 81 77 72 69 87
80 88 91 85 83 78 74 69 68 85
60 86 88 82 82 77 73 70 69 83
50 85 87 82 81 77 73 71 69 83
40 88 85 80 81 77 73 71 69 83
1200 100 96 96 102 94 91 89 84 81 98
80 94 93 98 91 88 84 81 79 94
60 91 90 94 88 85 81 80 79 91
50 93 89 93 87 85 81 81 79 91
40 93 89 92 86 85 81 80 79 90
1700 100 104 101 113 103 100 99 95 90 108
80 102 97 109 100 96 94 90 86 104
60 98 93 104 96 94 90 87 85 100
50 98 93 103 95 93 90 88 86 99
40 101 95 100 94 92 89 88 87 98
2338 100 110 111 115 115 108 106 104 99 116
80 107 108 111 111 105 102 98 94 112
60 103 104 107 107 102 99 95 93 108
50 103 104 106 106 101 98 95 94 107
40 107 106 105 104 99 97 96 94 106
Volume (cfm x 1000)
0 10 20 30 40 50 60 70 80 90
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.
1600
50% WOV
100
1855
2000
60% WOV
Sound Power [dB Ref 10 -12 watts]
2200
2338
70% WOV
80% WOV
90% WOV
29 ®
27 BIDW
% WOV = (CFM X 100) / (RPM X 21.6)
Outlet Sound Power, Lwo
RPM %WOV 1 2 3 4 5 6 7 8 LwoA 400 100 83 81 75 71 67 56 49 45 73
80 79 78 73 68 61 51 45 43 70
60 74 74 67 67 61 51 47 44 68
50 75 73 65 66 61 51 47 44 67
40 78 76 66 66 63 53 48 44 68
600 100 98 93 81 77 76 69 60 54 82
80 98 92 80 74 72 63 55 50 80
60 91 85 74 72 70 61 57 53 76
50 88 83 72 71 70 62 57 54 74
40 89 84 72 70 70 62 58 54 75
800 100 94 98 87 83 82 77 70 62 88
80 91 95 84 79 78 73 66 60 84
60 89 91 80 76 75 68 64 61 80
50 89 87 78 75 74 68 64 61 79
40 91 89 78 74 74 69 66 62 80
1200 100 101 101 102 95 93 89 85 77 99
80 97 97 98 91 89 84 78 72 95
60 94 94 95 87 85 79 76 73 91
50 94 94 94 85 83 79 76 73 90
40 96 94 93 85 83 79 77 74 89
1700 100 109 107 107 105 103 99 97 88 108
80 105 103 104 101 99 94 90 83 104
60 102 100 101 97 95 89 86 82 100
50 102 100 100 95 94 88 86 82 98
40 106 102 97 93 91 87 86 83 97
2338 100 114 115 114 113 111 108 105 99 116
80 111 111 110 109 107 103 99 93 112
60 107 108 108 106 103 99 94 90 108
50 107 108 107 104 101 97 94 91 107
40 112 111 106 102 99 96 93 91 105