Swirl Diffuser Type ‘FD’
FOR COMFORT ZONES, WITH FIXED AIR CONTROL BLADES
Circular and square ceiling swirl diffusers that create high induction levels, for high room air change rates
- Nominal sizes 300, 400, 500, 600, 625
- Volume flow rate range 9 – 235 l/s or 31 – 846 m³/h
- Diffuser face made of galvanised sheet steel, powder-coated
- For supply and extract air
- For variable and constant volume flows
- For all types of ceiling systems, and with an extended border also suitable for freely suspended installation
- High induction results in a rapid reduction of the temperature difference and airflow velocity
- Air change rates of up to 35 per hour can be achieved by arranging several diffusers in a row with a minimum pitch of 0.9 m (centre line to centre line)
- Ideal for comfort zones
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Product Information
Optional equipment and accessories
- Exposed diffuser face available in RAL CLASSIC colours
- Plenum box with cord-operated damper blade and pressure tap
- FD-Q: Square diffuser face
- FD-R: Circular diffuser face
- FD-*-Z: Supply air
- FD-*-A: Extract air
- H: Horizontal duct connection
- V: Vertical duct connection
- X: Flexible plenum box FLEXTRO
- Circular or square diffuser face
- Diffuser face with radially arranged fixed air control blades
- Plenum box for supply air, with an optimised equalising element that ensures a uniform airflow through the diffuser face
- Simple installation of the diffuser face due to central fixing screw with decorative cap
- Damper blade for volume flow rate balancing (optional)
- M: Damper blade for volume flow rate balancing
- MN: Pressure tap and cord-operated damper blade for volume flow rate balancing with the diffuser face in place
- Lip seal
- Spigot suitable for circular ducts to EN 1506 or EN 13180
- Spigot with groove for lip seal (if accessory lip seal has been ordered)
- Grille face made of galvanised sheet steel
- V, H: Plenum box and cross bar made of galvanised sheet steel
- X: Plenum box made of plastic and galvanised sheet steel
- Lip seal made of rubber
- Diffuser face powder-coated RAL 9010, pure white
- P1: Powder-coated, RAL CLASSIC colour
- Sound power level of the air-regenerated noise measured according to EN ISO 5135
- Maintenance-free as construction and materials are not subject to wear
- Inspection and cleaning to VDI 6022