DOUBLE WINDOW HAVING HORIZONTAL CROSS-VENTILATION FUNCTION

摘要

The present invention relates to a double layered window having indoor and outdoor windows. The present invention provides a double layered window having horizontal cross-ventilation means installed at an upper end portion and/or a lower end portion of a vertical window frame so that air may flow in spaces defined between indoor and outdoor windows of each region through the horizontal cross-ventilation means without installing an openable window to all of the regions divided by the vertical window frame or without opening all openable windows.