438-SD Stationary, Drainable, Louver438 SD Stationary, Drainable, Louver MADE TO ORDER Lead Time 2 3 weeks Custom Sizes Available Click here for Submittal The 438 SD stationary, drainable, louver is designed to prevent water penetration in building exterior walls for non wind driven rain applications. Water is channeled away from the face of the louver via built in drain gutters into vertical downspouts that allow the water to drain at the sloped sill. The 438 SD is an AMCA certified
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