1. MAXIMIZING DORM ENERGY SAVINGS WITH INTELLIGENT HVAC CONTROLS AASHE CONFERENCE, OCTOBER 11, 2011 AASHE CONFERENCE, OCTOBER 11, 2011

2. AgendaAgenda Challenges in Residence Halls About NYU Finding a Solution to these challenges The Solution Results Lessons Learned

3. Source: US Energy Information Administration Challenges in Residence Halls Why Now? At Home: Space heating and Air condition = ~49% 1.Continued rise in utility rates 2.Technological improvements which make systems fit a Return on Investment (ROI) 3.Proven technology to address challenges 4.Green mind shift

4. Students leave the room and do not shut off or adjust the setpoint Manually monitoring dorm room temperature is impossible – Requires full participation of students, or… – Requires continual room checks and student disruption While many students have an increasingly “GREEN” mindset, it doesn’t mean we can always count on them Challenges in Residence Halls

5. About NYU’s Residence Halls Housing 12,500 students –Owned: 15 Buildings –Leased: 10 Buildings Types of Heating/Cooling Units –PTAC (water & steam source) –Heat Pump –Fancoil Building Management System –Yes and No

6. Wide Variety of types, sizes, voltages, and existing controls About NYU’s Residence Halls

7. Project Goals – Reduce Wasted Heating and Cooling – Lower Utility expenses – Improved controls for students – Demand Curtailment capability – Ability to create campus wide set-point ranges Key Requirements – Limit Student Impact – Utilize Campus network between buildings – Remote confirmation of thermostats – Maintainability – No Interference with Campus WIFI – ROI Looking for a Solution to Challenges

8. Occupancy Based HVAC Controls Solution to Challenge: Occupancy based HVAC Controls –Telkonet Smart Energy System Installations: Completed: 11 Residence Hall Buildings Totaling: 4,629 units

9. What is a Smart System? Utilizing Occupancy based controls to eliminate wasted heating and cooling runtimes in student rooms Patented Recovery Time™ Technology Occupancy Based HVAC Controls

10. Installation: hardwired or wireless Networking/Central Management: – Zigbee: Low Cost, mesh standard networking, simple installation Additional uses: Lighting control Advanced scheduling Winter freeze protections February 2011

11. EcoSmart Zigbee Network

14. Controlling runtime when the room is Unoccupied – Decreasing runtime means less energy is consumed – Increases life of HVAC unit due to decreased use – Maximizes efficiency and savings Imposing (optional) limits on the “allowable” maximum or minimum temperatures, if desired – Applicable to Occupied and/or Unoccupied states Participation in Curtailment Events Less maintenance Comfort increased Lowering Peak Demand (Potential) 14 Results - Type of Savings

15. NYU Overall Project 15

16. TSE controller locations LocationInstall dateNumberNetworkedBMS Cooling Savings (kWh/year) Heating Savings (MMBTU/year) 26th St2008442x 155,584928 Alumni2008/2009483x 143,451773 Third North2009/2011675x 229,5001,823 Founders2009412 x264,504288 D'Agostino2009377x 183,976339 Mercer2009613x 299,144552 Palladium2010160 x102,720112 Weinstein2010320x 184,00026 Carlyle2010450x 153,0001,215 Goddard2011137x 109,737534 Gramercy Green2011560x 359,520392 Total46292,185,1366,982 Total cost savings, annually: $ 646,481 Total cost to install, 2008-2011: $ 1,898,504 Average simple payback, years:2.9 Percent savings of NYU energy use from TSE controllers:4.92% NYU Overall Project

17. Thermostat Placement Maintenance Staff training & involvement Communication & Support – Residential Life Dept & Client Services Center Student engagement Lessons Learned

18. Questions?Questions? Dianne Anderson New York University 212-992-8577 Dianne.Anderson@nyu.edu

19. Mercer –2 Pipe Fan Coil (single mode selection, auto switchover) D’Agostino -2 Pipe Fan Coil (single mode selection, auto switchover) 26 th St. -Island Air, Steam Heat, Compressor Cooling Alumni Hall – Renovated new Evergreen Packaged units (24v remote stat capable) Third North– Renovated new Evergreen Packaged units (24v remote stat capable) Founders Hall – New Build, Alerton Control module interfaced with dry contact for occupancy. Palladium – Heat Pumps, Existing Alerton control interfaced into existing BMS reports. Carlyle – Island Air and Adirondack units Gramercy – McQuay units (24v remote stat existing) About NYU’s Residence Halls

20. BuildingCooling Savings (%) Heating Savings (%) Cooling Savings (hrs/day) Heating Savings (hrs/day) Alumni24.925.00.960.38 Carlyle23.925.71.810.25 Third North24.229.21.190.49 Weinstein41.822.22.530.18 NYU Overall Project