The ELF811DD Stationary Heavyline Louver Double Drainable Blade is a stationary louver that is 4" deep, and has double drainable blades at a 45 degree blade angle. It features:
• 44% free area. • Double drain gutters in each blade, and downspouts in jambs and mullions to drain water from louver for minimum water cascade from blade to blade. • Hidden mullions for attractive appearance. • All aluminum construction for low maintenance and high resistance to corrosion. • Low pressure drop and low water penetration.