Post Tower is the headquarters of the logistic company

DHL Group Deutsche Post AG (), trade name, trading as DHL Group, is a German multinational corporation, multinational package delivery and supply chain management company headquartered in Bonn, Germany. It is one of the world's largest courier companies ...

with the two brands: the

Deutsche Post (, ) is a brand of the DHL Group (listed as ), used for its domestic mail services in Germany. The services offered under the brand are those of a traditional mail service, making the brand the successor of the former state-owned mail monopoly ...

postal services and the

DHL DHL (originally named after founders Dalsey, Hillblom and Lynn) is a multinational Import-Export Expert Company, founded in the United States and headquartered in Bonn, Germany. It provides courier, package delivery, and express mail service, ...

logistics service, located in

Bonn Bonn () is a federal city in the German state of North Rhine-Westphalia, located on the banks of the Rhine. With a population exceeding 300,000, it lies about south-southeast of Cologne, in the southernmost part of the Rhine-Ruhr region. This ...

, Germany. Standing at and 41 storeys, it is the sixteenth tallest skyscraper in Germany, and the tallest in Germany outside of

Frankfurt am Main Frankfurt am Main () is the most populous city in the States of Germany, German state of Hesse. Its 773,068 inhabitants as of 2022 make it the List of cities in Germany by population, fifth-most populous city in Germany. Located in the forela ...

. Post Tower was designed by German-American architect

Helmut Jahn Helmut Jahn (January 4, 1940 – May 8, 2021) was a German-American architect, known for projects such as the Sony Center on Potsdamer Platz in Berlin, Germany; the Messeturm in Frankfurt, Germany; the Thompson Center in Chicago; One Libert ...

and won the 2002 Silver

Emporis Skyscraper Award The Emporis Skyscraper Award was an award for architectural excellence regarding the design of buildings and their functionality. The award was presented annually by Emporis, a real estate data mining company with headquarters in Hamburg, Germany. ...

Design

The building is located at the river

Rhine The Rhine ( ) is one of the List of rivers of Europe, major rivers in Europe. The river begins in the Swiss canton of Graubünden in the southeastern Swiss Alps. It forms part of the Swiss-Liechtenstein border, then part of the Austria–Swit ...

and in the center of the old parliament area of Bonn near the ''

Deutsche Welle (; "German Wave"), commonly shortened to DW (), is a German state-funded television network, state-owned international broadcaster funded by the Federal Government of Germany. The service is available in 32 languages. DW's satellite tele ...

'' and has about of office surface. Construction took place from May 2000 to December 2002, with of concrete and 16,000 tons of structural steel used in the building's shell. The building dimensions are; height: , width: , length: (with ring walls ), weight: 300,000 t. The building has the ground floor, 40 upper floors and 5 underground levels. The Tower has a surface area of . The Tower is constructed as a steel-glass-building. The base of the Post Tower has the shape of two staggered

semi-ellipse In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant. It generalizes a circle, which is the special type of ellipse in ...

s of two shifted circle segments. Most office walls, doors and the floors of skygardens and elevators are therefore made of glass used.

Climate control concept

A double-skin glass façade with a cavity between the external skin and the primary façade offers natural ventilation regulated by venetian blinds. The north-facing windows at the front are smooth, the glass windows on the south-facing façade are gently sloping to allow a better flow of air (see picture). Via a decentralized underground convector, the external air is sucked in from the space between the façades, then it is conditioned and fed back into the offices. The air also reaches internal areas of the building through doors and corridors. The office air is filtered into the Sky Gardens, warms up those areas and then is filtered back outside via façade flaps on the east and west sides of the Sky Gardens. The double skin façade enables huge energy savings. The benefits gained by the Post Tower in using up to of groundwater per second to heat and cool the concrete core. The remaining energy requirement is covered by connection to the district heating system, refrigerating equipment and

heat pump A heat pump is a device that uses electricity to transfer heat from a colder place to a warmer place. Specifically, the heat pump transfers thermal energy using a heat pump and refrigeration cycle, cooling the cool space and warming the warm s ...

References

{{Portal bar, Germany, Architecture DHL Group Skyscrapers in Germany Skyscraper office buildings in Germany Buildings and structures in Bonn Buildings and structures completed in 2002 Office buildings completed in 2002 2002 establishments in Germany 21st-century architecture in Germany Modernist architecture in Germany Helmut Jahn buildings