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What is your Energy Level?

What is your Energy Level?. Residential and Commercial Energy Ratings. Garbett Homes of Salt Lake City, Utah. Photograph by: Orlo Stitt. Sandra K. Adomatis, SRA, LEED GA. Adomatis@hotmail.com Adomatis Appraisal Service Punta Gorda, Florida.

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What is your Energy Level?

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  1. What is your Energy Level? Residential and Commercial Energy Ratings Garbett Homes of Salt Lake City, Utah Photograph by: Orlo Stitt

  2. Sandra K. Adomatis, SRA, LEED GA Adomatis@hotmail.com Adomatis Appraisal Service Punta Gorda, Florida Consultant with Advanced Energy, Raleigh North Carolina http://www.advancedenergy.org/

  3. Objectives • Review the reasons the market’s view of energy is changing • Describe the physical traits of energy efficiency • Identify Energy Modeling Programs • List documents supporting energy rating

  4. Energy Efficiency Energy efficiency is “using less energy to provide the same service”. Turning off a light is energy conservation, not energy efficiency. http://eetd.lbl.gov/ee/ee-1.html

  5. Let me hear your building talk! Remember ….. “Let’s Get Physical!” Olivia Newton John

  6. How important is energy efficiency to the residential user? NAHB consumer survey found 51.8% of residential consumers found the term energy efficiency as positive. NAHB Research Center400 Prince George’s BlvdUpper Marlboro, MD 20774800.638.8556www.nahbrc.org

  7. Why is energy efficiency such a big deal? • Government Mandates • TAJ –First Draft Exposure • Valuation of Green Bldgs • Oil Crisis • Market Transformation

  8. The term market transformationis the strategic process of intervening in a market to create lasting change in market behavior by removing identified barriers or exploiting opportunities to accelerate the adoption of all cost-effective energy efficiency as a matter of standard practice. http://www.aceee.org/portal/market-transformation

  9. http://www.imt.org/resources/detail/save-act-fact-sheet

  10. Benefits of energy efficiency • Reduce expenses • CoStar Group – July 28, 2010, reports energy-efficient retrofits of commercial buildings has the potential to return twice as much in savings to owners and tenants as they require in investments.

  11. Commercial A much easier sell – because The investor cares about the bottom line...... Lender accepts income approach as the norm…. Lower utilities = higher net income

  12. Residential Does the market care? In California, new homes may be required to meet net-zero energy level by 2020 Will the underwriter accept energy efficiency as an element of comparison? Depends

  13. Residential Case in Point

  14. Residential Rating SystemsMeasuring Sticks

  15. HERS Index Performed by Home Energy Raters (HERS Raters) trained and qualified through RESNET. http://www.resnet.us/certified-auditor-rater

  16. Energy Audit versus Energy Rating • Energy Rating provides a comparative analysis on how energy efficient a home is when compared to other similar homes. • Provides a HERS Index score and uses diagnostic testing • Energy audit (aka energy assessment) pinpoints where and how a home is losing energy, which systems are working efficiently, and measure what cost-effective measures can be taken to rectify the situation. • Does not provide a HERS Index score and does NOT use diagnostic testing

  17. Energy Audit versus Energy Rating Austin City Council has a new mandate for all homes older than 10 years to have an energy audit before selling a home. http://www.energystar.gov/index.cfm?fuseaction=pt_awards.showAwardDetails&esa_id=3649

  18. MPG rating for homes • Standardized method for assessing the energy performance of a home’s major energy systems and envelope • Low cost service • Takes about 15 minutes if in concert with other assessment; less than 1 hour if stand-alone • Not intended to replace a full energy audit or diagnostics

  19. HES Score Home Energy Score Partners • Local and state governments, utilities, non-profits, and other home performance industry organizations Qualified Assessors • Must be certified as BPI building analysts or HERS Raters • Must also pass a 2-part DOE exam (free, on-line, proctored by a Home Energy Score Partner) Homeowner Report • Asset Score (given standard operating assumptions) • Home Facts: List of data collected by a Qualified Assessor • Recommendations for improvements http://www2.eere.energy.gov/buildings/residential/hes_research.html#webinars

