The sauna diffuser is primarily used with a single main function: to exhaust air from sanitary service areas. The rotation mechanism in the middle section of the diffuser allows for adjustable airflow passage. The amount of open area for airflow can be easily modified. The structure of sauna diffusers is designed so that the central part can be easily removed and cleaned, and no unsightly or visible view of the duct is present, thereby maintaining the beauty and harmony of the surrounding environment. In this diffuser, the volume of airflow can be increased or decreased by altering the conical surface at the center. Installation can be performed on both the ceiling and the wall, and by rotating the central section to the right or left, you can adjust its airflow.