About

In Brussels’s Northern Quarter, two elliptical office towers stand out from the surrounding tower volumes. The fully glazed façades offer a beautiful, 360° view of the capital.

Challenge

Strong energy performance was required of these office towers. In addition, the glass façades over the full 19 and 23 floors presented a great challenge for a pleasant indoor climate.

Solution

Angled fins on the east and west façades act as blinds and architectural elements, without blocking daylight. A double-walled façade is provided on the south side. Furthermore, free chilling and free cooling are applied.

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Client(s)

  • Immobel

Architect(s)

  • ASSAR

Award(s)

  • 2019 FEBE Precast Award

Certificate(s)

  • BREEAM Excellent

Location

Brussels, Belgium

Timeline

2015

2021

Expertise Team(s)

  • Façade Engineering

  • M&E Engineering

  • Structural Engineering

  • Sustainable Design

  • View more...

Design Solution(en)

  • Sustainability Assessment

  • Building Simulations

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Offices brussels mobius 7 web

On the south, there is a double skin façade. On the east and west facades, vertical fins function both as solar protection and architectural elements.

Xavier Giraldo

technical director buildings, VK architects+engineers

The Möbius towers distinguish themselves from their angular neighbours in the Brussels North District by means of a completely elliptical form. With 19 (Tower I) and 23 floors (Tower II) above ground, measuring respectively 73 and 98 metres, nearly 62,000 sqm above ground will be realised.

The project is designed to meet passive standards (Brussels Energy Performance Performance 2015) and aims for the BREEAM Excellent certificate. For heating and ventilation, reversible climate ceilings will be used with flexible regulation. The ventilation concept will also use free chilling and free cooling. The fully glazed towers ensure an optimal use of daylight, while highly efficient triple glazing enables a cool working environment. On the south, there is a double skin façade. On the east and west facades, vertical fins function both as solar protection and architectural elements. Photovoltaic panels on the roof make for a sustainable energy source.

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