Want to add natural light to a drab room? Skylights and solar tubes are two options to consider. Your roof orientation, design taste, budget and energy-efficiency goals all come into play when ...

UK-based solar tech developer Naked Energy’s rooftop solar vacuum tubes, which produce both electricity and heat, will soon be sold in the United States. Peoria, Illinois-headquartered ELM Companies, ...

SOLAR HOT WATER pre-heat systems fall into two basic categories active and passive types with numerous subcategories. A passive solar DHW pre-heater is also known as a breadbox heater or batch heater.

Solar photovoltaic cells and solar thermal collectors both capture the sun’s rays. The first one turns the light into electricity, while the other turns it into hot water for heating. They usually ...

When Terry McIlveen built his home in Maine in 1997, he made the unusual choice to install radiant floor heating. “People thought I was nuts,” he says. However, since that time, radiant floor heat has ...

Germany’s Fraunhofer ISE has developed a facade for buildings that absorbs heat from solar radiation and ambient air. It uses that heat as a source for residential heat pumps. The Tabsolar invention ...

Illinois-based ELM Solar, the US reseller of UK-based Naked Energy's solar thermal and photovoltaic thermal (PVT) systems, has installed 240 of the British company's TÜV-certified collectors at a ...

Harvard engineers have built a solar harvester that automatically toggles between producing heat and generating electricity ...