Energy and Sustainable Development

Authors:

Claudia Enzi,

Gisela Fuchs,

Daniela Gramer,

Florian Ortner

(SS 11)

2006 the Austria parliament passed the “Bundesgesetz über die Pflicht zur Vorlage eines Energieausweises beim Verkauf oder und bei der In-Bestand-Gabe von Gebäuden und Nutzungsobjekten (Energieausweis-Vorlage-Gesetz – EAVG)“

European law implemented into domestic law

Federal legal situation in Austria -> nine different building laws which regulate the energy performance certificate

Federal state law regulates standards for new buildings, annex, and extensive improvements as well as calculation, contents, desgin, and competence to create the energy performance certificate

Calculation models are different in all nine provinces

Most important index: specific heating demand (Spezfischer Heizwärmebedarf HWB (Energiekennzahl))Comparison value, which describes the

thermal quality of the building envelope

Unit: kilowatt hours per square meter and year (kWh/m2a)

in relation to the reference location specific heating demand (Spezifischer

Heizwärmebedarf HWB (standortbezogen))

Needed heat for hot water, Needed energy for heating technology (Warmwasserwärmebedarf WWWB, Heiztechnikenergiebedarf HTEB)

Final energy demand (Endenergiebearf)

gross-buliding area Compactness (Kompaktheit) Climate region Climate data U-data

Advantages of the energy performance certificateTransparency on the real estate marketComparability

Founded by Sustainable Building Association (in German DGNB) in collaborative partnership with the federal ministry of Transport, Building and Urban development (2007)

DGNB Association looks for solutions and measures to realize sustainable buildings

Advantages of “Deutsches Gütesiegel Nachhaltiges Bauen:Quantitative accountabilityRisk-minimizing planningFocus especially on the life cycleAdapted to German standards and

construction planningMarketing toolVisibility of high quality of the buildingEvaluation of the performance of a buildingAdaptability to new technological realities

Methodical basis of the system originally developed for new buildings for office and

administrative Now, various evaluation systems for other types of

buildings The evaluation system includes six areas, 49 sub-

criteria and a weighting factor: Ecological quality (22,5 %) Economic quality (22,5 %) Socio-cultural and functional quality (22,5 %) Technical Quality (22,5 %) Process quality (10 %) and Quality of the location (the evaluation is separately)

Label is avalable in: 50 %, the certificate is hand over in bronze 65 %, the constructor gets the label in silver 80%, the building receives the highest award, in gold.

internationally-recognized green building certification system

developed by the U.S. Green Building Council (USGBC) in 1998

A point based system (LEED points) LEED was created to:

define "green building" by establishing a common standard of measurement

promote integrated, whole-building design practices

recognize environmental leadership in the building industry

stimulate green competition raise consumer awareness of green building

benefits transform the building market

Economic benefits of LEED: Reducing of the maintenance costs reduced Reduced liability, risk management cost savings measures Increased building valuation, optimize life-cycle

economic performance Marketing advantages

Certification benefits of LEED: Third party validation of achievement state and local government incentives knowledge base of energy and environmentally

responsive buildings LEED certification plaque to mount on building Receive marketing exposure through USGBC

Website Official certificate

The different rating systems for New Construction and Major

Renovations (NC) for Existing Buildings: Operations &

Maintenance (EB: O&M) for Commercial Interiors (CI) for Core & Shell (CS) for Schools (SCH) for Retail for Healthcare (HC) for Homes for Neighbourhood Development (ND)

Seven LEED credit categories (five key areas and two additional fields):Sustainable sites (SS)Water efficiency (WE)Energy and Atmosphere (EA)Materials and Resources (MR)Indoor environmental quality (IEQ)

Innovation in Design (ID)Regional Priority (RP)

100 possible base points plus an 6 points for Innovation in Design and 4 points for Regional Priority Certification by the following scale:

Certified 40–49 pointsSilver50–59 pointsGold 60–79 pointsPlatinum 80 points and above

the first available assessment tool for buildings, developed in 1990 in the United Kingdom

operated and launched by the Building Research Establishment (BRE)

the first available assessment tool for buildings, developed in 1990 in the United Kingdom

operated and launched by the Building Research Establishment (BRE)

Was primarily used as an assessment tool for office buildings

more than 200.000 buildings rated yet for existing as well as for new buildings

a set of framework standards for the sustainability assessment of buildingsBS EN ISO 17024 (for BREEAM assessors)BS EN 45011 (for BREEAM assessment

processes) ISO 9001 (for all BREEAM related activities)

BREEAM is built upon several principles: Measure the impact of the Environmental The application of quantified measures. Provide a flexible approach. Use of best available science and best practice Integration of all three dimensions of sustainability

– economic, social and environmental aspects The framework of assessment should include the

‘local’ link to regulation, climate and sector. Experts in the field of construction are integrated

both in the development and operational processes.

third party certification Minimization of costs. Stakeholder involvement.

Categories and their environmental weightings:Energy (19 %), Transport (8 %), land use and ecology (10 %), health and wellbeing (15 %), Water (6 %), Waste (7.5 %), Materials (15.5 %), Pollution (10 %), management (12 %) and Innovation (10 %)

BREEAM ratingOutstanding ≥ 85Excellent ≥ 70Very good ≥ 55Good ≥ 45Pass ≥ 30Unclassified < 30