Bow window styles can be used in many different architectural settings. Their dramatic extension from a home adds architectural accent to an exterior wall. Bow and Bay windows can be flanked with casement windows or single hung windows for ventilation and additional light. A bow window is very similar to a bay window, except it’s generally composed of four or more windows joined at equal angles to form an even curve. Like a bay window, a bow window is a great addition to a living room or dining room.