Gullhaug Torg 2A in Nydalen is Norway's first naturally ventilated office and residential complex with a revolutionary low energy solution for heating and cooling. The building is a 10,000 square meter (108,000 square feet) combination building consisting of 5,000 square meters (54,000 square feet) of residential space, 4,500 square meters of offices (48,000 square feet), and 500 square meters (5,400 square feet) of shops. It is expected to be completed by 2020.
The Norwegian builder AVANTOR has high ambitions for the project, but also the contractor SKANSKA and the architects Snøhetta are constantly looking for opportunities to raise the bar. With a Triple-Zero ambition, the aim is to demonstrate that natural indoor climate control of buildings can be achieved with 0kWh purchased energy for ventilation, heating, and cooling.
By utilizing the thermal mass of the building and making the facade "intelligent", it will be possible to keep the indoor climate and temperature at a comfortable level year round. This is done by using automatic natural ventilation on the 1st through 6th floors within the eighteen floor complex.
The intelligent natural ventilation solution from WindowMaster utilizes the natural forces inside and outside of the building, allowing the facade windows to open or close when needed to achieve a comfortable indoor climate with fresh air. The system monitors wind speed and direction on the facade, internal and external temperature, and indoor CO2 levels.
Additionally, diffuse air intake is used in high-end meeting rooms all year round, providing a fresh and comfortable indoor environment even in winter. In summer, the air is supplied directly through the automatically controlled windows that are located high in the façade. While in winter, air enters through high-pitched automatic dampers in the ceiling. These high-pitched dampers eliminate uncomfortable drafts on cold days.
Terje Løvold of AVANTOR states why they chose automatic natural ventilation:
“The goal is to demonstrate that the indoor climate should be just as good when using natural ventilation in comparison to traditional mechanical ventilation. Physiological studies show that small temperature fluctuations without discomfort or draught are positive for the occupants. Air that enters directly through the facade will be perceived as fresher compared to air that passes through a mechanical ventilation system. Other advantages are that the construction of the building can be carried out faster as there are no technical installations to be performed. In addition, a higher floor to ceiling height can be realized with natural ventilation as there are no need for ducts."
Tor Helge Dokka, chief advisor at Skanska says:
“WindowMasters competence and expertise has been crucial for the development of the natural ventilation solutions we have utilized in the Gullhaug Torg”
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