Double louvered adjustable air grille is made up of two-double vanes,and it can adjust airflow's diffusing angle by changing vanes angle.It very adapts to the air outlet of horizontal hidden indatallation fan coil,and it can be installed air inlet control valve (mitre gate) as requirements to control air volume of air outlet. Double active louvered air supply is used as supply-air outlet in air-conditoning and ventilation system,can be installed in the end of air inlet and wall directly ,this air inlet has two-double orthogonal active vanes. Diffusing surface of air current can be controlled by adjusting horizontal and vertical vanes.Air current can be supplied freely up and down or to and fro..It can be dealt with baking varnish and apray paint,and also can be equipped with mitre gate and filtering net to control air volme and filtrate air.