Centrifugal fans type H,HR and HS are designed for heavy duty industrial applications with medium-low flow rate and where the complete reliability is considered essential.

Usual design conditions are:

1. volumetric flowrate up to 250.000 m3/h for H series, 150.000 m3/h for HR series and 100.000 m3/h for HS series
2. static pressure up to 2.000 mmH2O
3. installed power up to 2.000 kW for H series and 1000 kW for HR and HS series