BNB criteria

In order to map the entire life cycle of a building, the BNB has a modular structure. The modules reflect the life cycle phases also described in the Guideline. In the Assessment System for Sustainable Building, the requirements of the Guideline for Sustainable Building have been translated into assessment criteria and benchmarks in order to create a clear target and make the fulfillment of these targets measurable and assessable. Various system variants are available:

• Office and administration building
• Classroom building
• Laboratory building
• Outdoor facilities

If none of the existing system variants apply to a project, it is possible to apply the BNB analogously.

• New construction module: Principles of sustainable construction and implementation of sustainable construction measures
• Utilization and operation module: Recording and evaluation of the specific property quality and the quality of the usage and operating processes. As-is analysis of an existing building that has not yet been assessed according to sustainability criteria is also possible
• Complete modernization module: Sustainable building and implementation of sustainable building measures in existing buildings, taking into account the principles of sustainable building

Criteria profiles in the assessment system for sustainable building

The BNB provides measurable and verifiable criteria, which are divided into five main criteria groups and the site characteristics are categorized. This systematic approach enables a transparent and comprehensible assessment of the sustainability of construction projects. The criteria are based on the Protection goals of sustainable buildingderived from the three dimensions of sustainable building: Ecology, Economy and Socio-cultural. The basis for the assessment is the national criteria catalog, which was developed with construction industry associations at the “Round Table on Sustainable Building” of the Federal Ministry of Construction.

The evaluation system is structured in three levels:

Main criteria groups,

Criteria groups

and individual criteria.

The main criteria are derived from the five qualities of sustainability and the site characteristics. The location characteristics are assessed separately from the property quality and are only shown for information purposes, as the project managers only have limited scope to exert influence.

The individual criteria are assessed by awarding evaluation points. A maximum number of 100 points can be achieved in each criterion. The results are combined with a fixed significance factor of 1 to 3 within the respective main criteria group. The degree of fulfillment within a main criteria group is calculated from the ratio of the maximum achievable score to the actual score. The results of the five main criteria groups are then combined with a defined weighting to give an overall degree of fulfillment.

Minimum compliance levels are set for the criteria, which must be met. Depending on the overall degree of compliance, the building is awarded the quality standard gold (100% – 80% degree of compliance), silver (80% – 65% degree of compliance) or bronze (65% – 50% degree of compliance). An overall grade is also awarded for illustrative purposes.

Criteria profile using the BNB-BN example ( new office building) V2015

Ecological quality

Effects on the global and local environment

.. Accounting rules for the preparation of life cycle assessments

1.1.1 Global warming potential (GWP)

1.1.2 Ozone depletion potential (ODP)

1.1.3 Ozone creation potential (POCP)

1.1.4 Acidification potential (AP)

1.1.5 Over-fertilization potential (EP)

1.1.6 Risks for the local environment

1.1.7 Sustainable material extraction / biodiversity

Resource utilization

1.2.1 Primary energy demand

1.2.3 Drinking water requirements and wastewater volumes

1.2.4 Land use

Economic quality

Life cycle costs

2.1.1 Building-related costs in the life cycle

Economic efficiency and value stability

2.2.1 Space efficiency

2.2.2 Adaptability

Socio-cultural quality

Health, comfort and user satisfaction

3.1.1 Thermal comfort

3.1.3 Indoor air hygiene

3.1.4 Acoustic comfort

3.1.5 Visual comfort

3.1.6 Possibilities for users to exert influence

3.1.7 Quality of stay

3.1.8 Security

Functionality

3.2.1 Accessibility

3.2.4 Accessibility

3.2.5 Mobility infrastructure

Ensuring design quality

3.3.1 Design and urban development quality

3.3.2 Art on buildings

Technical quality

Technical design

4.1.1 Noise protection

4.1.2 Heat and condensation protection

4.1.3 Cleaning and ease of maintenance

4.1.4 Dismantling, separation and recycling

4.1.5 Resistance to natural hazards

4.1.6 Ease of operation and maintenance of the TGA

Process quality

Planung

5.1.1 Project preparation

5.1.2 Integral planning

5.1.3 Complexity and optimization of planning

5.1.4 Tendering and awarding

5.1.5 Requirements for optimal management

Construction

5.2.1 Construction site / construction process

5.2.2 Quality assurance of the construction work

5.2.3 Systematic commissioning

Location features

Location features

6.1.1 Risks at the micro-location

6.1.2 Conditions at the microsite

6.1.3 Neighborhood characteristics

6.1.4 Transport connections

6.1.5 Proximity to facilities relevant to use

6.1.6 Relevant media / development