  20. DOE is continuing to recruit Partners to implement program • Score at least 200 homes per year • Fulfill DOE’s quality assurance requirements (re-score 5% of homes) • 30 organizations have signed on to be Home Energy Score Partners

  21. Energy Performance Score(EPS) - A MPH Rating for homes Provides a standardized assessment of a home’s energy use and associated carbon emissions. The EPS allows for one homes energy use comparison to another without the influence of varying occupant behavior. http://energy-performance-score.com/

  22. HERS Insulation Installation Rating Grade 1 – The best – installed per manufacturers instructions. Grade II- The second best – Has some gaps Grade III – The lowest grade – Has substandard gaps and voids. http://www.greenbuildingadvisor.com/blogs/dept/building-science/grading-installation-quality-insulation

  23. Envelope Sealing Rating Air Changes Per Hour (ACH): The movement of a volume of air in a given period of time; if a house has one air change per hour, it means that the air in the house will be replaced in a one-hour period. http://www.seattle.gov/dpd/GreenBuilding/Resources/Greenbuildingglossary/default.asp

  24. http://hespro.lbl.gov/pro/

  25. Green Button http://www.greenbuttondata.org/

  26. Residential Energy Documents HERS Index Report – full report Green Score and worksheet Complete Energy Audit Res. Green & Energy Efficient Addendum HES Score

  27. Actual Utility Bills Are they the most reliable document for developing energy costs of the residential or commercial use building? Why or why not?

  28. Physical signs of energy efficiency • Landscaping • Site orientation • Energy efficient equipment • Window types /shades/ skylights /solar tubes • Overhang • Renewal energy equipment • Timers/ programmable equipment /dashboards • Maintenance history

  29. Commercial Energy Ratings Measuring Sticks

  30. https://buildingdata.energy.gov/about DOE Buildings Database The Database includes information on the energy use, environmental performance, design process, finances, and other aspects of each project. Members of the design and construction teams are listed, as are sources for additional information. In total, up to twelve screens of detailed information are provided for each project profile. Projects range in size from small single-family homes or tenant fit-outs within buildings to large commercial and institutional buildings and even entire campuses.

  31. Commercial Energy Benchmark • A first step • Social driver to change occupant habits • Changing occupant habits • reduces usage • increases net income • increases value

  32. ENERGY STAR Portfolio Manager provides Statement of Energy Performance, including • Benchmark Score (statistical ranking) • 70 means your building ranks in the 70th percentile of similar buildings in terms of utility usage • Based on actual utility bills and current operations • 100 point scale based on regression developed using CBECs data

  33. Energy asset rating provides a standard report including • -Current score and potential score • Buildings with the same current score may have different potential scores. • -Uses EnergyPlus model to predict EUI given standard set of operating assumptions • -Scale still under development • Adjusted for climate to allow comparison across U.S. • Adjusted for building type

  34. Energy asset rating Asset Score • No requirement for utility bills • Not comparing to CBECS or other building database • Allows comparison of buildings given standard assumed operation

  35. EUI EUI – Energy Use Intensity, is a unit of measurement that describes a building’s energy use. EUI represents energy consumed by a building relative to its size. (Total energy consumed in 1 yr in kBtu/total floor space of building) Source: http://www.energystar.gov/index.cfm?fuseaction=buildingcontest.eui

  36. Areas with Energy Benchmarking Programs

  37. http://www.phillybuildingbenchmarking.com/index.php/benchmarking/http://www.phillybuildingbenchmarking.com/index.php/benchmarking/

