Summary of aspects and indicators cen tc350


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There are quite a number of aspects and impacts used in an environmental, social and economic sustainability assessment. For the sustainability assessment of buildings and construction products quite a lot indicators for these aspects and impacts are defined now in the CEN TC350 standards.

In EN15804 defines 22 environmental indicators for quantifying on the environmental aspects and impacts from±

emissions to air, ground and water,
on the use of resources, use of secondary resources,
use of energy as fuel, as a resource and broken down into renewable and non-renewable
use of fresh water
on the flow of waste, and
the energy and secondary products resulting form the product and/or building life cycle

The standard prEN16309 - "Sustainability of construction works – Assessment of the social performance of buildings – Methodology" defined indicators for measuring social performance aspects of the building on the following aspect-categories:

1. Accessibility

2. Adaptability

3. Health and Comfort

4. Impact on the neighbourhood

5. Maintenance

6. Safety / Security

The standard for the economic performance assessment of buildings (LCC) defined:

Net Present Value / Net Present Costs
Annual Cost
Annual Equivalent Value

as indicators for measuring the economic performance in sustainability.

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Summary of aspects and indicators cen tc350

  1. 1. Info status d.d.: 12-12-2012Summary of aspects, impacts and indicatorsdefined in the CEN TC350 standards for the sustainability assessment of buildings and constructionproducts.General information for a better understandingThe CEN TC350 standards deal with the  environmental,  social, and  economicassessment of BUILDINGS.The building assessment requires data on CONSTRUCTION PRODUCTS and processes. Theassessment of the building defines the need for data from construction products. This means thatthe aspects and indicators that are standardised and defined for the building assessment, correspondwith the aspects and indicators that are standardised for the construction products.Overview of the CEN TC350 standards:For all the 3 dimensions of the sustainability assessment of buildings - environmental, social andeconomic - the standards define aspects, impacts and indicators, the methodology how to assess theperformance on those parameters per indicators. Sustainability can be taken in a very wide context, but the CEN TC350 standards ( as specified here above) have limited their scope to the assessment of the BUILDING. It does not include assessing e.g. the spatial planning that could describe the sustainability performance of building for the location, or for its access to public traffic, or to the infra structure , etc. It does not assess the Corporate Social Responsibility (CSR) of processes for designing or constructing, or doing activities within the building using it.see: buildings-and-other-sustainability-assessmentssee: youtube video Buildings and other sustainability assessments 1
  2. 2. Info status d.d.: 12-12-2012What is the difference between "aspects" and "impacts" ?An "ASPECT" in the standards of CEN TC350 is an environmental, social or economic theme thatdescribes the "impact" of the use construction product or the "impact" of the building related to theenvironment, society and economy. Example - seen through "environmental glasses" we use aspects like: emissions, resources, energy (as part of resources), waste. Example - seen through "societal glasses" we use aspects like: thermal comfort, accessibility, safety and security, etc.Sometimes it is impossible to quantify or to describe the "IMPACT" or that there is not yet amethodology available for measuring or describing such an impact. (environmental impact, socialimpact , economic impact) In that case the standard limits the assessment to the level of quantifying ordescribing the "aspect" without going into depth in what is (environmentally, socially, or economically)caused by this aspect. Example: Waste - hazardous waste: hazardous waste (disposed to landfill) assuch may cause damage to the environment if not handled and stored properly, but what impact itcould have on groundwater, flora and fauna, etc. depends on so many conditions that it does not allowto go into more details for quantifying an impact and thus it stops in listing the kg. of waste that is to bequalified as "hazardous waste".Furthermore it is important to realise that the standards deal with "impacts" and not with "avoidedimpacts". The assessment wants to quantify what the effect is if a material or a product is used or orprocess is applied. It does not quantify what would have been the effect if you had not applied theproduct or process or had used another product.To each aspect and/or impact the standard defines one or more "INDICATORS" for describing ormeasuring the impact. Of course then it requires that the standard specifies the METHODOLOGY formeasuring but also