43
9.7.2.1 - Air pressure drops (Pa) for octopus plenum boxes as a function of the number of spigots (200 mm Ø)
Sizes 2.1, 2.2, 2.3, 3.1, 3.2 and 3.3
Air flow (m
3
/h)
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
Air flow (l/s)
0
28
56
83
111
139
167
194
222
250
278
305
333
361
389
417
2 spigots
SUP
0
0.9
3.5
7.9
14.0
21.8
31.4
RET
0
0.7
2.7
8.1
10.9
17.1
24.6
3 spigots
SUP
0
0.2
0.7
1.6
2.9
4.5
6.5
6.9
116
14.7
18.1
21.9
RET
0
0.2
0.7
1.7
3.0
4.6
6.7
9.1
11.9
15.0
18.6
22.5
4 spigots
SUP
0
0
0.2
0.4
0.7
1.1
1.6
2.1
2.8
3.5
4.3
5.2
5.2
7.3
8.5
9.7
RET
0
0.1
0.3
0.8
1.4
2.1
3.0
4.1
5.4
6.8
8.5
10.2
12.2
14.3
16.6
19.0
5 spigots
SUP
0
0
0.1
0.3
0.5
07
1.0
1.4
1.8
2.3
2.9
3.5
4.1
4.9
5.6
6.5
RET
0
0
0.2
0.4
0.7
1.1
1.6
2.1
2.8
3.5
4.3
5.3
6.3
7.3
8.5
9.8
Legend:
SUP supply
RET
return
9.7.3 - Pressure drops (Pa) for return air sound dampers
Air flow (m
3
/h)
100
300
500
700
900
1000
1100
1200
1300
Air flow (l/s)
28
83
139
194
250
278
305
333
361
Sound damper T1
0
1
3
7
11
-
-
-
-
Sound damper T2 and T3
0
0.5
1
2
3
3.5
4
5
6