VDL

Application

• Type VDL 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

• For high rooms, with adjustable air control blades
• Diffuser face with aerodynamically optimised contours
• The air pattern can be adjusted manually or with an actuator
• Horizontal or vertical duct connection

Nominal sizes

• 315, 400, 630, 800

Variants

• A: Diffuser face without flange
• B: Diffuser face with flange

Connection

• F: Diffuser face only
• H: Horizontal duct connection, with plenum box
• V: Vertical duct connection, with plenum box

Diffuser face

• N: Non-removable diffuser face
• D: Removable diffuser face, only in variant with plenum box

Parts and characteristics

• Circular diffuser face
• Removable or non-removable diffuser face
• Radially arranged fixed or adjustable blades for air discharge from horizontal (0°) to vertical (90°)
• Diffuser face with or without flange
• Adjustment mechanism covered by decorative cap

Accessories

• Lip seal
• 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
• Spigot with groove for lip seal (if accessory lip seal has been ordered)

Materials and surfaces

• Blades, casing, extended border, plenum box or spigot and cross bar made of galvanised sheet steel
• Quick release fastener made of nylon and rubber IR/BR
  
• Seal made of rubber NR
  
• Spacers made of HD-PE
  
• Diffuser face and decorative cap made of aluminium
• Protective cage made of steel mesh
• Blades, extended border, diffuser face and decorative cap 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