HHLA (Speicherstadt)
Hamburg Hafen und Logistik AG
Eleven Decks
Hafen City
Wittkoppel, housing cooperative from 1904 e.G.
KAIFU
Neumünstersche Straße
Kursana
Seniorenresidenz Wedel
Högerdamm
Schulenburg-Bau GmbH & Co. KG
Haidstücken
Baugenossenschaft Sachsenwald
Rugenbarg
Expert Engineers



In October 2022, a 24.75 kWp photovoltaic system was installed on the company building, which covers a large part of the electricity demand and contributes to the energy transition. In addition, five company-owned charging stations for electric vehicles are in operation, which are mainly charged with solar power. The company is thus sending a clear signal for ecological sustainability and integrating it firmly into everyday life. The goal is to promote sustainable solutions and play an active pioneering role in the energy transition.



The new building was equipped with energy-efficient, legally compliant building services that combine climate protection and cost-effectiveness. Heat is supplied via a hybrid system combining gas condensing technology and a heat pump. Radiators heat the rooms, and hot water is supplied centrally. Exhaust air systems in bathrooms and kitchens improve indoor air quality. The aim of the design is to reduce CO₂ emissions, ensure compliance with GEG standards, and cut costs in the long term—a future-proof, sustainable building concept.



The new construction project offers future-proof building services with a high level of comfort, energy efficiency, and legal compliance. Heat is supplied via environmentally friendly district heating. Underfloor heating and bathroom radiators ensure comfort. Decentralized ventilation systems with heat recovery ensure good air quality and energy savings. The design meets all current requirements and reduces CO₂ emissions and operating costs—for an economical, climate-friendly solution.



After Legionella was detected, a risk analysis was carried out, which revealed a critical connection between the drinking water and fire water pipes. The cold water distribution system was redesigned, put out to tender, and the implementation was supervised. Hydraulic balancing optimized energy consumption. Regular Legionella testing and ongoing support ensure long-term drinking water hygiene and operational efficiency.



As part of the energy-efficient renovation, the gas condensing boiler was replaced with sustainable district heating. The existing single-pipe heating system was completely converted to an efficient two-pipe system, including new heating surfaces and piping. S&I was responsible for the design and implementation planning, coordination with the utility company, tendering, contract award, construction supervision, measurement, invoice verification, and acceptance of the measures.



To increase energy efficiency and reduce operating costs, modern gas condensing technology and air-to-water heat pumps have been integrated. This reduces CO₂ emissions and supports sustainability goals. S&I offers tailor-made concepts and comprehensive support from an experienced team of experts.



A pilot project for hydraulic balancing of the heating system covering approx. 30,000 m² was launched in the historic Speicherstadt district for HHLA – Hamburger Hafen und Logistik AG. The aim is to optimize heat distribution in the buildings, most of which are supplied with district heating. In addition to energy efficiency, the project also aims to increase comfort in the offices. The planning was carried out by S&I. Implementation is underway, and the effect will be measured during the 2025 heating season.



For WEG 373 Eleven Decks, S&I provides consulting, construction supervision, and quality assurance services to certify the readiness for acceptance of the common property in the areas of heating, ventilation, and sanitation. Its expertise as a court-appointed expert helps to prevent defects or eliminate them efficiently. The project is part of the “Hafencity 15” development plan in Hamburg.