Circular air diffuser FD

squareceilingfixed

Circular and square ceiling swirl diffusers that create high induction levels, for high room air change rates Nominal sizes 300, 400, 500, 600, 625 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 Very high room air change rate possible thanks to row arrangement with a minimum pitch distance of 0.9 m Ideal for comfort zones Circular diffuser faces can be easily mounted without tools in a circular plenum box with horizontal spigot Exposed diffuser face available in RAL CLASSIC colours Square plenum box with cord-operated damper unit and pressure tap 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 FD 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.