Drum diffusers are used for heating, cooling and ventilation of ambiances where high and longa ir throws are needed such as gyms, factories, warehouses, concert halls and shopping centers. Air flow can be deflected to ±30° up and down with the help of cylindrical body placed into casing and also air flow can be deflected to lef tor right via adjustable blades placed into cylindrical body. Additionally they have ow pressure and sound levels.