A window is an opening in a wall or structure that allows light and air to enter while providing a view to the outside. Typically framed with materials like wood, vinyl, or aluminum, windows can be designed in various styles, including casement, double-hung, and sliding. They play a crucial role in energy efficiency and aesthetics in both residential and commercial buildings. In addition to their functional purposes, windows can enhance the overall design of a space. They can be adorned with treatments such as curtains or blinds, and their placement can significantly affect the ambiance of a room. Properly designed windows contribute to natural lighting and ventilation, making them essential in modern architecture.