S&P CRHB/4-225 N 225mm Roof-Mounted Fan

The S&P CRHB/4-225 N 225 mm Roof-Mounted Fan is a compact centrifugal roof ventilation unit designed for reliable airflow in commercial and industrial buildings. It features a horizontal discharge design with a very low-profile structure, making it ideal for roof installations where height is limited. The fan uses a high-efficiency backward-curved impeller and an external rotor motor for strong airflow and energy-efficient operation. Built with a galvanised steel base and aluminium weather cowl, the unit provides durable protection against outdoor conditions and long-term ventilation performance.

Material & Build Quality

• Base: Galvanised sheet steel construction for durability.

• Cowl: Spun aluminium weather protection hood.

• Impeller: High-efficiency backward-curved centrifugal impeller (plastic on smaller models).

• Motor: External rotor motor with thermal overload protection.

• Guard: Steel bird-proof safety guard to protect the impeller.

Specifications

• Product Type: Centrifugal Roof-Mounted Fan (CRHB Series)

• Model: CRHB/4-225 N

• Fan Diameter: 225 mm

• Discharge Type: Horizontal roof discharge

• Motor Type: External rotor AC motor

• Voltage: 230 V / 50–60 Hz (Single Phase)

• Protection Rating: IP54, insulation class F

• Max Airflow: Approx. 740 m³/h

• Speed: Approx. 1400 rpm

• Max Temperature: Up to 70 °C continuous operation

• Noise Level: Approx. 42 dB(A)

• Installation: Roof mounted on flat or mounting base

• Applications: Commercial buildings, warehouses, factories, workshops, and general HVAC extraction systems