Environmental and health related criteria for buildings - ANEC

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IBO - Environmental and Health related Criteria for Buildings - “At least 50 % of the energy used for all purposes shall come from renewable energy sources (compliant evidence is provided by share and type of renewable energy).” (Criterion 13) Optional criteria - “The primary energy requirement for heating shall be not higher than 15 kWh/m²/year (verified by the energy efficiency certification).” (Criterion 47) - “At least 50 % of the annual needs for ventilation and cooling shall be satisfied through passive systems (verified by documentation showing the total annual cooling and ventilation demand and the related sizing of plants)”. (Criterion 48) - “At least 50 % of the annual needs for hot water production shall be satisfied through passive systems (verified by documentation showing the total annual cooling and ventilation demand and the related sizing of plants)”. (Criterion 49) It is not precisely defined whether green power supply agreements fall under the definition of renewable energy (besides, the energy suppliers can easily be exchanged by consumers and the supply of green power is not a building specification, at all.) The optional criterion 48 does not take into account that the cooling demand especially of residential buildings (in moderate Central European climate) should be optimised approaching zero and therefore need not be provided (or cannot additionally be reduced by 50 %) via passive systems (plants, etc.). Priority should be given to strategies which enhance the thermal performance of buildings during the summer period. To that end, there should be focus on measures which avoid overheating, such as external or internal shading, natural ventilation or sufficient thermal capacity in the building construction, and further development and application of passive cooling techniques, primarily those that improve indoor climatic conditions and the microclimate around buildings. Ventilation systems with heat recovery lowering the heating demand to a large extent should not be “punished” for using electricity which is not provided by building- or site-integrated photovoltaics. Energy and CO 2 embodied in materials CO 2 -Emissions (from building operation) are not explicitly mentioned and benchmarked (as they are to some extent correlated to the primary energy factors of energy sources) but will be taken into account if a Life Cycle Assessment (LCA) of the building would be carried out (optional criterion 33). Energy and CO 2 embodied in materials/products are separately assessed (optional criteria 39 and 45) exhibiting redundancies with criteria 40 “use or re-use of recycled materials/products”, 44 “labelled construction products (products awarded the EU Ecolabel or other national or regional ISO Type I Ecolabels)”, and criterion 33 “LCA of the building”. Final Report 58 31 03 2011
IBO - Environmental and Health related Criteria for Buildings Traffic-related energy issues Energy or emissions from traffic to and from site are indirectly assessed within the optional criteria 42 and 43 “Use of materials/products locally produced - non-structural functions and structural functions”. Mandatory is the restriction of car-places for residential buildings (max. 1 car-place per flat). The use of low-emitting vehicles as well as cycling are encouraged as the building shall have obligatory facilities for charging electric vehicles and open-space parking for LPG vehicles and adequate cycle storage facilities, either indoor or outdoor to ensure dry storage of bicycles. What “adequate” means is not yet specified in the Third Draft Criteria. 7.4. SBTool Source: Reference: “An Overview of SBTool, September 2007 Release” (ed. iisbe, Nils Larsson) Energy-relevant indicators are assessed both in section B “Energy and Resource Consumption” and in section C “Environmental Loadings”. The assessment framework provides a clear division into non-renewable primary energy embodied in construction materials and used for facility operations as pointed out in the following overview. B1 Total Life Cycle Non-Renewable Energy B1.1. Annualized non-renewable primary energy embodied in construction materials. Embodied primary energy used for structure, envelope (excl. glazing), and major interior components annualised over the expected life span of a building has to be taken into account (the proposal for rating ranges from 107 (acceptable practice) – 67 (best practice) MJ/m²a; assumed life span:75a). B1.2. Annual non-renewable primary energy used for facility operations Verification is provided by calculating the delivered energy in MJ per m² of net area, including fuel and electrical use, as predicted by means of an acceptable method or tool. SBTool applies conversion factors to this value to convert them into primary energy. The proposals for rating are 300 (acceptable practice) – 150 MJ/m²year (best practice) primary energy demand – electricity and 800 (acceptable practice) – 500 MJ/m²year (best practice) primary energy demand – total. B2 Electrical Peak Demand for Facility Operation Required is the average of peak monthly electrical demand for one year, W/m 2 , as predicted by means of an acceptable method or tool. The rating scale ranges from 5 (acceptable practice) – 2 (best practice) W/m² for small residential buildings) B3 Renewable Energy B3.1. Use of off-site energy that is generated from renewable sources The percentage of annual purchased electricity consumption planned to be obtained from sources that generate power by means of renewable energy is evaluated 15% (acceptable practice) – 30% best practice (ed. 2007). B3.2. Provision of on-site renewable energy Final Report 59 31 03 2011
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