Written by Jennifer V. Hughes on January 07, 2014
Under Local Law 84 of 2009, large buildings must record and keep track of their energy and water use — and then the city posts the results for all to see. The letter grades are linked to a numerical score called the Energy Use Intensity (EUI), which measures the energy used by a building per square foot, per year. The median EUI for multifamily buildings in New York City is 132.1. Score a 109 or lower and you earn an A; higher than 160 is a D. But in practical terms, how well do these grades translate to real-life energy use?