Transcript Presentation Title Slide - University of California, Berkeley

The Power of Information:
Rating and Disclosing Building
Energy Performance
Alexandra Sullivan
US EPA, ENERGY STAR
December 2, 2009
Agenda
 ENERGY STAR Ratings
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Objective
Characteristics
Technical foundation
Accessibility
 Energy Rating and Disclosure
 Benefits
 Market Interest
 Key to Success
 Questions and Discussion
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ENERGY STAR Ratings
Objective
 Help businesses protect the environment
through superior energy efficiency
 Motivate organizations to develop a
strategic approach to energy management
 Convey information about energy
performance in a simple metric that can be
understood by all levels of the organization
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ENERGY STAR Ratings
Characteristics
 Monitor actual as-billed energy data
 Create a whole building indicator
 Capture the interactions of building systems not
individual equipment efficiency
 Track energy use accounting for weather and
operational changes over time
 Provide a peer group comparison
 Compare a building’s energy performance to its
national peer group
 Track how changes at a building level alter the
building’s standing relative to its peer group
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ENERGY STAR Ratings
Technical foundation
 Analyze national survey data
 Commercial Building Energy Consumption Survey
(CBECS)
 Develop regression models to predict energy
use for specific space types based on operations
 Create scoring lookup table
 Ratings are based on the distribution of energy
performance across commercial buildings
 One point on the ENERGY STAR scale represents
one percentile of buildings
 Buildings that perform in the 75th percentile or
better can earn the ENERGY STAR label
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ENERGY STAR Ratings
Technical foundation
 The rating does
 Evaluate as billed energy use relative to building
operations
 Normalize for operational characteristics (e.g., size,
number of employees, walk-in refrigeration, climate)
 Depend on a statistically representative sample of the
US commercial building population
 The rating does not
 Attempt to sum the energy use of each piece of
equipment
 Normalize for technology choices or market
conditions (e.g., type of lighting, energy price)
 Explain how or why a building operates as it does
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Eligible Space Types
Bank/Financial
Institutions
Courthouses
Dormitories
Houses of
Worship
K-12 Schools
Medical Offices
Supermarkets
Warehouses
Hospitals
Office Buildings
Wastewater
Treatment Plants
Hotels
Retail Stores
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ENERGY STAR Ratings
Accessibility: Portfolio Manager
 Free on-line tracking and benchmarking tool
 Available for any building
 Track energy use
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Site EUI
Source EUI
Weather normalized source EUI
National average comparisons
Energy performance ratings (for selected spaces)
Track energy costs
Track carbon emissions using eGRID
Track water consumption
Data sharing functions and automated data import
Apply for ENERGY STAR recognition
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Statement of Energy Performance
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Certificate for Display
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Energy Rating and Disclosure
Benefits
 Identify inefficiency
 There is a great potential for cost-effective energy efficiency across the
national building stock
 Better information on how much energy buildings use and how buildings
compare to one another is critical to fulfilling this potential
 Provide a whole building assessment
 Energy assessment at the building level reveals information about how
technologies interact and influence performance
 Improve energy performance
 Simple metrics are powerful motivators for change, spurring efficiency
improvements within public and private organizations
 Metrics that can be easily quantified can be tracked regularly and
communicated within and among organizations
 Maintain savings
 Simple quantifiable measures can be tracked year-to-year to ensure
persistence of savings
 Almost 40% of ENERGY STAR labels each year are earning a label for
the second or third time
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Energy Rating and Disclosure
Growing Interest
 Organizations and businesses
 Internal energy management tracking
 Internal disclosure of scores (store managers,
regional and upper management)
 Voluntary disclosure of scores on web (school
districts, governments)
 Real Estate information services
 CoStar
 Hotel services (Travelocity, AAA, Orbitz)
 Mandatory Disclosure Legislation
 Time of Sale (California)
 Annual public disclosure (D.C. New York City)
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Energy Rating and Disclosure
Growing Interest
Learn about
governments leveraging
ENERGY STAR in
legislation and voluntary
campaigns.
www.energystar.gov/gove
rnment
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Energy Rating and Disclosure
Keys to Success
 Measured energy data
 The use of actual measured building data is critical to assessing
performance
 Measured data will account for interactions among building systems,
building maintenance, tenant activities, etc
 Data verification
 Data must be accurate to provide a fair comparison among buildings
 Decision makers need to know that information is reviewed and
complete
 Accessibility
 System and metrics should be easy to use and understand
 Costs should be kept to a minimum to encourage broad applicability
 Consistency
 Metrics should be used from design through construction and operation
 Standardized metrics provide a reliable platform for organizations
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Questions and Discussion