14
Rev. 2 – 10
th
November2015
3) With more fans regulated through the same potentiometer the previous formula becomes:
&
'
:;7
9
./
6
:;B7
9
!B7
9
9
In figure 16 is shown the behavior of N fans installed din parallel.
Fig.16 – Effect of N fans in parallel
Fan performance curve description
The DDMP fans are tested with an installation type “B”: FREE INLET – DUCTED OUTLET.
In Fig. 17 is shown how the performances are affected by changing the fan speed and the fan load.
Fig.17 – Fan behavior by changing speed or load
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