1, the structure is different: grille air outlet is generally made of aluminum alloy, the vent is a fixed fence, while the louvered air outlet is made of ABS material, the blade is movable and adjustable, equipped with electric actuators or air volume adjustment valve.

2, the function is different: grille air outlet sound insulation and adjustment of air volume is relatively weak, the main role is to ventilate and eliminate odors and other fixed needs, while the louvered air outlet air volume adjustment range is larger, according to the need to adjust the angle of the air supply to improve the comfort, while avoiding the entry of dust.