6.3 System curves
A system requires different pressures at different air flows, which can be represented by a system curve.
The intersection between the system line and the fan curve, is the unit's working point. It is showing the
air flow the system is going to have. Every change in the pressure of the ventilation system, will give
rise to a new system curve.
The K-factor is a constant that is the same through out one and the same system curve. If the K-factor and
the system pressure is known, the air flow can be calculated. If the real pressure drop in the system is
larger or smaller than calculated, the working point and the air flow will be different than expected.
6.3.1 VSR300 Supply air, F7 type filter
0
100
200
300
400
500
600
700
0
20
40
60
80
100
120
P
a
l
/
s
10V
6,9V
4,9V
2,8V
1
2
3
4
5
6
7
8
9
10
Fig. 6 Supply air system curves, F7 type filter
System curve
K-factor [l/s]
1
17,12
2
9,82
3
6,92
4
5,33
5
4,18
6
3,31
7
2,59
8
2,02
9
1,54
10
1,12
SAVE VSR 300/500
Installation and Service
208115
14
Systemair AB
Summary of Contents for SAVE VSR 300
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