Window with multiple mounting flanges and systems and methods of installation

A building window comprising:

• at least one sheet of transparent or translucent material, each sheet of transparent or translucent material having a substantially planar shape, a first side, and a second side;
• at least one sash, each of the at least one sashes disposed around a perimeter of at least one sheet of transparent or translucent material;
• and
• a frame having an inner surface, an outer surface, a first side, and a second side, each sash disposed in the frame so that the first side of the frame aligns with the first side of the at least one sheet of transparent or translucent material and the second side of the frame aligns with the second side of the at least one sheet of transparent or translucent material, the frame comprising
• a first mounting flange coupled to the outer surface of the frame, the first mounting flange extending outward from the outer surface of the frame in a direction approximately parallel to the plane of the at least one sheet of transparent or translucent material, and
• a second mounting flange coupled to the first side of the frame, the second mounting flange extending outward from the first side of the frame in a direction approximately perpendicular to the plane of the at least one sheet of transparent or translucent material.