In the winter to cut electric bills (or ice bills for those still using ice boxes) people used a number of different contraptions to harness nature. In the depression, metal window boxes with sliding doors sprouted from tenement windows. People had been making them out of wood for over a century. Also known as the window shelf, this version combines the experience of the past with modern materials.
Step 1: Assemble your materials
4 eye hooks or screws
picture hanging wire
a piece of styrofoam or cardboard
planks of wood-optional
The perfect window would be in your kitchen, north facing, and inaccessible to burglars and evil doers. most of us will have to compromise in some way. Another factor is the type of window available. Every style and size of window will need a slightly different installation process. I chose a window with an outer storm window, allowing me to pull the storm window down to the top of the box locking it into place. If you have a different type of window , adjust my instructions to suit. Some windows will need a few boards placed on the window sill for extra support, just like some air conditioner installations.
There are many types of boxes you can use .I chose a storage bin re-enforced with baling wire.