CERT UPDATE TO GUILFORD COUNTY

1. CERT UPDATE TO GUILFORD COUNTY ENERGY AUDITS OF BELLE MEADE BUILDING BB&T BUILDING HIGH POINT COURTHOUSE & DETENTION CENTER HIGH POINT PUBLIC HEALTH BUILDING APRIL 7, 2009

2. WORK TO DATE • GATHERED ENERGY USE DATA • REVIEWED EXISTING BUILDING CONDITIONS • IDENTIFIED AND ANALYZED SEVERAL ENERGY CONSERVATION MEASURES

3. GREENSBORO MENTAL HEALTH BUILDING • Building location Greensboro • Built year 1991 • Total Area 99,935 ft2 • In terms of operations the building is divided into three section: • Main building: 87,421ft2; 12hr/6 days/week • Computer: 6030ft2; 24hr/7days/week • North Wing : 6030ft2; 24hr/7days/week • Each sector has its own AC which runs 24hr/7days/week NORTH ELEVATION SOUTHEAST CORNER

4. ANNUAL ENERGY CONSUMPTION 2008 Energy Cost Index =$1.75/ft2/year Energy Use Index =118.57/kBTU/ft2/year

5. RETROFIT SAVINGS OPTIONS OPTION 1:REPLACE EXISTING LAMP WITH ENERGY EFFICIENT LAMP Current Practice: T12, 40 watt, magnetic ballast; 3 different fixtures: A, B, and C Recommended: T8 32 watts; Electronic ballast COMMON LIGHTING FIXTURES Implementation Cost Fixture type A = $49.00/fixture Fixture types B & C =$32.00/fixture Total implementation cost = $35,737.00 Simple payback period = 4.5 years Dollar Savings from Lamp Type A, B, & C =$7,867/yr

6. RETROFIT SAVINGS FROM HVAC Option 2A: Turn of Main Building AC from 10:00pm to 6:00am Weekends & Holidays • Estimated Savings: $ 12,315/year • Estimated Cost: $ 0.00 • Simple payback period: Immediate payback This analysis assumed that the City will provide their own labor. Option 2B: Changing from Fixed to Variable Frequency Drive • Estimated Savings: $ 4,335/year • Estimated Cost: $ 10,500 • Simple payback period: 2.4 years This analysis assumed that the City will provide their own labor.

7. OPtion2C: Replace the Existing Motor with Energy Efficient Motor Current practice: The fan is being driven by 75 hp motor, efficiency of 0.925 Recommended: Replace the 75 hp motor with efficient motor of efficiency 0.955 Assume an average load factor (LF) of 0.8, operate for 8,760hrs/year • Estimated Savings: $983/year • Estimated Cost: $4,505 • Simple payback period: 4.6years • This analysis assumed that the City will provide their own labor.

8. SAVINGS FROM RESET CHILLED WATER TEMPERATURE Option 3: R eset Chilled Water Temperature Estimated Savings: $ 2,937/year Estimated Cost: $ 3,000 Simple payback period: 1 year This analysis assumed that the City will provide their own labor.

9. SUMMARY Percentage Savings per year = 13%

10. GREENSBORO BB&T BUILDING Building location Greensboro Built year 1973 Total Area 64,301 ft2 Energy Cost Index =$2.15/ft2/year

11. RETROFIT SAVINGS OPTIONS OPTION 1: REPLACE EXISTING LAMP WITH ENERGY EFFICIENT LAMP • Estimated Savings: $ 10,884/year • Estimated Cost: $ 58,140 • Simple payback period: 5.3 years

12. RETROFIT SAVINGS FROM HVAC Option2: Reset chilled water temperature Estimated Savings: $ 2,670/year Estimated Cost: $ 3,000 Simple payback period: 1.2 years Option 3:Reset Hot water temperature Estimated savings: $750 Estimated cost: $3,000 Estimated pay back: 4 years

13. SUMMARY Percentage Savings per year = 8%

14. HIGH POINT COURTHOUSE & JAIL BUILDING Building location High Point Built year 1988 Total Area 227,044 ft2 Annual Energy use 21,454MBTU Annual Energy Cost $346,612.29 High-Point Courthouse Front View Building Energy and Cost Index • 94.5 kBTU/SF/YR • 1.5 $/kBTU/SF/YR

15. RETROFITSAVINGS OPTIONS • Replacing T12, 34 watt fluorescence tubes with T8 25 watt and electronic ballast: • Number of fixtures in Detention Center = 780; burning continuously throughout the year • Number of fixtures in Courthouse = 1316; burning 12 hour/day and 5days a week Option 1: Replace the Existing Lamp with T8 25 watt Estimated Savings: $ 29,534 Estimated Cost: $ 142,528 Simple payback period: 4.8 years This analysis assumed that the City will provide their own labor. Option 2A: Repair/Replace controls in Courthouse Estimated Savings: $ 19,825/yr Estimated Cost: $ 129,600 Simple payback period: 6.5 years

16. RETROFITSAVINGS FROM HVAC Option 2B: Repair/Replace Controls in Detention Center Estimated Savings: $ 4,637/yr Estimated Cost: $ 204,750 Simple payback period: 44.2years Option 2C: Add VFD to AHUs in the Courthouse Estimated Savings: $ 12,253 Estimated Cost: $ 60,000/yr Simple payback period: 4.9 years

17. Option2D: ReplaceVAV with Terminal Reheat in Courthouse with FPVAV Estimated Savings: $ 4,749 Estimated Cost: $ 160,000 Simple payback period: 33.7 years Option 2E: Install Water Side Economizer Estimated Savings: $2000-3000 Estimated Cost: $ 35,000 Simple payback period: 17.5-11.7years

18. Option2F : HVAC Re-Commissioning Estimated Savings: $1,413 Estimated Cost: $60,000.00(DC)/ $82,500.00(CH) Simple payback period: years *Option3 Installing Solar Panel in the Detention Center Estimated Savings: $ 12,800.00/yr @ 65% efficiency Estimated Cost: $250,000 and $300,000 *** Simple payback period: 19.5years This system will offset 50 tons of CO2 per year.

19. SUMMARY

20. HIGH POINT PUBLIC HEALTH BUILDING Building location High Point Built year 1990 Total Area 34,446 ft2 Building Energy and Cost Index • 190.81 kBTU/SF/YR • $3.32/kBTU/SF/YR

21. SAVINGS FROM RETROFIT Option 1: Replace T12, 34 watt fluorescence tubes with T8 25 watt and electronic ballast: Estimated Savings: $ 5,647.00/year Estimated Cost: $ 21,119.00 Simple payback period: 4.0 years Option 2: Reset Chilled Water from Outside Air Estimated Savings: $ 1446.00/year Estimated Cost: $ 3,000.00 Simple payback period: 2.1years This analysis assumed that the City will provide their own labor

22. SAVINGS FROM RETROFIT • Repair and Use the Existing Solar Water Heaters Estimated Savings: $ 983/year Estimated Cost: $ 4505.00 Simple payback period: 4.6years This analysis assumed that the City will provide their own labor SUMMARY

23. NEXT STEPS • COMPLETE FINAL REVIEW OF IDENTIFIED MEASURES • SELECT MEASURES TO BE IMPLEMENTED • IDENTIFY FUNDING SOURCES • OBTAIN DESIGN ASSISTANCE WHERE NEEDED TO IMPLEMENT MEASURES