Bay windows are large windows installed mostly in living area or living room. However, the location of a bay window totally depends on the interior of your house, you could locate them in a dining area, kitchen or bedroom as well. Bay window are larger unit made up of three windows joined together. The middle window is usually fixed, and in line with the existing wall. Both the side windows are at an angle of 30degree, 45degree, 60degree or 90 degree angle. Bay window is a fantastic option if you are planning to install or replace a window in your home.