TANGRA CBP are made entirely of aluminum profiles and allowing manual adjustment of the slope of each lamella individually. Depending on the design and installation of the grille, it can be selected with horizontal (-H) or vertical lamellas (-V), as well as with a double direction (-II). The lamellas can be movable, thus allowing air distribution in one or two directions, or immovable (-Н). Constructed of aluminum profile with powder coating. Grilles are constructed o two types of profiles: L- profile (+L)  or rounded type of profile. They join to the air duct system with plenum box flexible ducts or directly joined to the air duct or directly joined to building elements. The air flow rate of treated air from one ventilation grille can be from 100m3/h up to over 1000m3/h (27l/s – above 278l/s).