Abstract: The technology provides an improved louvered panel assembly having a louver panel with at least a first louver and a second louver and a pivot bar that extends therebetween. A control arm is secured between the pivot bar and an operator to rotate the louver panel between open and closed positions. The first and second louvers include a central receiver that receives a first bearing surface to rotate the louvers about a rotational axis extending therethrough. A leading projection extends from the first louver and is rotated downward as the first louver operates between open and a closed positions. A trailing projection extends from the second louver and is rotated upward as the second louver operates between open and a closed positions. An elongated track is positioned below the louver panel and is spaced from the louver panel by a flap structure having a sealing membrane.