Window Sill Heating Panels

Dagor
Elgrab, Libya

Shiny stainless steel window sills on the inside of the house. When the sun shines in. They heat up and radiate heat. Inside the house. The warmth radiated wouldn’t be that much. But some.

Passive solar building exterior

RJ Watts
Toronto Canada

The sun-facing exterior of a building could be clad with a passive solar collection system such as black tubes enclosed in a translucent casing. In winter, a solar-powered fan at the bottom could draw in cool air and circulate the hot air at the top back into the building. In summer, the hot air could potentially drive a turbine to generate power to cool the building.