Louvres are designed for use in air transfer through door panels. The blades and angles are fixed and could not be adjusted. In positive and negative pressure systems, they are mounted on the door or wall to allow air passage.
Grilles are manufactured using specially rolled aluminum profiles. After applying putty to the joints of the case, it is sanded. After cleaning with a chemical solution, it is painted with electrostatic paint. Standard sizes are given in the tables. Upon request all sizes can be produced.