| 摘要 |
The present invention relates to a multi-functional window and door system capable of easily changing the structure and, more specifically, to a multi-functional window and door system capable of easily changing the structure wherein: the heat insulation, wind resistance, airtightness, watertightness, and sound insulation of windows and doors are improved as multiple fixing windows formed with one or multiple rows are easily detached from and attached to the outside of a window frame; a structural change to the fixing windows formed with one or multiple rows by performance class is easily done in accordance with the purposes; the installation of a grille can be installed outside the fixing window; and the fixing window and the grille are installed at the same time or the fixing window and the grille are selectively and easily attached and detached. Therefore, the multi-functional window and door system significantly improves workability and has improved external appearance. |
