500 - Steel Louvered Grille
510, 520, 540, 540S, 530, 535, 510Z, 530FF, 535FF, 530-FR, 535-FR, 530FF-FR, 535FF-FR
Overview
The 500 Series Louvered Grille uses adjustable (supply) or fixed (return) blades to control airflow and provide a supply or return unit with minimal see-through.
