Fan Law Calculator

STEP BY STEP

How to use fan law calculator

1. Check the input units and assumptions.
2. Review the result and example.

IN PRACTICE

Example

1000 → 1200 RPM; 1000 m³/h → 1200 m³/h; 100 Pa → 144 Pa; 1 kW → 1.728 kW.

GOOD TO KNOW

How is this result calculated?

r = RPM₂/RPM₁; Q₂ = Q₁ × r; ΔP₂ = ΔP₁ × r²; Power₂ = Power₁ × r³. Same fan diameter, air density and efficiency assumed. Similar operating points only; check fan curve, motor capacity and maximum speed.