External Single Direct And Belt Drive Fans (NALSRF)

NALSRF external roof mounted single fan, belt driven centrifugal fan is manufactured from aluzinc. Unit is suitable for operation in ambient temperature of 50°C and external installation of up to maximum angle of 5°.

Robust build quality with a performance range from 0.06-4m3/s for domestic, commercial or industrial.

Please note that this product can no longer be sold within the EU.

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Robust unit manufactured from high grade corrosive resistant aluzinc providing a hard wearing solution on site.

Features & Benefits:

  • Easy Installation - Variable spigot options
  • Quiet Solution – acoustically treated construction fitted with a forward curved centrifugal impeller
  • Wide Range of Ancillaries – Silencers (Long and Standard) and  flexi connectors
  • Suits all Duct Sizes - With a choice of 6 sizes and higher performance models also available

Roof mounted single fan unit for external use, with a high efficiency forward curved centrifugal impeller, sensors fitted in each scroll monitor air flow, detect and signal flow failure. Direct drive motors fitted with thermal protection and manufactured to BS5000. Class B insulation and sealed for life bearings. Air is discharged into a common outlet plenum chamber through separate shutter system which prevents blow back through the standby fan. Unit casing is manufactured from Aluzinc, the underside of the cover which encloses the inlet chamber is acoustically lined.

Fans are suitable for operation in ambient temperatures up to 60°C.  All units are suitable for internal and external use and may be installed up to a maximum angle of 5°.  (Care must be taken to ensure the back draught dampers operate correctly).

Note: fan sizes 1 - 15 are supplied with controls. Fan sizes 16-24 are not supplied with controls - refer to I&M manual.

  • Toilets - small and large
  • Small and large offices
  • Supermarkets
  • Plant room - Note: Fan sizes 1 - 15 are supplied with controls. Fan sizes 16-24 are not supplied with controls
  • Flexible connectors
  • Silencers - long, long podded, standard and standard podded
  • Anti-vibration mounts
  • Speed controls (direct drive only)