Alas! The political campaign season came to an end right before the cold weather set in. Just when you could have used some of that free hot air generated by the candidates to warm your house, it ...

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 ...