The next step is to follow the vertical 15 m3/h line downwards until it
intersects the power curve for the 160 mm impeller. A horizontal line to the
left of the intersection indicates a power consumption of 2.3 kW. To this
figure a safety margin of approx. 15 % must be added, giving a total of approx. 2.6 kW. A 3 kW motor can consequently
be used.