1、Designation: E2797 11Standard Practice forBuilding Energy Performance Assessment for a BuildingInvolved in a Real Estate Transaction1This standard is issued under the fixed designation E2797; the number immediately following the designation indicates the year oforiginal adoption or, in the case of r
2、evision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 PurposeThe purpose of this standard is to define acommercially useful practice in the United Stat
3、es of Americafor conducting a building energy performance assessment(BEPA) on a building involved in a commercial real estatetransaction and subsequent reporting of the building energyperformance information. The practice is intended to provide amethodology to the user for the collection, compilatio
4、n,analysis, and reporting of building energy performance infor-mation associated with a commercial building. The practicemay be used independently or as a voluntary supplement toGuide E2018 for property condition assessments or PracticeE1527 for Phase I environmental site assessments. Utilizationof
5、this practice and performance of a BEPA is voluntary. If theproperty owner (e.g., the seller) is unwilling to providebuilding energy use and cost information, a BEPA cannot beperformed.1.2 Building Energy PerformanceThis practice definesbuilding energy performance as the buildings total annualenergy
6、 use and cost for heating, cooling, electricity, and otherrelated uses. Energy use, for example, includes total electricitypurchased; purchased or delivered steam, hot water, or chilledwater; natural gas; fuel oil; coal; propane; biomass; or anyother matter consumed as fuel and any electricity gener
7、ated onsite from alternative energy systems (for example, wind energygenerator technology or solar photovoltaic systems).1.3 ObjectivesObjectives in the development of this prac-tice are to: (1) define a commercially useful practice forcollecting, compiling, and analyzing building energy perfor-manc
8、e information associated with a building involved in acommercial real estate transaction; (2) facilitate consistency inthe collection, compilation, analysis, and reporting of buildingenergy performance information as may be required underbuilding labeling, disclosure, or mandatory auditing regula-ti
9、ons; (3) supplement as needed a property condition assess-ment conducted in accordance with Guide E2018 or anenvironmental site assessment conducted in accordance withPractice E1527; (4) provide that the process for buildingenergy performance data collection, compilation, analysis, andreporting is c
10、onsistent, transparent, practical and reasonable;and (5) provide an industry standard for the conduct of a BEPAon a building involved in a commercial real estate transaction,subject to existing statutes and regulations which may differ interms of scope and practice.1.4 DocumentationThe scope of this
11、 practice includesdata collection, compilation and reporting requirements. Docu-mentation of all sources, records, and resources relied upon inthe investigation is provided in the report.1.5 Considerations Outside the ScopeThe use of thispractice is limited to the collection, compilation, and analys
12、isof building energy performance information as defined by thispractice. While this information may be used to facilitatebuilding benchmarking, labeling, rating or ranking, reportingof building energy performance information between a sellerand a buyer or a landlord and a tenant on a voluntary basis
13、 oras may be required by building labeling disclosure or manda-tory auditing regulations applicable to the building, or anyother use, such use is beyond the scope of this practice.1.6 Organization of This PracticeThis practice has 13sections and 12 appendices. The appendices are included forinformat
14、ional purposes only and are not part of the proceduresprescribed in this practice.Section 1 Describes the scope of the practice.Section 2 Identifies referenced documents.Section 3 Provides terminology pertinent to the practice.Section 4 Discusses the significance and use of the practice.Section 5 Di
15、scusses the relationship between this practice andASTM E2018 or ASTM E1527.Section 6 Describes the users responsibilities under this practice.Section 7 Describes the BEPA process.Section 8 Describes the site visit and walk-through.Section 9 Discusses interviews with owner, operator,orkey sitemanager
16、.Section 10 Describes records collection for the BEPA process.Section 11 Provides the records analysis methodology for buildingenergy use data.Section 12 Focuses on BEPA report preparation and reporting ofbuilding energy use information.Section 13 Identifies non-scope considerations.Appendix X1 Prov
17、ides the legal background on federal, state, or localbuilding energy use disclosure legislation and regulation.1This practice is under the jurisdiction of ASTM Committee E50 on Environ-mental Assessment, Risk Management and Corrective Action and is the directresponsibility of Subcommittee E50.02 on
