Instead of a fix window or a high-shot window, we installed a folding door with a wide opening and closing rate. If all window-type folding doors are opened, rapid ventilation is possible at any time with a wide opening and closing rate, and in this regard, the air inside the hospital can be kept pleasant.​

When all the folding doors are opened, the front of the hospital is fully opened, giving you a visual effect of expanding the space with a cool view.The rubber gasket finish between the doors further increases airtightness and airtightness, resulting in greater insulation, room insulation, sound insulation, condensation, and leaks, especially in hot summer and cold winter.

Unlike other companies, Polzen Korea uses aluminum (AL-6N01) as a material for longer durability and has low rate of breakage even when used for a long time. It is designed in the form of a bearing roller to smoothly open and close the rail. Polzen Korea's folding door, which is produced directly/constructed by direct construction, maintains the highest customer satisfaction score through stronger construction and reliable A/S processing with the know-how and technology of its construction team over the years.