VDR

Application

• Type VDR ceiling diffusers are used as supply air diffusers for high rooms in comfort and industrial zones
• For mixed flow ventilation with different air patterns in heating and cooling modes
• Horizontal two-way supply air discharge in cooling mode
• High induction results in a rapid reduction of the temperature difference and airflow velocity
• Angled or vertical air discharge in heating mode
• For variable and constant volume flows
• For supply air to room air temperature differences from –10 to +15 K
• For room heights exceeding 3.8 m
• For suspended ceilings
• Freely suspended installation
• Ideal for use with TDC temperature difference control module

Special characteristics

• High penetration of air at low sound power level
• Particularly suitable for rooms with varying heat loads
• Ideal adaptation of the air discharge pattern due to two sections of adjustable blades
• Discharge direction can be adjusted manually or with an actuator
• Plenum box with side entry or top entry spigot, and variant with electric actuator and inspection access

Nominal sizes

• 315, 400, 630, 800

Variants

• Diffuser face only

Connection

• H: Horizontal duct connection
• V: Vertical duct connection

Parts and characteristics

• Circular diffuser face with two sections of adjustable blades
• Diffuser front frame
• Spigot ring

Attachments

• Electric actuators for adjusting the air discharge direction

Useful additions

• TDC temperature difference control module

Construction features

• Spigot suitable for circular ducts to EN 1506 or EN 13180

Materials and surfaces

• Blades, front frame and spigot ring made of aluminium
• Plenum box and cross bar made of galvanised sheet steel
• Front frame, blades and spigot ring 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