Green buildings

Sue Butler decided it was time to cut the cord on fossil fuels. So when her aging gas furnace needed replacing, she turned to the Earth for a solution.

She installed a geothermal system--also called a ground-source heat pump, a water-source heat pump, or geo-exchange system--which recently started heating and cooling her Cambridge, Mass. home. Butler said she was motivated by environmental reasons and concerns over carbon monoxide from burning natural gas.

"It's not that much more expensive and I could manage it. And it means no more combustion and it gets the building off of carbon, which … Read more

LED manufacturer Cree has been awarded a contract from the U.S. Department of Defense to supply over 4,200 recessed LED lights for the Pentagon, the company announced Tuesday. Financial details were not disclosed.

Testing commissioned by the U.S. government determined that Cree's LR24 recessed LED lights would offer a 22 percent energy reduction compared with fluorescent lights, and save the Pentagon 140 tons of carbon dioxide emissions per year.

The government also commissioned a cost analysis that showed the lights would yield a payback of less than four years once things like energy savings, maintenance, and … Read more

Sentilla, a company that makes energy management technology for industrial and commercial facilities, announced Wednesday that it has secured $7.5 million in Series B funding from Onset Ventures and Claremont Creek Ventures.

The energy-management tech company has patented technology that allows people to use microcomputers to remotely monitor the energy consumption of industrial machines, and allow those machines to exchange data with one another, to collaboratively direct energy supplies to facilities as needed.

The communication between the human monitor and the machines themselves is done through a series of small pervasive computers mounted either at the machine or in … Read more

Dean Kamen is best known as the inventor of the Segway scooter and medical devices including a portable insulin pump, a stair-climbing wheelchair, and a robotic prosthetic arm. Like any good inventor or mad genius, Kamen can be called eccentric. He lives in a hexagonal-shaped home, commutes to work via helicopter, and owns his very own island. Kamen has declared his island, the three-acre North Dumpling Island off the coast of Connecticut, an independent state with its own constitution, currency (based on Pi), and navy (a lone amphibious vehicle). The island comes complete with a replica of Stonehenge.

And soon, … Read more

President-elect Barack Obama on Saturday said that building energy efficiency is central to his administration's economic recovery plan and outlined the conditions he intends to impose on ailing U.S. automakers.

In his weekly radio address, which is broadcast on YouTube, Obama laid out the planks a government-led spending program meant to revitalize the U.S. economy and create jobs.

"First, we will launch a massive effort to make public buildings more energy-efficient. Our government now pays the highest energy bill in the world. We need to change that. We need to upgrade our federal buildings by replacing … Read more

Tiny bits of toner wafting from laser printers can't be blamed for polluting indoor air, according to research released this week.

In 2007, a study from Queensland University of Technology in Australia suggested that breathing toner particles from printers could hurt the lungs as much cigarette smoke.

But researchers from that school and the Fraunhofer Wilhelm Klauditz Institute in Germany have found no evidence to support that claim, after examining the makeup of chemicals released from laser printers.

They determined that such airborne materials include paraffins and silicon oils that evaporate when a printer's fixing unit, which attaches … Read more

The U.S. Green Building Council held its annual Greenbuild Expo in Boston last week, exposing close to 30,000 people to the latest green-building technologies and materials.

People who attended the conference were impressed at the high number of attendees, a sign that what was once a fringe movement is becoming mainstream.

On the show floor, there were a number of products designed with the environment in mind, such as sustainably harvested wood, drywall made from recycled material, and kitchen counters made of recycled paper.

During the week, the U.S. Green Building Council passed a draft for an … Read more

Homeowners who dream of their electric meter spinning backward may seek solar panels to slash bills and carbon emissions. But where to start?

Before you call a contractor, these sites can assist with the early steps, like summing up what you could spend or save in your neighborhood.

San Francisco Solar Map

The San Francisco Solar Map helps locals lay their solar plans. A Google map pegs projects already up and running. Type in your address for estimates of installation fees and long-term utility bill savings and to find installers listed by the California Energy Commission.

Fog City's municipal … Read more

In its third round of funding, Industrial Origami secured $17 million on Monday toward commercializing its fold-up sheet metal technologies for building cars and household appliances.

The company says its patented system can slash manufacturing costs by 70 percent. Touted environmental benefits include less scrap waste at a factory as well as more efficient industrial shipping and storage.

The London-based Environmental Technologies Fund led the round.

"Industrial Origami profoundly changes the way products are designed and manufactured," said Patrick Sheehan, a partner at the fund, said in a statement.

Washing-machine maker Whirlpool is producing goods using the technology, … Read more