Fixed bladed turbulent swirl diffusers are used in cooling applications due to their blade structures. They are suitable for places where ceiling height is between 2,6 - 4 mt. Also, they are ideal for the situations in which the air flow rate is reduced from %100 to %40. On the otherhand, adjustable turbulent swirl diffusers are used for the conditioned air in the meeting room ceiling applications where the ceiling height is bigger than 4 mt and in the ultra high ceiling applications such as factories, airports, theaters, banks, concert halls, conference halls to reach at the bottom points and to provide the ambiance to be heated or cooled uniformly by giving spiral movement to air. Blade movement can be made manually or by servomotor. Operating temperature range is between -10°C and +15°C and product is suitable for volume flow rates that are constant and variable from %100 to %40.