18、Real Estate Assessment and Manage-ment.Current edition approved Jan. 15, 2011. Published February 2011. DOI:10.1520/E279711.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.Appendix X2 Identifies building energy performance and sustai
19、nabilitylabeling programs.Appendix X3 Discusses government and utility energy efficiency incen-tives and grants.Appendix X4 Provides guidance on suggested qualifications for theconsultant conducting the BEPA.Appendix X5 Information that can be collected from the propertyowner/operator/key site manag
20、er.Appendix X6 Provides a recommended table of contents and reportformat for the BEPA.Appendix X7 Provides general property types with categories and sub-categories that can impact building energy use.Appendix X8 Provides a general commercial building survey checklist.Appendix X9 Presents carbon emi
21、ssion estimation methodology asso-ciated with combustion processes related to energy usein a commercial building.Appendix X10 Provides common no-cost/low-cost energy saving mea-sures for commercial buildings.Appendix X11 Provides illustrative example of building site energy usecalculations.Appendix
22、X12 Provides a bibliography of references that may be usefulfor this practice.1.7 UnitsThe values stated in inch-pound units are to beregarded as the standard. The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standar
23、d.1.8 This practice cannot replace education or experienceand should be used in conjunction with professional judgment.Not all aspects of this pactice may be applicable in allcircumstances. This ASTM standard practice is not intended torepresent or replace the standard of care by which theadequacy o
24、f a given professional service must be judged, norshould this practice be applied without consideration of abuildings many unique aspects. The word “standard” in thetitle means only that the practice has been approved throughthe ASTM consensus process.1.9 Nothing in this practice is intended to crea
25、te or implythe existence of a legal obligation for reporting of energy,performance, or other building-related information. Any con-sideration of whether such an obligation exists under anyfederal, state, local, or common law is beyond the scope of thispractice.2. Referenced Documents2.1 ASTM Standar
26、ds:2E1527 Practice for Environmental Site Assessments: PhaseI Environmental Site Assessment ProcessE2018 Guide for Property Condition Assessments: BaselineProperty Condition Assessment Process2.2 Other Standards:3ASHRAE, 2004, Procedures for Commercial Building En-ergy AuditsASHRAE, 2010, Performanc
27、e Measurement Protocols forCommercial BuildingsANSI/ASHRAE Standard 105-2007 Standard Methods ofMeasuring, Expressing and Comparing Building EnergyPerformanceDSIRE Database of Federal, State, Local Government andUtility Incentives for Renewable Energy and EnergyEfficiency (http:/www.dsireusa.org)3.
28、Terminology3.1 DefinitionsThis section provides definitions and de-scriptions of terms used in this practice, terms used in thispractice extracted from Practice E1527 and Guide E2018, anda list of acronyms for keywords used in this practice. The termsare an integral part of this practice and are cri
29、tical to anunderstanding of the practice and its use.3.2 Definitions of Terms Specific to This Standard:3.2.1 appropriate reporting, nrepresents a standardizedway to report building energy performance information col-lected in accordance with and under the specific conditionsidentified in this pract
30、ice to parties including, but not limitedto, prospective purchasers, owners, property managers, lend-ers, tenants, investors, or others, including government orregulatory entities, that may request such information.3.2.2 building energy performance, na buildings totalannual energy use and cost for h
31、eating, cooling, and electricityand other energy-related uses.3.2.3 building energy performance assessment, BEPA,nthe process as described in this practice by which a personor entity collects, analyzes and reports on the energy use andenergy cost associated with a building. The output from theproces
32、s is the pro forma building energy use and the pro formabuilding energy cost, which are considered representative forthe building at the time of the commercial real estate transac-tion. Also provided is a reasonable range for energy use andenergy cost. Finally, the process provides the actual buildi
33、ngenergy use and cost over the time period included in theinvestigation. A BEPA is based upon data collected over theprior three years, or back to the last major renovation ifcompleted less than three years ago, with one year minimum.If acceptable data is not available for the minimum of one year,a
