Retrofitting a building, especially an old building, is one way to improve energy efficiency and even attain LEED certification. But hiring professionals to research efficiency solutions can get pricey. Boston-based start-up Retroficiency Inc. has produced software that streamlines the process and—more importantly—saves money. “Our goal is not necessarily to replace the guy going out auditing,” says company founder Bennett Fisher. The goal is to “put a tool in his hands to make him 25 to 50% more efficient.” The software can be used in pre-bid evaluations. It can be deployed to predict the current energy consumption of a building, based
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.