EGS-plan GmbH

• Thermal Insulation and Energy Balancing
• Sound Insulation
• Room Acoustics
• Structural Engineering Consulting
• Building Physics Measurements
• Sustainability Certification
• Existing Condition Analysis and Renovation Needs
• Simulations

• Energy and Engineering Concepts for Design Competitions
• Energy Concepts for Residential and Nonresidential Buildings (New Construction and Renovation)
• Energy concepts for neighborhoods, cities, and regions
• Municipal heating planning
• Simulations
• Primary energy assessment of district heating systems
• Support and Implementation of Energy Performance Contracting Measures

• Contracting and Operator Bids
• Market Research
• Procurement Management
• Feasibility and Potential Studies
• Energy Management System in accordance with DIN EN ISO 50001
• Design of energy-saving measures – Sections 8, 9 of the Energy Efficiency Act (EnEfG)
• Committee work on renewable energy
• District and Local Heating Consulting
• Cost and Emission Allocation in Accordance with the CO₂ Cost Allocation Act (CO₂KostAufG)

• Building Energy Concepts
• Simulations
• Certifications
• Technical Monitoring

• Residential and Nonresidential Buildings
• Sewage, water, and gas systems
• Heating systems
• Ventilation systems
• Usage-specific systems
• Overarching MSR building automation
• Quality Management and Facility Monitoring
• BIM – Building Information Modeling
• Hydrogen production

• Residential and Nonresidential Buildings
• High-voltage electrical systems
• Photovoltaic systems
• Battery storage
• Charging infrastructure for electric vehicles
• Telecommunications and information technology systems

The Mannheim National Theater is the largest theater in the Rhine-Neckar metropolitan region and one of Germany’s most important four-genre theaters. The current building dates from the 1950s, is a designated historic landmark, and has been undergoing extensive renovation and technical upgrades since 2022. Following an intensive planning phase that began as early as 2016, a future-proof theater is taking shape that meets both the high artistic standards and the technical and energy-related challenges of a modern cultural institution. Completion of the construction work is realistically scheduled for 2028; the project budget now stands at approximately 330 million euros.

EGS-plan has been responsible for building physics planning, the complete renewal of the building’s technical systems, and key verification and quality assurance processes for this complex large-scale project since its inception. The retrofitting of the building envelope is being carried out in accordance with strict historic preservation guidelines, while spatial, energy-efficiency, and acoustic optimizations simultaneously bring the theater’s functionality up to contemporary standards. The design of the ventilation system is particularly challenging, as the building, with its diverse uses, requires a total of 43 ventilation systems. The entire electrical and stage technology is also being comprehensively modernized and adapted to today’s operational requirements. The connection to the existing district heating system will be retained and efficiently integrated into the new energy concept.

A particular focus is on the redesign of the orchestra rehearsal hall, which was completely reconceived due to inadequate acoustic conditions. The hall was excavated approximately six meters deeper into the existing structure to create a significantly larger volume and reduce the previously extremely high sound levels. The new modular construction method allows surfaces with varying degrees of absorption to be strategically arranged, while sloped and curved surfaces ensure optimized reflections and diffusion. In addition, flexible room acoustics with adjustable curtains allow the space to be adapted to different ensemble sizes. As a result, the hall meets today’s requirements for both working conditions and room acoustics while also featuring a gallery from which rehearsals can be observed and experienced.

In addition to specialized planning, EGS-plan also conducts tests for hazardous substances, building physics quality controls, and blower-door tests. The close integration of building physics, HVAC, and electrical engineering, along with special consideration of the framework conditions for historic preservation, make this project one of the most challenging cultural building renovations of recent years.

The Baden-Württemberg State Parliament was built in 1961 and is located right in the heart of the state capital, Stuttgart. Between 2013 and 2016, the building underwent a comprehensive renovation and expansion. EGS-plan was commissioned in the spring of 2016 to provide technical monitoring (TMon) services during the building’s operational and usage phases. The goal was to evaluate the building’s energy balance, assess the ongoing operation of the technical systems, and improve energy efficiency. At the same time, indoor comfort was to be analyzed and maintained. Technical monitoring was used by the state of Baden-Württemberg as a quality assurance tool.

In full accordance with the AMEV recommendation “Technical Monitoring” published in 2020 and VDI 6041:2017-07 “Facility Management—Technical Monitoring of Buildings and Building Services Systems,” all aspects of comfort, systems, and energy monitoring were included.

“Technical monitoring for quality assurance is intended to make a decisive contribution to creating the conditions for energy-efficient, functional, and needs-based operation of the building and—upon its completion—the ‘Citizens’ and Media Center’ addition.” — Property and Construction Department in a letter of reference for EGS-plan.

