The MDA and MDA-R device are used for effective air circulation and distribution. The device can be mounted to side-wall or into wall suitable for all types of premises and with higher T the MDA can be equipped with induction chamber. The device with equipped with internal air deflectors distribute air evenly. The unit comes in 8 sizes of 100, 125, 160, 200, 250, 315, 400, 500 with 20-2000 l/s (70-7200 m3/h) airflow rates. The under temperature is 6°C below room air temperature. The device does not require regular cleaning service but can be cleaned with removable front panel on demand.