FD

• 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)
  
  

• 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, 400, 500, 600, 625

• FD-Q: square diffuser face
• FD-R: circular diffuser face
• FD-*-Z: Supply air
• FD-*-A: Extract air

• H: horizontal spigot
• V: vertical spigot

Accessories

Lip seal

• Optionally available

Note: For circular plenum box with horizontal spigot: Lip seal only available in combination with damper blade

• 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)

• 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)

• 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
• Powder-coated, RAL 9010, pure white (no entry)
• P1: powder-coated, RAL CLASSIC colour

• Made of ABS plastic

• 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

• 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

• 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

• 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 information, please refer to our Environmental Product Declarations.