The duct fans in this category feature rectangular duct connections and are available in uninsulated and insulated versions. They have fan wheels with backward or forward curved centrifugal impellers.

• Low profile duct fan with circular connections.
  · A small and useful duct fan which are perfect for spaces with minimum height clearance.
  · With one connection on the inlet side.
  · High capacity and efficiency with low sound levels.
  · Operational in both 50 and 60 Hz.
  · Impeller with backward curved blades.
  · The external rotor motor has maintenance-free sealed ball-bearings.
  · Integrated motor protection.
  · Junction box has enclosure class IP 54.
  · For speed control a transformer or electronic speed controller can be connected.
  · Fan housing is manufactured from galvanized sheet steel.
  · Duct connections are equipped with rubber seals.
  · The fan is intended to be installed in a duct system.
  · A duct connected fan can be installed outside or in damp environments.
  · The mounting brackets simplify installation in any position.