CENTRAL STATION AIR HANDLING UNITS
 
   TABLE 4  
SOUND ATTENUATORS  
UNIT SIZE 026 033 048 064 090 103
Nominal Air Volume                          m3/s
0,72
0,92
1,35
1,78
2,5
2,86
WIDTH                                                mm
965
1020
1320
1470
1620
1676
HEIGHT                                               mm
660
780
780
950
1050
1150
LENGTH - at fan discharge side        mm
1500
1500
1500
1500
1500
1500
LENGTH - at fan suction side            mm
900
900
900
900
900
900
AIRWAY                                       'A' mm
75
75
100
100
100
100
SPLITTER WIDTH                           'Â' mm
200
200
200
200
200
200
NUMBER OF SPLITTERS
3
3
4
4
5
5
AIR VELOCITY THROUGH AIRWAY m/s
5,44
4,84
5,25
4,16
5,72
5,27
PRESSURE DROP                               Pa
22
25
15
17
17
18
FREQUENCY
Hz ATTENUATION in dB
63
6
6
5
5
5
5
125
11
11
9
9
9
9
250
19
19
16
16
16
16
500
34
34
30
30
30
30
1000
45
45
39
39
39
39
2000
45
45
39
39
39
39
4000
39
39
31
31
31
31
8000
28
28
26
26
26
26
UNIT SIZE 119 143 171 206 240 284
Nominal Air Volume                          m3/s
3,31
3,95
4,75
5,74
6,68
7,89
WIDTH                                                mm
1880
2060
2120
2195
2590
2590
HEIGHT                                               mm
1150
1168
1321
1524
1524
1676
LENGTH - at fan discharge side        mm
1500
1500
1500
1500
1500
1500
LENGTH - at fan suction side            mm
900
900
900
900
900
900
AIRWAY                                       'A' mm
100
100
100
100
100
150
SPLITTER WIDTH                           'Â' mm
200
200
200
200
200
200
NUMBER OF SPLITTERS
6
6
7
7
8
8
AIR VELOCITY THROUGH AIRWAY m/s
6,06
5,29
6,59
6,16
6,19
5,82
PRESSURE DROP                               Pa
24
21
21
23
31
35
FREQUENCY
Hz ATTENUATION in dB
63
5
5
5
5
5
5
125
9
9
9
9
9
9
250
16
16
16
16
16
16
500
30
30
30
30
30
30
1000
39
39
39
39
39
39
2000
39
39
39
39
39
39
4000
31
31
31
31
31
31
8000
26
26
26
26
26
26