For four years, EGS-plan monitored and optimized the operation of the building services systems at the Baden-Württemberg State Parliament following its comprehensive renovation in 2016. The result: Annual final energy consumption dropped by a whopping 22%. This translates to a high five-figure reduction in energy costs and_{CO2 emissions} per year.

The city of Freiburg aims to achieve full climate neutrality by 2050. The development of the new urban district presents a unique opportunity to incorporate sustainable and climate-neutral urban development into the design and planning from the very beginning. In the run-up to the announcement of an urban planning competition, the requirements for an energy concept were therefore developed. The new urban district is characterized by a central area featuring a mixed-use mix of multi-story residential buildings and commercial spaces.

Dietenbach is to become a climate-neutral and vibrant neighborhood with short distances, open spaces, schools, sports facilities, daycare centers, and shopping options. The design is dominated by open, four-story block-edge structures, though taller buildings are also planned for certain areas, such as the center.

The first step involved an analysis of the current situation, including an assessment of energy demand for heating, cooling, electricity for building occupants, and transportation. Residential buildings must meet the Freiburg Efficiency House Standard 55.

As part of the potential analysis in the second phase, the local energy infrastructure was examined, and solar energy, wastewater heat, geothermal energy, and district heating were identified as the primary local renewable energy sources. Three energy supply options—including local heating and cooling networks—were developed and optimized for the respective building structures. The components and technologies included are combined heat and power (CHP), wood chips, heat pumps, photovoltaics and battery storage, solar thermal systems, and long-term heat storage. In addition to CO₂ emissions, the degree of self-sufficiency and self-consumption were also determined as evaluation criteria. The results lead to recommendations regarding the framework principles for the urban planning competition.

Southeast of Leutkirch in the Allgäu region, a new Center Parcs vacation park has been built on the 184-hectare site of a former ammunition depot. At the heart of the newly built vacation park is the central building, which houses the subtropical water park Aqua Mundo, a spa and country club, a wide range of entertainment options, and restaurants. Spread out across the grounds, 1,000 vacation homes accommodate guests.

In a multi-stage process, EGS-plan worked with the investor team to develop a utility supply concept that meets both environmental and economic goals. Heat for the facility is supplied by a heating plant equipped with a 2 MWel combined heat and power (CHP) unit and three 5 MW peak-load boilers. The central building and the vacation homes are supplied with heat via a 30 km-long local heating network. The heat supply—including planning of the energy center starting from design phase 4—as well as financing, implementation, energy procurement, and operation of the energy center, the district heating network, and 1,000 heat transfer stations were put out to bid as part of a contracting tender and awarded to an external service provider.

As a result, a district heating network was implemented at a Center Parcs resort for the first time. With the help of this internal pilot project, insights can be gained and applied to develop further climate-beneficial, climate-friendly, and economically viable district heating networks in vacation parks. Through the contracting tender, the client was able to outsource investments and other tasks beyond its core business and place them in the hands of professional service providers. Through this project, the park benefits from significant_{CO2 reductions} achieved through highly efficient heat supply, as well as a high level of supply security and reliability due to minimal troubleshooting and downtime.

The 150-meter-long and just under 9-meter-deep lot along Speicherstraße naturally did not allow for a compact—and thus energy-efficient—building, but only for an extremely elongated one. Nevertheless, the Efficiency House PLUS standard was achieved. A building meets this standard when it generates more energy on the lot than its residents consume.

A total of 74 apartments have been built across eight stories, along with two stores and a car-sharing station on the ground floor. Structurally, the building is a partition-wall construction with load-bearing walls and reinforced concrete floor slabs. The street-facing facade is articulated by light-colored, solid parapet bands and a subtle undulation, while the rear courtyard facade is predominantly solid with individual balconies. The facade itself consists of prefabricated elements constructed using a wood-frame system. On the courtyard side, rear-ventilated fiber-cement panels are installed, while on the street side, windows and photovoltaic panels alternate between the long parapet bands. The Active Townhouse has a net energy surplus in terms of both final and primary energy. Thanks to high-performance thermal insulation combined with highly efficient ventilation systems featuring heat recovery, the heating energy requirement is approximately 18 kWh/m²a.

The Active Townhouse is an “electricity-only” building. Heat for heating and domestic hot water is provided by utilizing wastewater heat via an electric heat pump. Heat is distributed via a low-temperature heating circuit for the radiant floor heating and an additional heating circuit with a flow temperature of approximately 55°C for hot water. All electricity for heating, ventilation, lighting, and resident use is generated from renewable sources via a PV system with high-performance modules integrated into the roof and facade. Detailed monitoring, electricity load management with networked household appliances, and carsharing are also integral parts of the building’s energy concept. The apartments are rented with a free allowance for heat and electricity and are equipped with particularly energy-efficient appliances and a digital user interface.

Awards:

Intersolar AWARD 2015, European Solar Project

European Solar Prize 2015, “Solar Architecture and Urban Development” category