Screwless window fastening system

1. A screwless window fastening system comprising;

a frame having an exterior surface, an interior surface, and a peripheral wall extending between said exterior and interior surfaces, said peripheral wall having an inward facing surface, said inward facing surface of said peripheral wall defining a window opening for receiving a window assembly through said exterior surface;

at least one window clip having a window frame receiving channel and being attachable to a window frame of a window with the window frame disposed in said window channel to form an assembly that is insertable into said window opening; and

at least one fastening clip that is removably engagable with said at least one window clip and said interior surface of said window frame,

wherein said at least one fastening clip has a first prong and a second prong, said first prong is removably receivable by a groove formed in said at least one window clip and said second prong is removably receivable by a groove formed through said interior surface of said window frame to attach said at least one fastening clip to said at least one window clip and said frame to further secure said assembly in said window opening;

wherein when said assembly is inserted into said window opening said at least one window clip engages with said frame to prevent withdrawal of said assembly from said window opening.

2. The screwless window fastening system of claim 1 , wherein said assembly is insertable into said window opening only in a direction through said exterior surface.

3. A screwless window fastening system comprising:

a frame having an exterior surface, an interior surface, and peripheral wall extending between said exterior and interior surfaces, said peripheral wall having an inward facing surface, said inward facing surface of said peripheral wall defining a window opening for receiving a window assembly, said peripheral wall configured for positioning within an opening through a wall with said exterior surface adjacent the exterior surface of the wall and with said interior surface adjacent an interior surface of the wall;

said frame further having a sill flange extending around and projecting from said inward facing surface in a direction laterally inwardly therefrom;

at least one window clip having a window frame receiving channel and being removably engagable to said sill flange;

wherein said at least one window clip is attachable to a window frame of a window with the window frame disposed in said window channel to form an assembly is insertable into said window opening through said exterior surface of said frame to engage said at least one window clip with said sill flange to prevent withdrawal of said assembly from said window opening; and

at least one fastening clip that is removably engagable with said at least one window clip and said interior surface of said window frame,

wherein said at least one fastening clip has a first prong and a second prong, said first prong is removably receivable by a groove formed in said at least one window clip and said second prong is removably receivable by a groove formed through said interior surface of frame to attach said at least one fastening clip to said at least one window clip and said frame to further secure said assembly in said window opening.

4. The screwless window fastening system of claim 3 , wherein said groove formed through said interior surface of said frame extends around the perimeter of said interior surface.

5. The screwless window fastening system of claim 3 , wherein said at least one window clip has a prong that extends along a length of said at least one window clip and that is removably engageable with said sill flange.

6. The screwless window fastening system of claim 3 , wherein said sill flange is disposed at said interior surface of said frame.

7. The screwless window fastening system of claim 3 , wherein said sill flange extends continuously around said inward facing surface.