Stories by: Elana Varon

A few years ago, we had the local electric company do a home energy audit. Our 19th-century house was hard to heat, and as we suspected, the inspector found we didn't have enough insulation. But our most cost-effective change turned out to be the purchase of a new refrigerator. You can't manage what you don't measure. Once you start looking at the right data, the results can lead you to solutions you hadn't imagined.