specifies the UNIT to express the result of this measurement.The CEN TC350 standards, as said before here, have their scope on the building and the constructionproducts. There are much more aspects, indicators and methodologies used in sustainability thandefined here in the CEN TC350 standards. There are many tools and schemes that use other andmore indicators and that use other conditions and methodologies. In research scientist constantly aredeveloping other methodologies and new indicators. But the CEN TC350 suit of standards is a set ofEUROPEAN standards that harmonise what could be agreed on a European consensus. It is alsobased on the availability of data on the chosen indicators. Implying however also that the indicatorsand the number of indicators may change in future. Standardisation is a living process: a request forrevision of the standards not seldom include a proposal for replacing or extending the list of indicators.see: YouTube - Who standardised what? 2
  3. 3. Info status d.d.: 12-12-2012The list of indicatorsper methodology standard as of 1-12-2012for the environmental assessmentEN15978 and EN15804 defined: Nr. Aspect-Indicator Symbol Unit 1. Global warming potential GWP kg CO2 equiv 2. Depletion potential of the stratospheric ozone layer ODP kg CFC11 equiv 3. Acidification potential of land and water sources AP kg SO2 equiv 4. Eutrophication potential EP kg (PO4)3- equiv 5. Formation potential of tropospheric ozone photochemical POCP kg Ethene equiv oxidants 6. A-biotic Resource Depletion Potential for elements ADP_e kg Sb equiv 7. A-biotic Resource Depletion Potential of fossil fuels ADP_f MJ, net calorific value (including feedstock) 1 8. Use of renewable primary energy (PERE) MJ, net calorific value excluding energy resources used as raw material 9. Use of renewable primary energy resources (PERM) MJ, net calorific value used as raw material Total use of non-renewable energy primary energy resources 2 (PERT) MJ, net calorific value 10. Use of non-renewable primary energy (PENRE) MJ, net calorific value excluding primary energy resources used as raw material 11. Use of non-renewable primary energy resources (PENRM) MJ, net calorific value used as raw material Total use of non-renewable energy primary energy resources3 (PENRT) MJ, net calorific value 12. Use of secondary material (SM) kg 13. Use of renewable secondary fuels (RSF) MJ, net calorific value 14. Use of non-renewable secondary fuels (NRSF) MJ, net calorific value (FW) 3 15. Net use of fresh water m 16. Hazardous waste disposed (HWD) kg 17. Non-hazardous waste disposed (NHWD) kg 18. Radioactive waste disposed (RWD) kg 19. Components for re-use (CRU) kg 20. Materials for recycling (MFR) kg 21. Materials for energy recovery (MER) kg 22. Exported energy (EE) MJ (per energy carrier)The aspects of Land-use and of Human-toxicity and Eco-toxicity are used in some Europeanassessment schemes, but no agreement could be found to include them in the first set of thestandards EN15978 and EN15804. Most probably (status Dec. 2012) these aspects will be discussed stin the 1 . revision of these standards.The parameters 1-7 concern parameters that describe environmental impacts.The following 8 parameters (8-15) describe resource input into the object of assessment.Three (16,17 and 18) additional environmental parameters describe the waste categories, andanother 4 additional environmental parameters (19-22) describe environmental output flows fromthe assessed system.For the discussion on how to quantify the EU policy aspect of RESOURCE EFFICIENCY theparameters on resource input (8-15) and the parameters on environmental output flows (19-22)should provide sufficient information if the regulators want to measure the resource efficiency of works. 4(Basic Requirement for Construction Works)1 the acronyms between brackets are used in some European EPD schemes, but not defined in the standards.2 summation of indicator 8) and 9); only in listed EN15804 for construction products3 summation of indicator 10) and 11); only in listed EN15804 for construction products4 CPR- Construction Product Regulation - 305/2011 th (Annex 1;7 BRCW: Sustainable Use of Natural Resources) 3
  4. 4. Info status d.d.: 12-12-2012for the social assessment of buildingsprEN16309 5 defined:The aspect categories of social performance assessment for the users of a building deal with:1. Accessibility2. Adaptability3. Health and Comfort4. Impact on the neighbourhood5. Maintenance6. Safety / Security7. Sourcing of materials and services8. Stakeholder involvementThe aspect 7 (Sourcing of materials and services) and 8 (Stakeholder involvement) are not fullydeveloped and are given as an informative Annex.However as there are so many aspects to each of these categories, the standard has defined these 8aspect categories in subcategories: Building life cycle – Use Stage Building-related characteristics Control and user interactions related in prEN16309 characteristics in prEN16309Accessibility Health and comfort 1) Accessibility for people with additional 18) Thermal comfort