A side-by-side cross-section showing how each louver handles water. On the left, the Apollo solid extruded blade carries water across its flat top and into the integrated perimeter gutter. On the right, the Equinox hollow double-walled blade has a curved profile where water can pool at the low points rather than run off cleanly. The comparison illustrates the watershed design difference between a solid water-shedding louver and an insulated hollow one.