Roof Mounted Centrifugal Extractor Fans
CRF
![CRF](https://d7rh5s3nxmpy4.cloudfront.net/CMP2671/PR1815BI4110_1000000558_CRF_SZ4.png)
Centrifugal roof fans with low noise level
![](https://d7rh5s3nxmpy4.cloudfront.net/CMP2671/2/picto_sod_according_erp.png)
Centrifugal roof fans with low noise and external rotor motor.
Fan:
• Galvanised steel sheet construction.
• Backward curved impeller made of aluminium sheet metal except for models 225 and 250, which are made of galvanised sheet steel.
• Bird protection grid.
• Folding body for ease of inspection and maintenance.
Motor:
• Class F motors. External rotor and IP54 protection.
• Single-phase 230 V 50/60 Hz, except models 450 and 500, 230 V 50 Hz.
• Three-phase 400 V 50/60 Hz, except models 450 and 500, 400 V 50 Hz.
• Working temperature: -25 ºC +50 ºC.
Finish:
• Galvanised steel sheet.
On request:
• The variable speed drive (VSD) is supplied on request.
Fan:
• Galvanised steel sheet construction.
• Backward curved impeller made of aluminium sheet metal except for models 225 and 250, which are made of galvanised sheet steel.
• Bird protection grid.
• Folding body for ease of inspection and maintenance.
Motor:
• Class F motors. External rotor and IP54 protection.
• Single-phase 230 V 50/60 Hz, except models 450 and 500, 230 V 50 Hz.
• Three-phase 400 V 50/60 Hz, except models 450 and 500, 400 V 50 Hz.
• Working temperature: -25 ºC +50 ºC.
Finish:
• Galvanised steel sheet.
On request:
• The variable speed drive (VSD) is supplied on request.