VDP

Swirl diffuser VDP is a unique outlet system with high primary induction within the plenum box and an adjusting device for variable air flow geometry. The main components are the round or square plenum box with an inner, cylindrical swirl element, an adjustable control nozzle (deflection vane) and the rounded outlet diffuser. The swirl diffuser can only be used with a plenum box. The VDP is produced in various formats and finishes, depending on the constructional and technical conditions and requirements

The internal, cylindrical swirl element generates a highly inductive circulation airstream in the box, resulting in an under pressure in its centre. Thus due to the negative pressure the room air enters the box causing mixing with the supply air, as a result supply air temperature differential is greatly reduced. This effect is further increased through the secondary air induction at the edges of the discharge, so that almost isothermal conditions are achieved within a short distance from the diffuser. The generated swirl stream itself is flat and extremely stable and is formed independently from the installation conditions (flush with ceiling or freely suspended). By means of the manual or motor-driven adjustable deflection vane, which is positioned in the centre of the diffuser, the air stream can be set from horizontal to vertical.

The swirl diffuser is therefore especially suitable for use in rooms with a height above 3 meters for alternative heating or cooling modes as well as for adapting the air flow penetration depth at variable flow rates or temperature differentials.

• Heating and cooling are possible with the VDP-M, especially in large rooms.
• Sizes: o 125 o 150 o 200 o 250 o 315 o 350 o 400 o
• Square or round face plates available
• Temperature difference ∆T = ± 15K
• Flow rates from 22 to 833l/s