COURTESY OF COLUMBIA UNIVERSITY Color-Coded Computed using city data, the map breaks down energy use into four categories: space heating, space cooling, electricity and hot water. Researchers at Columbia University's school of engineering have laun-ched a public, online catalog of all New York City buildings, each characterized by estimated energy consumption based on size and use.When users mouse over the interactive map, pop-ups present energy consumption estimates for individual buildings. The estimates are derived from a formula that multiplies square footage by the building type, such as single- or multifamily residential, business, school or industrial. Energy consumption is broken down
The market is generally healthy and steadily growing, and margins are up for large specialty contractors. Further, advances in design tools and owner demand for collaboration are giving subcontractors a seat at the table early on in projects.