VD

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