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RFD-Q-D


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Circular diffuser face

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With air outlet nozzle

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Without air outlet nozzle

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Horizontal swirling air discharge

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00134479_0
00128770_0
00128765_0
00144729_0

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 constant and variable 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

General information

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)


Technical data
  • Nominal sizes: 125, 160, 200, 250, 315, 400 mm
  • Minimum volume flow rate, with ΔtZ = –6 K: 4 – 36 l/s or 14 – 130 m³ /h
  • Maximum volume flow rate, with LWA ≅ 50 dB(A): 22 – 330 l/s or 79 – 1188 m³ /h
  • Supply air to room air temperature difference: –12 to +10 K


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 and tear
  • Inspection and cleaning according to VDI 6022


Downloads

informazioni di prodotto

  • Product data sheet Type RFD

    RFD_PD_2024_06_19_DE_en Product data sheet 31 MB pdf

certificati

  • Declaration of hygiene conformity Ceiling Swirl Diffusers Types FD, RFD, FDE

    HC/FD/RFD/FDE/DE/en Declaration of hygiene conformity 140 KB pdf

  • Environmental Product Declaration RFD

    RFD_EPD_2024_03_DE_en Environmental Product Declarations 380 KB pdf

  • Non-CE Manufacturer's statement RFD

    RFD_NotCE_2022_02_08_14_21_59_DE_en Certificate 1,8 MB pdf

manuali d'uso

  • Installation manual Ceiling diffusers

    A00000054447 Installation manual 520 KB pdf

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