Today the Louvre shutter panels are usually operable via a lever or cord or may even be motorised and remotely controlled. When shut, the panels almost completely prevent entry of light into the room. The panels can be shut or opened to various degrees thereby effectively controlling the amount of light entering the room. Because the panels are slanted, a partly opened Louvre shutter allows light to enter the room but not sunlight itself. The room therefore is lit up without the heat from the sun's rays. This helps keep the room relatively cool and helps you cut air conditioning costs. A partially open louvre shutter also prevents passers by and neighbours from looking into the house.
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