Deep Savings: Using Case Studies in Our Search for Success Find Sources and learn from Case Study results already gathered on Best practices and Measured Performance.

1. Innovation for Our Energy Future
Case Studies and Tools for Deep Energy Savings
in Existing Buildings
Shanti Pless
Senior Research Engineer
Commercial Buildings Research Group
National Renewable Energy Laboratory
June 30, 2011
NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC.

2. Session Outline
• Advanced Energy Design Guides
• Commercial Building Partnerships
• High Performance Buildings Database

3. DOE’s Better Buildings Initiative
1. Tax incentives. Streamline the 179D commercial building tax
deduction for tax year 2011 and restructure the tax incentive for
tax year 2012.
2. Financing. Increase and accelerate financing opportunities for
commercial and public building energy improvements through
existing SBA loan program & proposed DOE loan guarantee
program
3. Grants. Give competitive grants to state and local
governments to streamline and update codes and regulations
and to adopt policies and programs to attract private-sector
investment in building retrofits.
4. Challenge. Challenge CEOs and university presidents to
systematically upgrade their facilities for improved efficiency.
5. Workforce. Improve and expand workforce training and pilot a
buildings extension service.
www.eere.energy.gov/buildings/betterbuildings

4. 30% Advanced Energy Design Guides
• Packages of energy-saving
recommendations to achieve
30% energy savings over
ASHRAE Standard 90.1-1999
• More than 300,000 guides in
circulation since 2004
• Include whole building case
studies
• Detailed documentation
support each AEDG
• Free download or soft cover
purchase
• www.ashrae.org/aedg

5. Next Steps in the AEDGs
• 50% AEDGs
• Technical Guidance for Existing Building
Retrofits

6. Advanced Energy Guides for Existing Buildings
(AEG-EBs)
Purpose: Provide building owners and operators with
comprehensive guidance for planning and executing
successful retrofit projects in commercial buildings,
tailored to specific building types and climate regions.
Five AEG-EBs in development:
– K-12 Schools
– Office Buildings
– Retail Stores
– Grocery Stores
– Hospitals and Outpatient Healthcare Facilities
– Published end of 2011

7. Focus of AEG-EBs
Actionable information and tools
– Systematic analysis of potential energy savings for
most promising retrofit measures
• By building type
• By level of energy savings / depth of retrofit
• By climate region
– Methods for calculating complex, multi-year cash
flows for retrofit packages in support of a strong
business case
– Cost points for tipping retrofit decisions
– Case studies that support the recommendations with
real-world examples

8. AEG-EB Tiers of Retrofit Projects
Existing building commissioning
– 5-15% site energy savings, 1-2 year payback
– Retro-commissioning, low-cost/no-cost measures
Standard retrofit package
– 15-30% site energy savings, 3-12 year payback
– Energy-driven, cost-effective and low risk
Deep retrofit package
– >30% site energy savings, 7-15 year payback
– May require special circumstances (e.g. combined with
remodeling or repurposing the building)

9. Example Building Analysis in AEG-EBs
Office K-12 Hospitals/ Grocery
Building Type Buildings
Retail
Schools Healthcare Stores
Climate Chicago Duluth Las Vegas Miami Seattle
Elementary High
Example Building School School
Retro- Standard
Retrofit Depth commissioning Retrofit
Deep Retrofit
Energy Energy Energy
Measure Measure Cost Savings Measure
Measure Analysis Savings
Analysis
Cost Savings
Analysis Analysis
Cost
Example Retrofit Package 1 Package 2 Package 3
Packages M&V M&V M&V
1 2 3

10. Commercial Building Partnerships
Address real-world concerns
– Energy efficiency measures must be cost-effective, simple to
maintain, and consistent with a company’s “look and feel”
Are comprehensive
– All building systems must be addressed to reach stretch savings
goals and the solutions in each area must work together
Include research-quality verification
– Buildings are submetered to ensure proper operation and
measure performance of energy efficiency measures
Can be replicated
– Lessons learned are incorporated into “actionable” case studies
and products that allow companies to achieve similar savings
across their building portfolios

11. CBP: Partnering for Speed and Scale
Companies from the private sector working with national
laboratories to achieve significant building energy savings.
DOE national labs (NREL & PNNL) teamed Bank of America ProLogis
with 23 companies to: ForestCity Simon
IHG Tishman
– Retrofit at least one existing building at Speyer
30% less energy Kohl‘s Whole Foods
PNC CBRE
Ryan Hines
– Build one new building at 50% less Target John Deere
energy than Standard 90.1 Westfield Opus
Best Buy Regency
Centers
Labs provide technical assistance to biggest Hilton SuperValue
names in retail, commercial real estate, JCPenney Toyota
Macy's
and financial sectors
Early results: 75% of the CBP projects likely
to meet or exceed energy savings goals Commercial Building
Partnerships

