Application
- Swirl diffusers for supply air and extract air in comfort zones
- A design feature for building owners and architects with high demands on architecture and design
- Horizontal swirling supply air discharge for mixing ventilation
- Efficient swirling airflow with high induction for rapid reduction of temperature differences and air velocity (supply air)
- For constant and variable volume flows
- For supply air to room air temperature differences of -12 – +10 K
- For rooms with heights up to 4 m (underside of suspended ceiling)
- For all types of ceiling systems
- Smaller swirl diffusers suitable for 600 or 625 ceiling grids
- With an extended border also suitable for freely suspended installation (supply air variant)
Special characteristics
- High induction results in a rapid reduction of the supply air to room air temperature difference and airflow velocity
- For all ceiling systems, and with an extended border also suitable for freely suspended installation
- Smaller swirl diffusers suitable for 600 or 625 ceiling grids
- Spigot horizontal and vertical
- Very high room air change rates possible thanks to row arrangement with a minimum centre-to-centre spacing of 0.9 m
Nominal sizes
300 x 8, 400 x 16, 500 x 24, 600 x 24, 600 x 48, 625 x 24, 625 x 54, 825 x 72
Variants
- VDW-Q: Square diffuser face
- VDW-R: Circular diffuser face
- VDW-*-Z: Supply air
- VDW-*-A: Extract air
Spigot
- H: horizontal spigot
- V: vertical spigot
Accessories
Lip seal
Note:
For circular plenum box with horizontal spigot: Lip seal only available in combination with damper blade
Attachments
- M: Damper element for volume flow rate balancing
- MN: Pressure tap and cord-operated damper unit for volume flow rate balancing with the diffuser face in place (only possible with square plenum box)
Construction features
- Spigot suitable for circular air ducts according to DIN EN 1506 or DIN EN 13180
- Spigots are always fitted with a groove for a lip seal
- Retrofitting of the lip seal is possible at a later stage
- Optional: Lip seal and damper blade are factory-fitted
- Simple installation of the diffuser face using a central fixing screw with cap
Square plenum box
- Spigot made of galvanised sheet steel
- Equalising element to ensure a uniform airflow through the diffuser face (supply air variant)
- Circular plenum box
- With vertical spigot: Spigot made of galvanised sheet steel
- With horizontal spigot: Spigot made of black ABS plastic
- Equalising element to ensure a uniform airflow through the diffuser face (supply air variant)
Materials and surfaces
Diffuser face
- Made of galvanised sheet steel
- Coated, RAL 9010, pure white (no entry)
- P1: powder-coated, RAL CLASSIC colour
Damper blade
Circular plenum box
- Made of galvanised sheet steel
- With vertical spigot
- Spigot made of galvanised sheet steel
- For supply air, with galvanised perforated plate for air distribution
- With horizontal spigot
- Spigot made of black ABS plastic, flame-retardant in accordance with UL94, V0
- Equipped with a polyester equalising element for supply air
- Crossbar made of galvanised sheet steel for mounting the diffuser face
Square plenum box
- Made of galvanised sheet steel
- With horizontal spigot
- Spigot made of galvanised sheet steel
- For supply air, with galvanised perforated plate for air distribution
- Crossbar made of galvanised sheet steel for mounting the diffuser face
Lip seal
Made of Evoprene
Air control blades
- Supply air:
- Similar to RAL 9005, jet black
- Made of plastic, UL 94, V- 0, flame-retardant
- Q21: Air control blades supply air similar to RAL 9010, pure white
Extract air:
- No air control blades
- Q11: Air control blades for extract air similar to RAL 9005, jet black
- Q21: Air control blades for extract air similar to RAL 9010, pure white
Standards and guidelines
- Spigot, suitable for air ducts according to DIN EN 1506 or DIN EN 13180
- Sound power level of the air-regenerated noise measured according to DIN EN ISO 5135
Maintenance
- Low maintenance as construction and materials are not subject to wear
- Inspection and cleaning to VDI 6022
Disclosure of Chemicals
RoHS EU Directive 2011/65/EU (RoHS)
- This product or single variants comply with EU Directive 2011/65/EU (RoHS) on the restriction of the use of certain hazardous substances in electrical and electronic equipment. For more information, please refer to our Environmental Product Declarations.
REACH 1907/2006 (EC Regulation REACH)
- This product or single variants comply with the provisions of EC Regulation No. 1907/2006, also known as REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals). For more nformation, please refer to our Environmental Product Declarations.
