1、Designation: E2797 15Standard 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 or unable toprovide building energy use and cost information, a BEPAcannot be performed.1.2 Building Energy PerformanceThis practice definesbuilding energy performance as the buildings total an
6、nualenergy 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 electri
7、city generated onsite from renewable/alternative energy systems (for example,wind energy generator technology, fuel cells, microturbines orsolar photovoltaic systems).1.3 ObjectivesObjectives in the development of this prac-tice are to: (1) define a commercially useful practice forcollecting, compil
8、ing, and analyzing building energy perfor-mance 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 benchma
9、rking, labeling, disclosure, or mandatoryauditing regulations; (3) supplement as needed a propertycondition assessment conducted in accordance with GuideE2018 or an environmental site assessment conducted inaccordance with Practice E1527; (4) provide that the processfor building energy performance d
10、ata collection, compilation,analysis, and reporting is consistent, transparent, practical andreasonable; and (5) provide an industry standard for theconduct of a BEPA on a building involved in a commercial realestate transaction, subject to existing statutes and regulationswhich may differ in terms
11、of scope and practice.1.4 DocumentationThe scope of this 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 thispracti
12、ce is limited to the collection, compilation, and analysisof 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
13、 a buyer or a landlord and a tenant on a voluntary basis oras may be required by building benchmarking, labeling,disclosure or mandatory auditing regulations applicable to thebuilding, or any other use, such use is beyond the scope of thispractice.1.6 Organization of This PracticeThis practice has 1
14、3sections and 11 appendices. The appendices are included forinformational 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.Secti
15、on 4 Discusses the significance and use of the practice.Section 5 Discusses 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.S
16、ection 9 Discusses interviews with owner, operator,orkey sitemanager.Section 10 Describes records collection for the BEPA process.Section 11 Provides the records analysis methodology for buildingenergy use data.1This practice is under the jurisdiction of ASTM Committee E50 on Environ-mental Assessme
17、nt, Risk Management and Corrective Action and is the directresponsibility of Subcommittee E50.02 on Real Estate Assessment and Manage-ment.Current edition approved Oct. 1, 2015. Published December 2015. Originallyapproved in 2011. Last previous edition approved in 2011 as E279711. DOI:10.1520/E27971
18、5.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1Section 12 Focuses on BEPA report preparation and reporting ofbuilding energy use information.Section 13 Identifies non-scope considerations.Appendix X1 Provides the legal background o
19、n federal, state, or localbuilding energy use disclosure legislation and regulation.Appendix X2 Identifies building energy performance and sustainabilitylabeling programs.Appendix X3 Discusses government and utility energy efficiency incen-tives and grants.Appendix X4 Provides guidance on suggested
20、qualifications for theconsultant conducting the BEPA.Appendix X5 Information that can be collected from the propertyowner/operator/key site manager.Appendix X6 Provides a recommended table of contents and reportformat for the BEPA.Appendix X7 Provides general property types with categories and sub-c
21、ategories that can impact building energy use.Appendix X8 Provides a general commercial building survey checklist.Appendix X9 Presents carbon emission estimation methodology asso-ciated with combustion processes related to energy usein a commercial building.Appendix X10 Provides common no-cost/low-c
22、ost energy saving mea-sures for commercial buildings.Appendix X11 Provides illustrative example of building site energy usecalculations.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 p
23、rovided forinformation only and are not considered standard.1.8 This practice cannot replace education or experienceand should be used in conjunction with professional judgment.Not all aspects of this practice may be applicable in allcircumstances. This ASTM standard practice is not intended torepre
24、sent or replace the standard of care by which theadequacy of 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 consens
25、us process.1.9 Nothing in this practice is intended to create 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 sc
26、ope of thispractice.2. Referenced Documents2.1 ASTM Standards:2E1527 Practice for Environmental SiteAssessments: Phase IEnvironmental Site Assessment ProcessE2018 Guide for Property Condition Assessments: BaselineProperty Condition Assessment Process2.2 Other Standards:3ASHRAE, 2011, Procedures for
27、Commercial Building En-ergy AuditsASHRAE, 2010, Performance 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 Renewab
28、le Energy and EnergyEfficiency (http:/www.dsireusa.org)3. 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.
29、The termsare an integral part of this practice and are critical 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
30、 and under the specific conditionsidentified in this practice to parties including, but not limitedto, prospective purchasers, owners, property managers,lenders, tenants, investors, or others, including government orregulatory entities, that may request such information.3.2.2 building energy perform
31、ance, na buildings totalannual energy use and cost for heating, 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 co
32、st associated with a building. The output from theprocess is the pro forma building energy use and the pro formabuilding energy cost, which are considered representative forthe building at the time the assessment is performed. Alsoprovided is a reasonable range for building energy use andenergy cost
33、. Finally, the process provides the actual buildingenergy 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 dat
34、a is not available for the minimum of one year,a 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, impro
35、ved real property used for retail, office,industrial, 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 ha
36、s a commercial function, as in the operation of suchdwellings 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 c
37、onsideration, a transfer of a leasehold interest 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 a2For referenced ASTM standards, visit the ASTM website, www.astm.org, or
38、contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards 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, At
39、lanta, GA30329, http:/www.ashrae.org.E2797 152building containing four or less dwelling units, unless used forcommercial purposes such as the operation of such dwellingsfor profit. (Refer to Practice E1527.)3.2.6 cooling degree-days (CDD), nfor each day with anaverage temperature higher than 65F (18
40、.3C), CDD is thedifference between the average temperature 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
41、theNational Oceanic and Atmospheric Administrations (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 da
42、ta gap, nlack of or inability to obtain informationrequired 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
43、 records data (for example, an inability to collectenergy 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 Practic
44、eE1527.)3.2.8 district energy, nis secondary energy 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-thro
45、ugh without: intrusion, relocationor removal of materials, 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 st
46、eam, district hot water, district cooling water,propane, and so forth, used by a facility for heating, cooling,ventilation, lighting, or powering other end uses in a building,with energy generated by renewable energy sources such assolar, wind or fuel cells separately identified (as these may benett
47、ed out when determining building energy use). The units oftotal building energy use are typically in thousands Btu peryear (kBtu/yr). Energy use as described in this practice refers tosite energy use.3.2.11 energy use equation, nrelates the dependentvariable, a buildings total site energy use, inclu
48、ding electricityand on-site fuel/district energy use, to independent variableswhose variability is known to impact materially a buildingsenergy use. Independent variables may, for example, includeweather conditions (HDD and CDD), operating hours for thebuilding, occupancy (or vacancy) rate, and numb
49、er of occu-pants. Independent variables may also include any othervariables judged to have a material influence on buildingenergy use and deemed by the BEPA consultant to be available,appropriate, and relevant for the analysis. The energy useequation for a building may be calculated for a buildings totalenergy use, for example, combined electricity and fuel, orseparately for the buildings electricity use and for the build-ings fuel use.3.2.12 energy use intensity (EUI), ntotal building energyuse divided by the buildings gro
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