Ventilation grilles are decorative duct covers to hide duct and wall openings to match the interior design. Raptor Supplies offers a wide range of grilles from brands like Ameriflow, Decor Grates and Vulcan. Return air grillesprovide better circulation of air and have steel construction with white painted finish for corrosion resistance. Choose from a wide range of these grilles, registers and diffusers on Raptor Supplies.