This tool lets you calculate the shading provided by horizontally parallel louvers, such as louvered blinds, a brise soleil, or a wooden trellis, with the louver system oriented either horizontally or vertically. Please read the important instructions, notes, and FAQ pages before using this tool.
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The author maintains a private mailing list of users of the SunAngle suite of solar design tools, and is happy to send you very occasional notices about software upgrades and other items of interest. Such notices do not typically occur more frequently than a few times a year.