BUILT TO PERFORM IN ANY STORM 1605W DVM Miami-Dade Qualified Hurricane Louver The Nailor 5" deep 1605WDVM is able to pass the stringent Florida Protocol TAS-100A Wind-Driven Rain Test without a damper at t ached. Most Miami-Dade Qualified louvers in the industry require dampers attached in the closed position to pass this test, and in turn, be applicable to use for "dry" rooms (rooms that are not meant to drain water or house items that are not water resistant). Eliminating the damper reduces added bulk, weight and cost. Combine this with the 1605WDVM having the highest free area and lowest pressure drop in its class, and itʼs the most efficient and economical solution for your severe weather applications. Nailor Industries' Hurricane and Severe Weather louvers. Built to perform in any storm. nailor.comhttp://www.nailor.com