1. EXISTING BUILDINGS 5

2. Slide header copy In This Chapter • Sustainable existing buildings • Planning green projects for existing buildings • Measures to improve existing buildings • Retrocommissioning and ongoing commissioning 1-1 5-1

3. Slide header copy S • According to Elefante, in a generation:20 • Four out of five existing buildings will be renovated • But just two new buildings will be added to building stock 5-2

4. Slide header copy Assessing EB Project Goals • Considerations: • Client motive/priority • The “going-in” state of the building • Cost threshold • Challenges 1-1 5-3

5. Slide header copy Assessment Tools • GBI’s CIEB Tool (pictured) • ENERGY STAR Portfolio Manager 5-4

6. Slide header copy Setting Performance Targets • Realistic return on performance • Realistic assessment of layout and design of building/leased spaces • Set cost expectations • Comparable building benchmarks 1-1 5-

7. Slide header copy Measurement of Building Improvements • Site energy use/Source energy use • Carbon foot print • Water usage • Waste 5-6

8. Slide header copy Common Mistakes for EB Upgrades • Focus on sustainability goals, not certification goals • Recognize danger of too many improvements made without overall planning 1-1 5-7

9. Slide header copy O&M Improvements • Green cleaning • Green pest management • Efficient lighting • Maintenance of HVAC operations • Staff training • Tenant education • Purchasing policies • Preventive maintenance • Supporting commuting alternatives • Optimizing water use for landscaping 5-8

10. Slide header copy Capital Upgrades • Considerations: • Nature and length of building operations disruptions • Tenant support of upgrade • Engineering limitations of building • Expert consultation and recommended options 1-1 5-9

11. Slide header copy Capital Upgrades for EB HVAC • Fuel cell power generation • Chilled-water applied systems (chiller) • Off peak cooling and thermal storage systems • Combined heat and power (CHP) systems • Variable frequency drives (VFDs) 5-10

12. Slide header copy Getting the Word Out: Greenhouse Gas Savings • EPA Greenhouse Gas Equivalencies Calculator • www.epa.gov/solar/energy-resources/calculator.html 1-1 5-11

13. Slide header copy Commissioning for EB 5-12

14. Slide header copy Retrocommissioning Benefits • Identifies and addresses system inefficiencies • Improves building’s overall performance • Helps drive operating expenses ↓, NOI ↑ • Identifies IEQ issues • Ensures owner expectations for operations • Provides additional benefits • Building staff well-trained 1-1 5-13

15. Slide header copy Retrocommissioning Payback (Median) 5-14

16. Slide header copy Retrocommissioning as First Step 1-1 5-15

17. Slide header copy Commissioning Challenges • Rent structure disincentive for some owners • Potential impact to tenant improvements already in place • Disruption of building operations potentially impacts tenant’s business operations 5-16

18. Slide header copy Case Study: Existing Building O&M • California EPA headquarters in Sacramento • Has become example of how small changes in building practices can significantly increase its sustainability and reduce operating expenses 1-1 5-17

19. Slide header copy Exercise: Sustainable Existing Building Concepts E. B. A. G. F. H. D. C. 5-18