SourceOne January 2011 Richard J. Barnett Property Manager 9 E 71st St. New York, NY 10021 Re: 9 East 71" Street Comprehensive Energy Assessment Executive Summary SourceOne Project Number 11-005 Dear Mr. Barnett: On December 23r°, 2010 SourceOne performed a walk through audit of the private residence located at 9 E 71st St. in Manhattan, NY. Representatives of SourceOne have: • Conducted a facility walkthrough. • Conducted interviews and met with representatives of the facility. • Identified energy efficiency measures (EEM's) recently enacted by the facility. • Identified additional EEM's that will conserve energy. • Identified potential EEM's that cannot be financial justified. Executive Summary: SourceOne recommends the implementation of the following EEM' s: 1. SI-EEM-1: Motor upgrades Annual Energy Savings: 24,399 kWhrs ($4,626) Payback: 1.18 years 2. S1-EEM-2: Backroom lighting upgrades Annual Energy Savings: 13,419 kWhrs ($2,544) Payback: 3.34 years 3. S 1-EEM-3: VFDs on air handlers Annual Energy Savings: 21,276 kWhrs ($4,034) Payback: 9.74 years 4. S 1-EEM-4: Condensate/hot water heat exchanger Annual Energy Savings: 210 therms of gas ($639) Payback: 6.39 years 5. S 1-EEM-5: Free-cooling heat exchanger Annual Energy Savings: 52,252 kWhrs ($9,906) Payback: 3.09 years 6. S 1-EEM-6: Increase multistack chillers Annual Energy Savings: 38,650 kWhrs ($7,328) Payback: 11.98 years Seven Penn Plaza • New York, NY 10001 • EFTA00287193