Sustainability and green
For in-depth information on sustainability aspects of this project, please view the related Sustainability case study in PDF.
Buildings account for 40 percent of society’s energy consumption. Energy requirements for Entré Lindhagen will be 50 percent below the levels set by the National Swedish Board of Building, Planning and Housing’s (Boverket) for new builds.
Our ambition is to create the greenest building ever. We are therefore particularly proud that Entré Lindhagen is pre-certified to the highest level, Platinum, in accordance with the international LEED environmental rating system. The building will also fulfill the requirements for EU GreenBuilding and Sweden Green Building Council environmental certification.
Patent pending for climate system
The building will be self-sufficient in relation to cooling thanks to Deep Green Cooling, a climate system with a slow flow of air for which we have a patent pending. We will utilize the rock underneath the building by drilling 144 holes to a depth of about 200 meters through which we will circulate a volume of water. This allows us to extract cooling during the hot months of the year, thus ensuring low energy usage and high air quality.
In the winter, the system is filled with cold air at the same time as we pre-heat the intake air to the office. The system uses the rock’s natural temperature of about 10 degrees Celsius, thus eliminating the need for energy-intensive cooling or heat pumps.
We also operate a larger ventilation assembly and channels to achieve a slower flow of air. In this manner, we use less electricity to power the fans in the assembly and the flexibility of the premises is also enhanced. Magnus Hellsten, Project Manager, explains:
“It’s no problem if the tenant wants to make changes to the premises. No major remodeling work of the system is required to make the transformation from, for example, an open-plan to a partitioned office or conference room and meeting rooms. Such changes impose demands on both the ventilation and the cooling requirements, but we have already made reservations for these eventualities in our system. The large and slow-moving air flows provide more flexibility. Large assemblies with lower flow rates mean that we need less energy to operate the fans.
Natural daylight in demand
The work environment for those occupying the premises is important. A substantial amount of natural light enters the building, but the problem with this is the accompanying heat from the sun. This is why the façade will feature a solar screen.
“We have also worked with lighting that is similar to a cloudy sky. If you try to imitate daylight as much as possible, it becomes more natural for the body. The hormone melatonin is affected by the colors in the light. We have chosen a color scale at 4,000 Kelvin, which gives a more natural light.”
Windows reused in Estonia
The out-of-date and energy-intensive building that once stood on the site was demolished. A full 85,000 tons of material came from the compact building and we recycled about 95 percent of the building material. For example, some of the old windows are now installed in a building in Estonia.
We are also working to minimize water consumption by, for example, installing water-saving toilets and mixer taps. We help tenants to select environmentally sound materials and, of course, it should be easy to sort at source.
Entré Lindhagen is located close to bus routes and two subway lines, making it easy to commute to and from work using public transport.