NYPA plans to replace a 21-year-old chilled water plant with two, new 460-ton chillers and cooling towers, valves, controls plus two sets of chilled water and condenser water pumps. This component of the program will reduce energy use by 2.6 million kWh (kilowatt hours) for projected annual savings of more than $191,000. Included in this project is the replacement of three Leibert AC units in NYPA's computer room and two wall units will be replaced with high efficiency units. Total cost for the cooling system installation project is $2.4 million, agency officials say.

Additional measures in the energy efficiency project at 123 Main St. include upgrades in lighting and computerization of mechanical environmental controls; installation of occupancy sensors in offices and common areas; lighting improvements in the building's garage, and a power control system that reduces the power requirement for all existing lighting fixtures. The entire energy efficiency initiative is projected to result in energy use reductions of 4.5 million kWh leading to annual energy savings of more than $313,000 at the property. Including energy efficient building improvements previously completed, the Power Authority has estimated it will harness energy reductions in excess of 50 percent from 1990 levels at the building.

The project at 123 Main St., started this month and is expected to be completed sometime during the summer of this year, agency officials say.

The building is also being used as a "working laboratory" for commercial applications of "clean, green" energy technologies such as solar applications on the property's roof and a microturbine clean energy system, which totals the size of a conventional refrigerator that is used by the agency to generate power and heat for the building. In addition, the 123 Main St., garage features charging stations for emission-free all electric vehicles.