  38. Chicago Proposes Energy Benchmarking Law for Buildings July 2013 The ordinance states that buildings over 50,000 square feet will be required to receive an EPA Energy Star Score, track and verify their energy consumption. The proposed compliance dates are: Commercial and Municipal Buildings: 6/2014 for those larger than 250,000 square feet 6/2015 for those between 50,000 and 250,000 square feet Residential Buildings: 6/2015 for those larger than 250,000 square feet 6/2016 for those between 50,000 and 250,000 square feet After one year of compliance, the city would be able to publish individual building performance data, adding a public incentive for owners to improve efficiency. Exempt from the law are industrial facilities, storage units, hazardous use units, as well as certain newly constructed units and those that are facing financial distress. http://www.cityofchicago.org/content/dam/city/progs/env/SustainableChicago2015.pdf

  39. http://apps1.eere.energy.gov/buildings/tools_directory/doe_sponsored.cfmhttp://apps1.eere.energy.gov/buildings/tools_directory/doe_sponsored.cfm

  40. Green Building Information Gateway -GBIG http://www.gbig.org/collections/4022/activities?view=map

  41. http://www.usgbc.org/DisplayPage.aspx?CMSPageID=2201

  42. Energy Asset Score • Energy asset score reflects the as-built physical characteristics of a building and its overall energy efficiency, independent of occupancy and operational choices. • The physical characteristics include • Building envelope (window, wall, roof) • HVAC system (heating, cooling, air distribution) • Lighting system (luminaire and lighting control systems) • Service hot water system • Other major energy-using equipment (e.g. commercial refrigerator, commercial kitchen appliances, etc.) Energy Asset Score Building energy use is affected by many factors.

  43. Relevance of Asset Score • Buildings #1 and #2 have similar ENERGY STAR scores, but widely divergent asset scores. • Used together, an energy asset score and an energy benchmark can inform the decisions of a building owner, operator, buyer, or lessee. Asset Score links to PMS. Building #2: Low Asset Score Building #1: High Asset Score Equivalent ENERGY STAR Portfolio Manager Score Energy Assets O&M/ Occupant Behavior • Poor energy assets • Good operation • Low asset score may highlight need to replace outdated equipment or prepare for replacement costs in the near future. • Good energy assets • Poor operation • May be a candidate for low-cost operational improvements.

  44. Energy Asset Scoring Tool User clicks “Score Building” and receives Energy Asset Score Report • EnergyPlus engine used to estimated energy use intensity (EUI) and generate an asset score based on the building envelope, mechanical and electrical systems, and other major energy-using equipment. – similar to Home Energy Score for Res. • Provides building system evaluations for building envelope, service hot water, HVAC, and lighting systems. • Identifies cost-effective improvements. • Provides an additional "after upgrades” score that demonstrates the potential energy impact of the recommendations.

  45. Data Requirements • Users can enter different amounts of data to receive results of varying degrees of specificity for their building. • Detailed inputs with validation by qualified party • Will likely require a qualified professional to verify and submit the data • Intended to support public statements about building asset Verified • Not available during pilot • Requirements still TBD • Users provide data for as many of the additional fields as they choose Advanced • More detailed input set • Basic minimum data needed • Anyone can do • Required to generate score and report • Inference engine generates default values for a few fields Simple

  46. Levels of Use For building owner or operator’s information For appraisal, real estate transaction, or public display Verified Preliminary

  47. Recent Program & Scoring Tool Improvements • Refined data requirements based on sensitivity analysis • Redesigned user interface based on 2012 Pilot feedback and user-centered research • Added detailed on-screen user help throughout tool-– Live demo on line • Created multi-block function for mixed-use buildings and buildings with complex geometries, envelope properties, and HVAC systems • Added greater variety of use types – Refrigeration areas not handled yet • 2012 Pilot: office, school, retail, warehouse only • 2013 Pilot: 2012 Pilot use types + lodging, multifamily, library, courthouse, mixed use (can also include senior center, city hall, post office, medical office) Expanded HVAC options-provides more accurate score of mixed use • Developed application programming interface (API) for third-party tools • Added a link to Energy Star Portfolio Manager (ESPM) • Allows user to download building info directly from ESPM • Improved weather adjustment methodology • Separately adjust for heating and cooling

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