The sun’s energy can be captured by homemade solar hot-air collectors and thermosiphoning panels to provide free heat. The units direct air warmed by the sun through a window or wall opening into the ...

Adapting solar thermal tech used at utility-scale plants, start-up designs system to use the sun's heat to power industrial chillers and drastically cut peak electricity use. Martin LaMonica is a ...

While some of the highest technology in the world is being brought to bear on the problem of saving energy, here’s a guy who painted 50 soda cans black, drilled holes in them, stacked them up inside a ...

A group of researchers in Iran has analyzed the coefficient of performance and the energy consumption of a solar-assisted heat pumps and an air-source heat pumps and has found that three factors are ...

If you have at least one unshaded, south-facing window, you can use a solar heat grabber to direct warm air into your home. Wouldn’t you love to heat your home with free energy from the sun? There are ...