RFD

Application

• Type RFD ceiling swirl diffusers are used as supply air or extract air diffusers for comfort zones
• Attractive design element for building owners and architects with demanding aesthetic requirements
• 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 –21.6 to 18°F
• For room heights up to 13 ft (lower edge of suspended ceiling)
• For all types of ceiling systems
• With an extended border and discharge nozzle also suitable for freely suspended installation (supply air variant)

Special characteristics

• Low sound power level, ideal for comfort zones
• Fixed blades
• For all types of ceiling systems
• Horizontal or vertical duct connection
• 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 (center line to center line)

Nominal sizes

• 5, 6, 8, 10, 12, 16

Variants

• RFD-Q: Square diffuser face
• RFD-R: Circular diffuser face
• RFD-*-D: Diffuser face with discharge nozzle

Connection

• K: Vertical duct connection, with duct collar
• US: Vertical duct connection, with transition piece
• A: Horizontal duct connection, with plenum box

Only RFD-R

• UO: Vertical duct connection, with transition piece and cross bar

Only RFD-R-D

• UD: Vertical duct connection, with transition piece, cross bar and discharge nozzle
• N: Horizontal duct connection, with shallow plenum box to be installed above open cell ceilings

Parts and characteristics

• Circular or square diffuser face
• Diffuser face with radially arranged fixed air control blades

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

• Inlet suitable for circular ducts to EN 1506 or EN 13180
• Inlet with groove for lip seal (if accessory lip seal has been ordered)

Materials and surfaces

• Q: Diffuser face made of aluminum
• R: Diffuser face made of galvanized sheet steel
• Plenum box, duct collar and cross bar made of galvanized sheet steel
• Transition piece made of aluminum
• Lip seal made of rubber
• Diffuser face powder-coated RAL 9010, pure white
• P1: Powder-coated, RAL CLASSIC color

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