ANATOMY OF A LOUVER A louver is an air termination or entry device composed of multiple blades which, when mounted in an opening, permits airflow but inhibits the ingress of other elements. The type of louver that is selected is dependent on the application, geographic location, and local building codes.
HEAD
Top of the louver and completes the connection between the jambs.
BLADE
Varies in shapes, sizes and blade angles to serve different purposes.
DRIP
Top of the louver that fills the gap between head and top blade. Equipped with a drainable channel.
BLADE ANGLE
The lower or flatter the blade angle, the easier it is to get air into the building.
JAMB
Structural support for the blades as well as channels water for drainable louvers.
SILL
Base of the louver.
BLADE STYLES
DRAINABLE BLADE A drainable blade is equipped with a gutter to channel water toward the jambs of the louver and away from the airflow.
J-BLADE
K-BLADE
CHEVRON BLADE The Chevron blade combines closed sight lines and drainability. With a C shaped hook at the top, it is the primary choice to stop wind-driven rain.
INVERTED Y BLADE An Inverted Y or V blade is intended for sight proof applications. With the closed sight-lines, sacrifices in free area performance and greater pressure drop are made.
The J-Blade has a smooth flat profile devoid of a gutter on the leading edge.
The K-Blade has an offset step in its profile acting as a rain trap. The K style blade can be drainable or non-drainable.
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