A louver, or air louver, is a type of window or wall panel that is designed to allow air to flow through it. It is commonly used in buildings to provide ventilation and air circulation, as well as to control the amount of sunlight that enters the space. Louvers are typically made of metal, wood, or plastic, and can be found in a variety of shapes and sizes. They are often used in conjunction with other window and wall treatments, such as curtains or blinds, to create a more comfortable and energy-efficient environment. Louvers are also often used in industrial and commercial settings to control the flow of air and regulate temperature. By allowing air to flow through the louver, it can help to reduce energy costs by keeping the space cooler in the summer and warmer in the winter. Louvers can also be used to reduce noise levels, making them an ideal choice for areas where noise control is a priority.