12. New Construction Project Highlight
Whole Foods Market in Raleigh, North Carolina
– Grand opening March 17th, 2011
– 40,000 ft2 grocery store
– Projected annual cost savings of ~$100k versus code
– Comprehensive whole-building approach addressing
lighting, HVAC, refrigeration, plug loads, envelope, and
commercial kitchen
• identification of strategies applicable to existing stores
– 40% savings
Description of efficiency strategies
– http://www.nrel.gov/docs/fy11osti/50056.pdf
Two-page summary and checklist
– http://www.nrel.gov/docs/fy11osti/50790.pdf

13. Existing Building Project Highlights
Downtown Denver Office Building Tenant Improvement
– Upgrade completed February, 2011
– 23,000 ft2 (one floor) of a 52 story Denver landmark (built in 1983)
– Projected annual cost savings of ~$12k (3 year simple payback)
• 37% better than pre-retrofit and 28% better than 90.1-2004
– Report describing the business case plus the selected efficiency
strategies and how they were chosen under development
Target
– Upgrade in Thornton, Colorado expected to finish Fall, 2011
– 173,000 ft2 9-year old “SuperTarget” including commercial refrigeration
and kitchens
– Projected annual savings exceeding $100k
• 30% better than 90.1-2004
– Report complete, waiting approval

14. CBP Case Studies in Progress
DRAFT
DRAFT

15. PNNL Existing Building Project Highlights
jcpenney, Colonial Heights, Virginia —completed
• 45% modeled energy savings over historic baseline with 7.5-year payback
• Chiller replacement, RTU replacement, interior lights, parking lot lights,
signage, envelope measures, plug load controls
• Case study under review
Crowne Plaza Hotel, Arlington, Virginia —under way
• 31% modeled energy savings over historic baseline
• Partner developing cost estimates for economic analysis
• Guest room PTHP replacement, public area HVAC and variable air volume
upgrades, public area lighting, envelope measures
• Case study in progress
Regency Centers, Granada Village, California —under way
• 28% overall modeled energy savings over historic baseline with 6.8-year
payback
• RTU replacement, parking

16. Other NREL CBP Upgrade Projects
Kohl’s department store in Ohio
Supervalu grocery store, Massachusetts
Whole Foods Market in New Jersey
Prologis warehouse in Mississippi
• 30% savings from lighting retrofits
Best Buy, location TBD

17. Common Strategies
Across multiple building types:
• Upgraded fluorescent lamps and fixtures
• LED display lighting
• Daylighting
• Variable speed RTU supply fans
• Energy recovery
• Plug load controls and efficient office equipment
• Outdoor air optimization (DCV)
In grocery stores specifically:
• Evaporative condensing
• LED fixtures in low and medium temperature cases
• Doors on open medium temperature cases
• ECM motors for evaporator fans
• Variable frequency drives for condensers
• Waste heat from refrigeration used for air and service water heating
• Efficient commercial kitchen equipment

18. Upcoming Actionable Products
• Assessing and Reducing Plug and Process Loads in Commercial
Buildings
• Guide to Increasing Efficiency in Existing Buildings
• Setting Energy Performance Targets in Commercial Buildings
• Use Your Energy Bills to Assess Building Performance and Save Energy
• 30% Advanced Energy Design Guide User’s Manual
• Information Technology Settings and Strategies in Commercial Buildings
• Lighting Control Checklists for High-Performance Office Building
Integrated Design
• Variable Speed RTU Fan Upgrade Specification and Application Guide
www.eere.energy.gov/buildings/commercial_initiative

19. Using OpenStudio for Existing Building Analysis

20. Buildings Database
http://buildingdata.energy.gov

21. Portals
DOE:
• High Performance Buildings
• Renewable Ready Buildings
• High Performance Federal
Buildings
• Commercial Building
Partnerships (coming soon)
OTHER:
• USGBC
• AIA Top Ten
• NBI
• BuildingGreen
• And others…

22. BuildingGreen Portal

23. New Implementation
• Enhanced input
fields and better
input forms
• Better project
views
• Better workflows
and content
management
• Better
integration with
other websites

24. Thank You… A Question?
Shanti.pless@nrel.gov
www.eere.energy.gov/buildings/commercial_initiative/
NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC.