The Homely Costs of Energy Conservation  

The WSJ has an article on a recnet renovation of Amory Lovins low / clean energy home - The Homely Costs of Energy Conservation.

Banana Farm 2.0, as Mr. Lovins calls his updated digs, was renovated largely with equipment donated by individuals and companies eager to be associated with the project. Mr. Lovins says he doesn't know what the two-year renovation would have cost had he had to pay the full tab. But just a few of the major items would put the retail cost of the project well beyond $150,000.

On a recent afternoon, Mr. Lovins climbed up onto his home's flat roof, an easy task because the back of the house is built into the side of a hill to take advantage of the earth's insulating power.

Laid across the roof are devices designed to capture solar energy: photovoltaic panels that convert sunlight into electricity, thermal panels that use the sun's warmth to heat water, and clear plastic tubes that funnel sunlight down into the house, where it illuminates the central hallway.

A bank of new photovoltaic panels nearly doubles the amount of solar electricity the house produces, to 9.7 kilowatts, enough for the house's needs. The panels, which were donated to Mr. Lovins, retail for about $30,000, not including installation, though tax breaks cut that price significantly.

"We are making no economic claims for Banana Farm 2.0," he says. "We deliberately brought in a bunch of cutting-edge, even bleeding-edge, stuff." Instead, he thinks that with the right government policies to spur market demand, even the most advanced green modifications could make economic sense. His role, as he sees it, is to push the limits of technology.

"Demand is the sum of a lot of negligible individual actions," he says. "When there are a lot of individuals, it isn't negligible. It adds up."

Banana Farm 2.0 isn't combustion-free. A wood-burning stove still sits near Mr. Lovins' office -- a backup heat source he hopes to abandon if the house works as planned this winter. But the new solar panels have allowed him to get rid of two devices that burned gas: a stove and a water heater.

Some of his proudest advances stem from mundane changes. He installed an electric stove made by a Swiss company that is 60% more efficient than other models he found. The savings stem partly from pots designed specifically for the stove. The pots eliminate warping that typically occurs with copper cookware, wasting heat.

He also has shaved energy use by insisting on an unconventional plumbing design. Typically, residential pipes that carry water would be ½-inch wide and turn at right angles. But that builds up friction, requiring electric pumps to work harder to propel the water. So Mr. Lovins had ¾-inch-wide pipes installed that run diagonally across ceilings and walls to minimize friction.

"If it looks pretty," he says, "it probably doesn't save energy."

For now, Banana Farm 2.0 is a showcase of what is technologically possible. Adopting some of the house's innovations on a wide scale would require huge investment and sweeping changes to governmental policy.

Still, Mr. Lovins knows that some of the most effective ways to reduce fossil-fuel use don't require groundbreaking science. As he headed out to dinner in his hybrid car on a recent evening, the Banana Farm's owner did something decidedly low-tech: He turned off the lights.