EnEV verification I energy certificates I summer-related thermal protection I thermal bridge calculations
We create thermal protection certification for new buildings and modernisation based on current standards and regulations (EnEV I DIN 4701 I DIN V 18599). These calculations serve as a planning optimisation instrument for the reduction of energy requirements and operating costs. The specifications are based on the legally required stipulations of the building authorities and – if required – the funding guidelines of the KfW or IFB bank. Within the framework of sustainability certification (DGNB I BNB I NaWoh I HCH), the certificates are modified upon completion to comply with the object that has been built and therefore brought into line with anticipated energy requirement values.
3D computer model
The purpose of thermal building simulation is to evaluate the level of comfort in a building. This instrument is to be applied in particular during the early planning phase, in order to align influential factors and interaction of the marginal conditions (building shell, sun protection, ventilation concept and behaviour, room volumes, occupancy rates) optimally with the needs of the future occupant. The 3D computer model indicates how the overall building or individual components react to specific climatic conditions. The results make it possible to optimise the planning and evaluation of interior comfort according to DIN 4108-2 and DIN EN 15251 as well as verification management based on the evaluation systems DGNB, BNB and LEED.
3D computer model
The central instrument for the evaluation of the energy efficiency of a building and the minimum requirements of LEED is the creation of an integrated building and plant simulation system. This so-called Energy Model corresponds to the requirements of ANSI/ASHRAE/IESNA standard 90.1 and is implemented by means of a validated simulation program according to ANSI/ASHRAE standard 140. Taking into consideration the agreed energy tariffs (depending on location, project and operator), a forecast for the expected energy costs is made, taking into account plant and process technology as well as the quality of the building shell. The objective is optimisation during the planning process with corresponding advantages for later operation of the building.
Quality assurance instrument
In the case of buildings from approx. 4,500 sqm gross floor area, LEED requires a Commissioning Agent, in short CA, who is an independent consultant with experience in the monitoring of LEED projects. In this capacity, we conduct examinations and provide documentation to ensure that all energy-related systems comply with the planning specifications and fundamental evaluation as well as the required functionality and performance capability. So-called Fundamental Commissioning serves to support the builder-owner with the formulation and transformation of the planning task, the development of a so-called Commissioning Plan, formulations and tender specifications together with participation and documentation as part of the commissioning process. This service can be extended if required.
Life Cycle Costing (LCC)
The greatest proportion of the overall cost of a property over its life cycle is attributed not to production, but to operating costs (energy, cleaning, maintenance), whereby follow-up costs offer significant savings potential and influence the value stability of the property (greater real estate value when selling and lower vacancy risk). The present-value method which we apply corresponds to ISO 15686-5:2008 and the requirements of DGNB. The calculation basis is formed by selected manufacturing costs of the cost groups 300 and 400 together with selected utilisation costs according to DIN 18960 and VDI 2067. This instrument is deployed during the planning phase to reduce operating costs and for the amortisation calculation of structural measures.
Life Cycle Assessment (LCA)
Buildings cause emissions during their life cycles (production, utilisation, demolition and recycling). These emissions are transferred to the air, water and ground, thereby contributing to climate change (increase in global warming potential, destruction of the ozone layer, summer smog, dying forests, fish mortality and over-fertilisation of the soil). The objective of the Life Cycle Assessment is the reduction of this influence by means of advance planning. This can mainly be achieved through the use of highly-efficient construction methods, renewable energies and recycled (or recyclable) building components. For this purpose DGNB offers specifications for a comparable evaluation.
Planning instructions I tendering criteria I construction site inspections I ambient air measurements
The primary characteristic of a user-friendly building is healthy indoor air quality that is low in harmful substances, odours and emissions. These factors are taken into consideration in various sustainability systems such as DGNB, LEED, HCH, NaWoh, BNB and WELL. Irrespective of whether or not this objective is pursued on the part of an owner-occupant as a certification component or for the purpose of quality assurance, we will assist you from planning right up to final documentation, for example, through the preparation of guidelines and tendering criteria for material selection, construction site controls, material release as well as the organisation of harmful substance measurements as verification for successful implementation.
3D computer model
Daylight is an architectural design element with a major influence on user wellbeing and productivity. With the aid of simulation, the supply of daylight can be evaluated for a room or building of any geometric form. The need for artificial light can be determined and the effects of glare avoided. Along with facade features and colouring of the interior, shading caused by surrounding buildings is taken into consideration. The evaluation is carried out using colour graphics of light distribution, daylight ratios and the daylight supply factor. The instrument also serves the purpose of verification management within the framework of sustainability certification according to DGNB or BNB.
§§ 8 et seq. Energy Services Act (EDL-G) I DIN EN 16247-1
Before December 5th 2015, all non-SME companies must have carried out an energy audit according to §§ 8 et seq. EDL-G and DIN EN 16247-1. Consequently, companies will be under obligation to conduct a new audit at least every four years. As registered consultants at the Federal Office of Economics and Export Control (BAFA), registration no. 210513, we can support you by carrying out a comprehensive evaluation of the relevant locations while cooperating closely with local facility management. We analyse and validate the results from which we derive possibilities for energy efficiency improvement. We suggest appropriate measures and create a work schedule for implementation as well as carrying out economic feasibility studies and providing information on possible applicable grants.