The 91610, 91620 and 91520 architectural linear stainless steel bar grilles are designed to provide a clean, strong, horizontal look while offering optimum performance. The availability of a variety of frames allow the grilles to blend, compliment, or contrast with the ceiling, sidewall, or sill installations. These grilles can be used on supply or return portions of heating, cooling or ventilation systems. The 91610, 91620 and 91520 series linear stainless steel bar grille is an excellent choice for installation in soffit/sill applications where airflow is required to wash over a window in a high humidity location.