Window systems refer to the various components and technologies used in the construction and design of windows in buildings. These systems include frames, sashes, glazing, and hardware, all working together to provide insulation, security, and aesthetic appeal. Common materials for window frames include vinyl, wood, and aluminum, each offering different benefits in terms of durability and maintenance. In addition to traditional designs, modern window systems often incorporate energy-efficient features, such as double or triple glazing, which helps reduce heat loss and improve comfort. Advanced technologies, like low-E coatings and argon gas fills, enhance thermal performance, making window systems an essential aspect of sustainable building practices.