Type RFD

With low sound power level for comfort and industrial zones, with fixed air control blades

Circular and square ceiling swirl diffusers

  • Nominal sizes 125, 160, 200, 250, 315, 400
  • Volume flow rate range 4 – 330 l/s or 14 – 1188 m³/h
  • Diffuser face made of galvanised sheet steel, powder-coated, or of aluminium (depending on variant)
  • For supply and extract air
  • For variable and constant volume flows
  • For all types of ceiling systems
  • With discharge nozzle ideal for cooling in case of freely suspended installation
  • High induction results in a rapid reduction of the temperature difference and airflow velocity
  • Air change rates of up to 35 per hour can be achieved by arranging several diffusers in a row with a minimum pitch of 0.9 m (centre line to centre line)
  • Ideal for comfort zones


Optional equipment and accessories

  • Exposed diffuser face available in RAL CLASSIC colours
  • Horizontal or vertical duct connection
  • Plenum box with cord-operated damper blade and pressure tap
  • Shallow plenum box

RFD-SIRIUS-Q-D 00132669_0


  • Application
  • Description

Application

  • Type RFD 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 to +10 K
  • For room heights up to 4 m (lower edge of suspended ceiling)
  • For all types of ceiling systems
  • With an extended border and discharge nozzle also suitable for freely suspended installation (supply air variant)

Special characteristics

  • Low sound power level, ideal for comfort zones
  • Fixed blades
  • For all types of ceiling systems
  • Horizontal or vertical duct connection
  • Air change rates of up to 35 per hour can be achieved by arranging several diffusers in a row with a minimum pitch of 0.9 m (centre line to centre line)

Nominal sizes

  • 125, 160, 200, 250, 315, 400

Variants

  • RFD-Q: Square diffuser face
  • RFD-R: Circular diffuser face
  • RFD-*-D: Diffuser face with discharge nozzle


Connection

  • K: Vertical duct connection, with duct collar
  • US: Vertical duct connection, with transition piece
  • A: Horizontal duct connection, with plenum box


Only RFD-R

  • UO: Vertical duct connection, with transition piece and cross bar


Only RFD-R-D

  • UD: Vertical duct connection, with transition piece, cross bar and discharge nozzle
  • N: Horizontal duct connection, with shallow plenum box to be installed above open cell ceilings

Parts and characteristics

  • Circular or square diffuser face
  • Diffuser face with radially arranged fixed air control blades

Attachments

  • M: Damper blade for volume flow rate balancing
  • MN: Pressure tap and cord-operated damper blade for volume flow rate balancing with the diffuser face in place

Accessories

  • Lip seal

Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Spigot with groove for lip seal (if accessory lip seal has been ordered)

Materials and surfaces

  • Q: Diffuser face made of aluminium
  • R: Diffuser face made of galvanised sheet steel
  • Plenum box, duct collar and cross bar made of galvanised sheet steel
  • Transition piece made of aluminium
  • Lip seal made of rubber
  • 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

  • Maintenance-free as construction and materials are not subject to wear
  • Inspection and cleaning to VDI 6022

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Tel.: +39 029829741 | Fax: +39 029829760