34、BEPA cannot be conducted as prescribed in this standard.3.2.4 commercial real estate, nimproved real property,except a dwelling or property with four or less dwelling unitsexclusively for residential use. The term includes, but is notlimited to, improved real property used for retail, office,industr
35、ial, hospitality, agricultural, or other commercial, medi-cal or educational purposes; property used for residentialpurposes that has more than four residential dwelling units; andproperty with four or less dwelling units for residential usewhen it has a commercial function, as in the operation of s
36、uchdwellings for profit. (Refer to Practice E1527.)3.2.5 commercial real estate transaction, na transfer oftitle to or possession of commercial real estate, rental of spacein commercial real estate under a lease for a set period of timein return for consideration, a transfer of a leasehold interest
37、incommercial real estate, or receipt of a security interest incommercial real estate, except that it does not include suchtransactions with respect to an individual dwelling, or abuilding containing four or less dwelling units, unless used forcommercial purposes such as the operation of such dwellin
38、gsfor profit. (Refer to Practice E1527.)3.2.6 cooling degree-days (CDD), nfor each day with anaverage temperature higher than 65F (18.3C), CDD is the2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStanda
39、rds volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. (ASHRAE), 1791 Tullie Circle, NE, Atlanta, GA30329, http:/www.ashrae.org.E2797 112difference between the average te
40、mperature and 65F (18.3C).For example, on a day with a mean temperature of 80F(26.6C), 15 CDD would be recorded. CDD data by month andregion is published by the Energy Information Administration.CDD historical data by month and region is published by theNational Oceanic and Atmospheric Administratio
41、ns (NOAA)National Weather Service Climate Prediction Center, CampSprings, MD for 200 major weather stations around thecountry, and by others, including NOAAs National ClimaticData Center in Ashville, NC. Information is also available athttp:/.3.2.7 data gap, nlack of or inability to obtain informati
42、onrequired by this practice despite good faith efforts by theperson or entity seeking to gather such information. Data gapsmay result from incompleteness in any of the activitiesrequired by this practice, including, but not limited to thecollection of records data (for example, an inability to colle
43、ctenergy use data back three years, or to the last major renova-tion if it occurred less than three years ago, or a minimum ofone years data), and interviews (for example, an inability tointerview the key site manager, and so forth). (Refer to PracticeE1527.)3.2.8 district energy, nis secondary ener
44、gy that is gener-ated off site and delivered to a facility in the form of steam, hotwater, or chilled water.3.2.9 easily visible, adjdescribes observations of items,components and systems that are conspicuous, apparent, andobvious during the walk-through without: intrusion, relocationor removal of m
45、aterials, exploratory probing, use of specialprotective clothing, or use of any equipment (such as handtools, meters of any kind, ladders, and so forth). (Refer toGuide E2018.)3.2.10 energy use, ntotal electricity, natural gas, heatingoil, district steam, district hot water, district cooling water,p
46、ropane, and so forth, including energy generated by renew-able energy sources (but separately identified) such as solar orwind, used by a facility for heating, cooling, lighting, power-ing, or fueling other end uses in a building. The units of totalbuilding energy use are typically kBtu/yr. Energy u
47、se asdescribed in this practice refers to site energy use.3.2.11 energy use equation, nrelates the dependent vari-able, total site energy use, including electricity and on-sitefuel/district energy use, to independent variables whose vari-ability is known to impact significantly a buildings energy us
48、e.Independent variables may, for example, include weatherconditions (HDD and CDD), operating hours for the building,occupancy (or vacancy) rate, and number of occupants. Inde-pendent variables may also include any other variable(s)judged to have a significant influence on building energy useand deem
49、ed by the BEPA consultant to be available, appropri-ate, relevant for the analysis.3.2.12 energy use intensity (EUI), ntotal building energyuse divided by the buildings gross floor area. The units ofbuilding energy use intensity are typically kBtu/SF-yr. EUI isassociated with a building of a specific property type withspecific characteristics or other factors that may facilitatecomparison with similar type buildings with similar character-istics (see Appendix X7 for a sample checklist of buildingcharacteristics that can impact e
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