Jamb-hung secondary door and method of installation

1. A method of installing a combination door unit, the method comprising:

placing a preassembled combination door unit within a threshold opening of a house, the combination door unit comprising a door frame, a threshold door hingedly coupled to the door frame, a mounting frame formed separate from and fixedly coupled to the door frame, and a secondary door hingedly coupled to the mounting frame;

removing the secondary door from the combination door unit;

after removing the secondary door from the combination door unit, securing the combination door unit to the house within the threshold opening; and

after securing the combination door unit, replacing the secondary door on the combination door unit.

2. The method of claim 1 , wherein replacing the secondary door on the combination door unit comprises assembling hinges, wherein each hinge of the hinges comprises a pin and a receiver each coupled to one of the secondary door and the mounting frame and wherein the pin is coupled to a different one of the secondary door and the mounting frame than the receiver.

3. The method of claim 2 , wherein assembling the hinges comprises, for each hinge, inserting the pin into the receiver.

4. The method of claim 2 , wherein the hinges comprise three hinges.

5. The method of claim 2 , wherein each pin is fixedly coupled to the mounting frame and each receiver is fixedly coupled to the secondary door.

6. The method of claim 1 , further comprising leveling the combination door unit by inserting a plurality of shims around the combination door unit.

7. The method of claim 1 , further comprising driving a plurality of fasteners through the mounting frame and the door frame.

8. The method of claim 1 , wherein the secondary door is configured to be removable from the combination door unit when the secondary door is in an open position rotated out of the mounting frame and irremovable from the combination door unit when the secondary door is in a closed position within the mounting frame.

9. A method of installing a combination door unit, the method comprising:

placing a preassembled combination door unit within a threshold opening of a house, the combination door unit comprising a door frame, a threshold door hingedly coupled to the door frame, and a mounting frame formed separate from and fixedly coupled to the door frame;

securing the combination door unit to the house within the threshold opening; and

after securing the combination door unit, installing a secondary door on the combination door unit by assembling hinges, wherein each hinge of the hinges comprises a pin and a receiver, each coupled to one of the secondary door and the mounting frame and wherein the pin is coupled to a different one of the secondary door and the mounting frame than the receiver.

10. The method of claim 9 , wherein assembling the hinges comprises, for each hinge, inserting the pin into the receiver.

11. The method of claim 9 , wherein the hinges comprise three hinges.

12. The method of claim 9 , wherein each pin is fixedly coupled to the mounting frame and each receiver is fixedly coupled to the secondary door.

13. The method of claim 9 , further comprising leveling the combination door unit by inserting a plurality of shims around the combination door unit.

14. The method of claim 9 , further comprising driving a plurality of fasteners through the mounting frame and the door frame.

15. The method of claim 9 , wherein the secondary door is configured to be removable from the combination door unit when the secondary door is in an open position rotated out of the mounting frame and irremovable from the combination door unit when the secondary door is in a closed position within the mounting frame.

16. A combination door unit assembly, comprising:

a preassembled combination door unit configured to be installed within a threshold opening of a house as a preassembled unit, the combination door unit comprising:

a door frame configured to couple with the threshold opening of the house;

a threshold door hingedly coupled to the door frame; and

a mounting frame formed separate from and fixedly coupled to the door frame; and

a secondary door configured to hingedly couple to the mounting frame through hinges, each hinge of the hinges comprising a pin and a receiver each coupled to one of the secondary door and the mounting frame, wherein the pin is coupled to a different one of the secondary door and the mounting frame from the receiver, and wherein the pin is configured to mate with the receiver by sliding into the receiver.

17. The combination door unit of claim 16 , wherein the hinges comprise three hinges.

18. The combination door unit of claim 16 , wherein the mounting frame is coupled to the door frame through a plurality of screws.

19. The combination door unit of claim 16 , wherein the secondary door is configured to be removable from the combination door unit when the secondary door is in an open position rotated out of the mounting frame and irremovable from the combination door unit when the secondary door is in a closed position within the mounting frame.

20. The combination door unit of claim 16 , wherein each pin is fixedly coupled to the mounting frame and each receiver is fixedly coupled to the secondary door.