Type VD

For high rooms, with adjustable air control blades

Square ceiling swirl diffusers, with manual or motorised adjustment of the air pattern to ensure draught-free ventilation of the occupied zone both in heating and cooling modes

  • Nominal sizes 425, 600, 775, 1050
  • Volume flow rate range 95 – 1490 l/s or 342 – 5364 m³/h
  • Diffuser face made of aluminium with anodised finish
  • For supply air
  • For variable and constant volume flows
  • High induction results in a rapid reduction of the temperature difference and airflow velocity
  • Discharge direction can be adjusted manually or with an actuator
  • Ideal for high rooms


Optional equipment and accessories

  • Exposed diffuser face available in RAL CLASSIC colours
  • Horizontal or vertical duct connection
  • An extended border improves the horizontal air discharge in cooling mode
  • Protective cage for use in gymnasiums
  • Actuators for adjusting the air discharge direction

VD 00137242_0


  • Application
  • Description

Application

  • Type VD ceiling swirl diffusers are used as supply air diffusers for high rooms in comfort and industrial zones
  • For production halls, gymnasiums, theatres and conference rooms as well as for large internal spaces in airports, railway stations and shopping centres
  • For mixed flow ventilation with different air patterns in heating and cooling modes
  • Horizontal swirling supply air discharge in cooling mode
  • The efficient swirl creates high induction levels, thereby rapidly reducing the temperature difference and airflow velocity
  • Angled or vertical air discharge in heating mode
  • For variable and constant volume flows
  • For supply air to room air temperature differences from –12 to +15 K
  • For room heights exceeding 3.8 m
  • With freely suspended installation, an extended border supports the horizontal air discharge in cooling mode

Special characteristics

  • With adjustable air control blades for high rooms
  • The air pattern can be adjusted manually or with an actuator
  • Horizontal or vertical duct connection

Nominal sizes

  • 425, 600, 775, 1050

Variants

  • Diffuser face only


Connection

  • H: Horizontal duct connection
  • V: Vertical duct connection

Parts and characteristics

  • Square diffuser face with four sections of blades
  • Diffuser face with blades that can be adjusted simultaneously, for air discharge from horizontal (0°) to vertical (90°)
  • Plenum box for horizontal or vertical duct connection

Accessories

  • Electric actuators for adjusting the air discharge direction
  • Extended border and protective cage

Useful additions

  • TDC temperature difference control module

Construction features

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

Materials and surfaces

  • Diffuser face made of extruded aluminium sections
  • Plenum box, cross bar and extended border made of galvanised sheet steel
  • Protective cage made of steel mesh
  • Diffuser face with anodised finish, E6-C-0, natural colour
  • Protective cage powder-coated RAL 9010, pure white
  • Extended border powder-coated RAL 9006, white aluminium
  • 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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