Wind-driven rain louvers have been subjected to rainfall rates up to 8 inches per hour with external wind speeds up to 50 miles per hour with impressive rain rejection results, states the manufacturer. They range in size from a narrow-profile 2-inch frame depth to an 8-inch frame depth in both horizontal and vertical blade configurations. A full line of Miami-Dade qualified louvers and a Miami-Dade qualified louvered penthouse also are part of the company's severe-duty louver line.