How do we calculate?
Selection method of the booster pump manufacturer Baymak: flow Q = number of flats × people per flat × daily consumption per person × simultaneity factor (1-5 flats 0.66; 6-10 flats 0.45; 11-20 flats 0.40; 21-50 flats 0.35; 51-100 flats 0.30; over 100: 0.25). Head = number of floors × floor height × 1.15 + 15 m (1.15 for pipe and fitting losses, 15 m pressure for the fixtures on the top floor); the cut-out pressure is 20 m higher.
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This calculator is used in these sectors: Building services (HVAC & plumbing). All calculators →
Results are for preliminary selection and do not replace engineering design. Ask our technical team for the final selection.