Sierra Club Green Home

Studies conducted by the American Society of Heating, Refrigerating and Air-Conditioning Engineers show that windows can account for 25-30% of the total heating and cooling energy use in a home. Optimal window performance requires some research to determine the most appropriate units for a home based on energy efficiency, solar exposure, usability and aesthetics.

Florida-based SAF-GLAS, which creates disaster-resistant and security-related glass products, recently introduced EnergyGlass at a solar seminar at GlassBuild America. This transparent glass incorporates inorganic nanoparticles into clear laminated glass. With its use of a proprietary polycarbonate interlayer and patented film, this turns a window into a 24-hour a day solar “farm.” (Photo by Ecstaticist, Flickr)

Cities run entirely on solar power, countries generating electricity through volcanoes, and hotels built underground to keep cool are not fantasies of the future—they exist right now, in some of the most remarkable green-pioneering places. (Photo courtesy of TripBase, Inc.)

SAN FRANCISCO — The EcoCenter at Heron’s Head Park is the city’s first building that is completely off the power grid. It features on-site solar energy generation, rainwater collection, and sewage treatment—taking advantage of the sun, the rain, and the natural surroundings. “We don’t want to connect to the grid,” says Tracy Zhu, EcoCenter program manager. (Photo by OpenHomesPhotography.com, courtesy of EcoCenter)

Windows let in light, air, and a view of the world. But inefficient windows–as well as inefficient skylights and entry doors–are like holes in your walls and roof. They let out too much heat in the winter and let in too much heat in the summer. And that boosts your energy bill.

The Curtain Rises on Green Options The right window treatment can help turn a room from drab to divine. It can also save energy, keep you more comfortable, and even make your home healthier. If that sounds like a lot to ask of a mere shade or shutter, read on to find out just how [...]