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 ...

Dear Jim: I would like to use some free solar heating in a south-facing kitchen. I cannot afford to have a system installed professionally. What type of simple solar heater can I build myself for one ...

We recently featured one way to heat your house with the sun, but DIYer Daniel Strohl has spent three years perfecting his homemade solar garage heater, made out of a wooden box, some vacuum parts, ...

Do you enjoy coming home to a warm home in the dead of winter? Do you leave your furnace running in cold weather even if no one’s home? If you want to keep the house warm for when you return later in ...