Four-way swirl diffuser is used for supply of hot or cold conditioned air from ventilation ducts to ambiances such as conference halls, theathers, sports halls and supermarkets. Product can be manufactured with fixed blades or adjustable blades by handle or servomotor. Blades are adjusted to vertical position for heating, to horizontal position for cooling and isothermal throws. They are used at places where ceiling height is minimum 3,8 mt. Operating temperature range is ±10 °C and 25 x 25 mm steel wire mesh can be used for protection of the diffusers surface.