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 ...

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 passive solar-heated home needs no solar panels to heat or cool it. Rather, the energy used to heat and cool a house comes directly from the sun through skylights and windows. Some of that energy is ...

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 ...