<p>What is presented is a window system that has a plurality of individual window units each installable between existing conventionally spaced wall studs. Each of the window units comprises a first window element that has a first jamb which is adapted for installation in the spacing between two individual studs of a standard wall. The first jamb has at least one flange extending laterally from it. The flange has a profile through which the window unit is secured to a stud and permits at least one other window unit in the window system to align adjacently to the flange in such a way that each adjacent window unit can secure to a common intervening stud.</p>
