Type FDE

For high volume flow rates, with fixed air control blades

Square ceiling swirl diffusers

  • Nominal sizes 600, 625
  • Volume flow rate range 51 – 365 l/s or 184 – 1314 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
  • High induction results in a rapid reduction of the temperature difference and airflow velocity


Optional equipment and accessories

  • Exposed diffuser face available in RAL CLASSIC colours
  • Plenum box with cord-operated damper blade and pressure tap

FDE 00133609_0
  • Application
  • Description

Application

  • Type FDE ceiling swirl diffusers are used as supply air or extract air diffusers for comfort zones
  • Horizontal swirling supply air discharge for mixed flow ventilation
  • The efficient swirl creates high induction levels, thereby rapidly reducing the temperature difference and airflow velocity (supply air variant)
  • For variable and constant volume flows
  • For supply air to room air temperature differences from –12 to +10 K
  • For room heights up to 4.2 m (lower edge of suspended ceiling)
  • For all types of ceiling systems

Special characteristics

  • For high volume flow rates, with fixed air control blades
  • High induction results in a rapid reduction of the supply air to room air temperature difference and airflow velocity
  • For all types of ceiling systems
  • Horizontal duct connection

Nominal sizes

  • 600, 625

Variants

  • FDE-Z: Supply air
  • FDE-A: Extract air

Parts and characteristics

  • 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)

Attachments

  • 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

Accessories

  • Lip seal

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

  • Diffuser face, perforated plate with border, plenum box and cross bar made of galvanised sheet steel
  • Lip seal made of rubber
  • Perforated plate and border dip coated RAL 9005, jet black
  • Diffuser face 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

Technical information

  • Function
  • Technology
  • Quick sizing
  • Specification text
  • Order code
Schematic illustration of FDE 00109462_0.

① Diffuser face
② Central fixing screw
③ Plenum box
④ Cross bar
⑤ Suspension hole
⑥ Spigot


Optional
⑦ Lip seal
⑧ Damper blade for volume flow rate balancing
⑨ Pressure tap
⑩ Green cord for closing the damper blade
⑪ White cord for opening the damper blade
⑫ Measuring tube
⑬ Text label indicating plenum box variant

Functional description

Ceiling swirl diffusers in air conditioning systems create a swirl to supply air to rooms. The resulting airflow induces high levels of room air, thereby rapidly reducing the airflow velocity and the temperature difference between supply air and room air. Ceiling swirl diffusers allow for large volume flow rates. The result is a mixed flow ventilation in comfort zones, with good overall room ventilation, creating only very little turbulence in the occupied zone.

Type FDE ceiling swirl diffusers have fixed blades. Air discharge is horizontal omni directional. The supply air to room air temperature difference may range from –12 to +10 K.

A damper blade (optional) simplifies volume flow rate balancing for commissioning. Pressure tap and cord-operated damper blade (optional) allow for volume flow rate balancing with the diffuser face in place.

To give rooms an aesthetic, uniform look, Type FDE diffusers may also be used for extract air.

Nominal sizes600, 625 mm
Minimum volume flow rate, at –6 K51 – 365 l/s or 184 – 1314 m³/h
Maximum volume flow rate, at approx. 50 dB(A)330 – 365 l/s or 1188 – 1314 m³/h
Supply air to room air temperature difference–12 to +10 K


Quick sizing – sound power level and total differential pressure

Nominal size V Damper blade position
Nominal size V 45°90°
Nominal size V ΔptLWAΔptLWAΔptLWA
Nominal size l/s m³/h PadB(A)PadB(A)PadB(A)
600 × 248, 625 × 248 51 184 2<153<156<15
600 × 248, 625 × 248 145 522 142622304638
600 × 248, 625 × 248 235 846 3839574412251
600 × 248, 625 × 248 330 1188 75501135624062
600 × 313, 625 × 313 51 184 1<151<153<15
600 × 313, 625 × 313 160 575 102614282831
600 × 313, 625 × 313 260 936 253937427445
600 × 313, 625 × 313 365 1314 5050735214556


Ceiling swirl diffusers with square diffuser face. Supply air and extract air variants for comfort zones. Diffuser face with fixed air control blades for horizontal swirling supply air discharge creating high induction levels. For installation into all types of suspended ceilings.

Ready-to-install component which consists of the casing, diffuser face, spigot, and a cross bar to which the diffuser face is fixed.

The diffuser face is fixed to the cross bar with a central screw.

Spigot suitable for ducts to EN 1506 or EN 13180.

Sound power level of the air-regenerated noise measured according to EN ISO 5135.

Special characteristics

  • For high volume flow rates, with fixed air control blades
  • High induction results in a rapid reduction of the supply air to room air temperature difference and airflow velocity
  • For all types of ceiling systems
  • Horizontal duct connection

Materials and surfaces

  • Diffuser face, perforated plate with border, plenum box and cross bar made of galvanised sheet steel
  • Lip seal made of rubber
  • Perforated plate and border dip coated RAL 9005, jet black
  • Diffuser face powder-coated RAL 9010, pure white
  • P1: Powder-coated, RAL CLASSIC colour

Technical data

  • Nominal sizes: 600, 625 mm
  • Minimum volume flow rate, with –6 K: 51 – 365 l/s or 184 – 1314 m³/h
  • Maximum volume flow rate, with approx. 50 dB(A): 330 – 365 l/s or 1188 – 1314 m³/h
  • Supply air to room air temperature difference: –12 to +10 K

00133915_0

 Type
FDE       Swirl diffuser

 System
Z       Supply air
A       Extract air

 Connection
H       Horizontal

 Damper blade for volume flow rate balancing
No entry: none
M       With
MN       With cords and pressure tap

 

 Accessories
No entry: none
L       With lip seal

 Nominal size [mm]
       □Q × ØD
600 × 248
625 × 248
600 × 313
625 × 313

 Exposed surface
       No entry: powder-coated RAL 9010, pure white
P1       Powder-coated, specify RAL CLASSIC colour

       Gloss level
       RAL 9010 50 %
       RAL 9006 30 %
       All other RAL colours 70 %

 

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Contact

Thank you for your message!

Visual contact Visual contact

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265