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FD-Q

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Circular diffuser faces with circular plenum box

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Square diffuser face with square plenum box

Square diffuser face with square plenum box

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Circular diffuser face with circular plenum box and top entry spigot 

 

 

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Horizontal swirling air discharge

Horizontal swirling air discharge

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FD    

For comfort zones, with fixed air control blades

Circular and square ceiling swirl diffusers that create high induction levels, for high room air change rates


  • Nominal sizes 300, 400, 500, 600, 625
  • Volume flow rate range 9 – 235 l/s or 31 – 846 m³/h
  • Diffuser face made of galvanised sheet steel, powder-coated
  • For supply and extract air
  • For variable and constant volume flows
  • For all types of ceiling systems, and with an extended border also suitable for freely suspended installation
  • High induction results in a rapid reduction of the temperature difference and airflow velocity
  • Very high room air change rate possible thanks to row arrangement with a minimum pitch distance of 0.9 m
  • Ideal for comfort zones
  • Circular diffuser faces can be easily mounted without tools in a circular plenum box with horizontal spigot

 


Optional equipment and accessories


  • Exposed diffuser face available in RAL CLASSIC colours
  • Square plenum box with cord-operated damper unit and pressure tap

General information

Application

  • Ceiling swirl diffusers are used as supply air or extract air diffusers for comfort zones
  • Attractive design element for building owners and architects with demanding aesthetic requirements
  • Horizontal swirling supply air discharge for mixed flow ventilation
  • The efficient swirl creates high induction levels, thereby rapidly reducing the temperature difference and airflow velocity (supply air variant)
  • For variable and constant volume flows
  • For supply air to room air temperature differences from -12 – +10 K
  • For room heights up to 4 m (lower edge of suspended ceiling)
  • For all types of ceiling systems
  • With an extended border also suitable for freely suspended installation (supply air variant)



Special features

  • High induction results in a rapid reduction of the supply air to room air temperature difference and airflow velocity
  • For all types of ceiling systems, and with an extended border also suitable for freely suspended installation
  • Horizontal or vertical duct connection
  • Very high room air change rate possible thanks to row arrangement with a minimum pitch distance of 0.9 m



Nominal sizes

  • 300, 400, 500, 600, 625


Variants

  • FD-Q: square diffuser face
  • FD-R: circular diffuser face
  • FD-*-Z: Supply air
  • FD-*-A: Extract air


Connection



  • H: horizontal duct connection
  • V: vertical duct connection


Accessories

Lip seal

  • For circular plenum boxes with horizontal connection spigot, the lip seal is only available in combination with the flow adjustment damper. Otherwise, it can always be selected optionally.



Attachments

  • M: Damper element for volume flow rate balancing
  • MN: Pressure tap and cord-operated damper unit for volume flow rate balancing with the diffuser face in place (only possible with square plenum box)



Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180

Square plenum boxes and plenum boxes with vertical connection

  • With spigot made of galvanised sheet steel
  • Groove only available if lip density characteristic has been selected

Circular plenum boxes with horizontal spigot for nominal sizes 250, 400L, 400H and 600

  • Spigot made of black ABS
  • Spigots are fitted with a groove for a lip seal
  • Retrofitting of the lip seal is possible at a later stage
  • Damper blade and lip seal (optional) are factory fitted
  • Plenum box for supply air, with an optimised equalising element that ensures a uniform airflow through the diffuser face
  • Simple installation of the diffuser face due to central fixing screw with cap
  • Plenum box for supply air, with an optimised equalising element that ensures a uniform airflow through the diffuser face
  • Simple installation of the diffuser face due to central fixing screw with decorative cap


Materials and surfaces

  • Grille face made of galvanised sheet steel
  • Q; R: Plenum box made of galvanised sheet steel including galvanised sheet steel cross bar to support the diffuser face
  • Plenum boxes with vertical connection and square plenum boxes with horizontal connection: for supply air always with galvanised perforated plate for air distribution
  • Circular plenum boxes with horizontal spigot: Equipped as a plenum box for supply air with an equalising element made of polyester
  • Square plenum boxes and plenum boxes with vertical spigot: Spigot made of galvanised sheet steel
  • Circular plenum boxes with horizontal spigot: Spigot made of black ABS, according to UL94, V0 flame retardant
  • Lip seal made of Evoprene
  • Diffuser face powder-coated, RAL 9010, pure white
  • P1: Powder-coated, RAL Classic colour


Standards and guidelines

  • Sound power level of the air-regenerated noise measured according to EN ISO 5135

Maintenance

  • Low maintenance as construction and materials are not subject to wear
  • Inspection and cleaning to VDI 6022



Downloads

product information

brochures

certificates

operation manuals

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