4 annually here. We are talking about a savings of $4.

A lot of it is actually the “logic” of energy management (figuring out which spaces need warmth/chill. . . The Empire state building is undergoing a major retrofit that should result in a 40% energy savings. ). There is a lot of things to fix – here’s the list: windows light, radiator insulation, lighting, air handlers, chiller plan, building control system, ventilation control, tenant energy management. The planned renovations will cost about $500 and everything should be finished in 2013. Old buildings can be power hogs, but it doesn’t mean that they have to stay that way.