needs 19) Indoor air quality 2) Access to building services 20) Visual comfortAdaptability Impacts on neighbourhood 3) ease of potential for adapting to other 21) Emissions use Safety and securityHealth and comfort 22) Security against intruders and 4) Thermal characteristics vandalism 5) Characteristics of indoor air quality 6) Acoustic characteristics 7) Characteristics of visual comfort 8) Spatial characteristicsImpacts on neighbourhood 9) Noise 10) Emissions 11) Glare/ overshadowing 12) Shocks/vibrationsMaintenance 13) Maintenance OperationsSafety and security 14) Resistance to climate change 15) Accidental actions (earthquake, explosions, fire and traffic impacts) 16) Personal safety and security against intruders and vandalism 17) Security against interruptions of utility supplyFor each of 22 sub-category aspects indicators are defined: approx. 140 (!) assessment lines arespecified and in discussion now with the standardisation committee members.see: prEN16309 is (per 1-12-2012) in its final standardisation stage. Early 2013 the standard will go for Formal Voteand, if approved, it will become available autumn 2013. 4
  5. 5. Info status d.d.: 12-12-2012Social performance is very difficult to quantify. You can not quantify or calculate on an aspect like youdo in an environmental life cycle assessment with an environmental indicator. Therefore for each ofthese assessment lines (social performance indicators) the assessment of the social performanceshould describe the on the above mentioned (140) indicators per indicator by means of a checklist.Not all of the aspects expressed on one or more indicators are relevant for the object of assessment,but by means of this checklist a detailed analyses of the buildings social performance can be made: A b c d e fIs the aspect Is there a Specify the Have measures Give value for Give referencerelevant for the national- minimum been taken for indicator or to relevantdesign of the regional or requirement exceeding the briefly specify documentationobject of European according the requirements measures taken to support e)assessment ? requirement prevailing regulation (given in c) to achieve the applicable ? or if not regulated, stated(yes/no) give details of a (yes/no) performance ? (yes/no) requirement concerned made in If yes - give the clients brief reference to the relevant regulation.It should be noticed that the scope of the assessment of the social performance of the building onlycovers the use stage of the building.Like in the environmental and in the economic assessment the assessment is carried out perinformation module.For the social performance assessment this results in the assessment of the information modules B1to B6. (in principle 140 indicator lines per checklist and per information module). The use stage B1 is the first and leading assessment step. However providing and securing the building performance in the use stage B1 requires maintaining (information module B2), repairing(B3), replacement(B4), refurbishment (B5), energy use for heating- cooling-conditioning (B6) and water use (B7) related to this use. The aspects (and impacts) however are always reported in the information module where the aspects (impacts) occur. 5
  6. 6. Info status d.d.: 12-12-2012for the economic performance assessment: Assessment of Economic performance of buildings - CalculationWork item:Methodology 6defined:  Net Present Value  Net Present Costs  Annual Cost  Annual Equivalent Valueas indicators for measuring the economic performance in sustainability.The assessment of the economic performance of buildings in a sustainability context buildings isbased on costs and value: • Cost – Economic performance expressed in cost terms • Financial value – Economic performance expressed in financial termsA FINANCIAL or INVESTMENT analysis serves a different purpose than a sustainability analysis onthe LIFE CYCLE COSTING defined with the CEN TC350 standards. A financial or investment analysiswill uses other indicators and use a much shorter reference study period than used for a sustainabilityanalysis. The results of a financial or investment analysis are not comparable with the outcome of theLCC (life cycle costing) analysis with the above listed indicators.The economic assessment also includes cost in the pre-construction stage . See information-moduleA0 in the graph above.Example:  Site costs - Costs include purchase or rental costs  Professional fees – fees paid to the project team for work on the project, including feasibility, planning and designThe framework standard EN15643-part 4 is listing per information-module the type and category ofcosts. Chris Hamans European Sustainability Consulting tel: +31433 02 02 63 mob: +31 648 60 63 63 URL: email: esc@hamans.com6 There is not yet assigned a EN-number to this standard in development.Like prEN16309 this standard (per 1-12-2012) is in its final standardisation stage having passed successfully theenquiry. Early 2013 the standard will go for Formal Vote and, if approved, it will become available early 2014. 6 JHRO