This is brilliant. Something automatic that can save money and energy.

This innovative shading system utilizes a bi-metal element that is bonded to high expansion and low expansion alloys. Whenever the temperature changes even slightly it makes the alloys produce an opposing force, which further causes the element to deform and rotate. This way when the sun shines brightly, the curtains are drawn back and when it hides behind the clouds, the curtains are drawn in. In addition, the system does not require any mainten … Read More

via ZöldTér – reloaded