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 your garage doors have windows as mine do, install a full sheet of insulation over the window section. Wait for the adhesive to fully bond, then cut out the window openings with a new razor blade.

Researchers in Malaysia designed a photovoltaic-thermal system that can be used in solar drying, space heating, rooftop systems, and off-grid thermal applications. It relies on a double-pass cooling ...