Louvers are windows with slats that offer only partial access to the outside. When evaluating a louver you plan to install, the main sizing consideration is its free area. This defines how much of the louver consists of empty space rather than the frame or the blades. Measuring free space manually is a difficult process. Calculating it is difficult as well because different models of louver feature different proportions of free area. Online calculation tools, however, automatically calculate free area from the louver’s overall dimensions. Writer Bio
