A wall that melts?

Yes, out house has a sun-heated room with a new technological innovation. This innovation is a block wall filled with material that melts as it warms above room temperature. When the concrete blocks are bathed by the sun in winter, they warm up, melting a type of paraffin. As the paraffin melts, it absorbs heat, and prevents the room from getting uncomfortably warm. At night, when the room cools down, the paraffin returns to its solid state, and radiates back the heat into the room. This state-of-the-art block wall also moderates the temperature during the summer, when the room is shaded from the hot sun.

How is the paraffin contained in the block wall? Although a small amount of this paraffin could be added to the mortar without affecting its structural properties, this was not done. Instead, approximately 1,000 aluminum soda cans were filled with the paraffin, placed in the hollow space, and sealed with mortar.