Harvard University Hilles Library Program Summary • Installation Cost: $1,600,000 • Nstar Incentives: $375,000 • Final Harvard Cost: $1,225,000 • Annual Energy Savings: · Electric: 2,100,000 kWh - $311,850 · Steam: 5,000 Mlbs - $45,000 · Water: 2,381,000 Gallons - $5,950 · Total: $362,800 • Simple Payback: 3.3 Years Energy Efficiency Measures • Controls • HVAC COMPREHENSIVE ENERGY EFFICIENCY TREATMENT ENGIE Services U.S. (ENGIE) performed a comprehensive energy analysis of the Hilles Library at Harvard University in Cambridge, Massachusetts, a 95,000 sq. ft., 4-story building built in the 1960s. The building had a 25-year-old, 400-ton chiller that was replaced with a 300-ton variable frequency drive (VFD) chiller. ENGIE also installed a direct digital control energy management

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