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Most energy efficient.

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A LITTLE OASE: The house is the center of an old villahage on Skøyen. Photo: Alexander Berg jr.

Passive houses in Europe have been a recognized technology for a long time. To Norway it has come first in the last five to ten years. And in a couple of years, we will get a building standard that requires that all new buildings have approximately Passive House Standard (TEK 15).

But as in most other contexts when new land is being broken, there will always be a project that becomes the pioneer, showing the way for the others and in a way, breaking a crack in the dam.

This passive house on Skøyen in Oslo was one such. It was Oslo’s first passive house.

– It was also the first in Norway to build the new passive house standard, Stein Stoknes tells the click. no about the house he built in 2008 and 2009.

– I work as an architect and have been busy with climate and environment for many years. I had seen many similar houses both in Germany and Austria, and I would try it when I built houses myself. It was also an element of idealism that made me start the project.

Stoknes is a daily employee of the FuturBuilt organization, which is a public-private program aimed at demonstrating that climate-neutral construction is possible.

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CLOSED BACK: At the back, the house borders a public open space, and it is expressed through a more closed architecture. The stairs go up to a living room. Photo: Alexander Berg jr.

Compact building body reduces heat loss

The stringent and nude building body of the house rises like an obelic innermost in the over 500 square meter little garden on Skøyen, almost as if it were a left-over monopoly.

And its compact form was a completely conscious choice of Stoknes.

– The more compact a building is, the smaller the energy loss. We have also sought to minimize through avoiding curbs and similar features. And besides, we did not have large plots to build on, he explains.

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Comfortable indoor climate

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ATRIUM: The property consists of a main house that is fully pulled up at the end of the plot, while an outhouse forms the boundary of the neighboring property. Photo: Harald Brekke

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WITH FIND HAND: The house is given a compact shape and gently places itself into the surroundings, which is reflected, inter alia, by the plate that gently slides out of the house as if it were a landing from a ship. Photo: Alexander Berg jr.

A passive housing is characterized by being built without air leaks and equipped with so-called balanced ventilation. This also means that there is a good heat control in the house, and that the air entering the housing is cleaned.

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ALLROM: The house has two family rooms, one on each floor. From the second floor room. Photo: Jiri Havran

A passive house is very comfortable to live in, among other things because you get a steady indoor temperature and avoids cold rays and pulls from poorly insulated windows and utesets, Karin Hagen explains. no. She has designed the house in collaboration with Stoknes and is an architect of Ratio Architects.

– And when the house is also built in solid wood, the wood will have a good moisture regulating effect for the indoor climate.

Our experience is that the indoor temperature stays at an even and comfortable level, and the indoor climate is good, adding to Stoknes, explaining that one of the advantages of building a passive house in massive wood, as it is done here, is to reduce the challenges of cold bridges.

– It happens because you do not use stewards that will be able to lead cold from outside to inside.

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Received inspiration from Germany and Austria

Karin Hagen says that in advance of the project, several people traveled to Austria and Germany to study the principles.

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COMPACT: Area efficiency has been important in designing the home. This is expressed in the passage between kitchen and one of the bedrooms. You have also used sliding doors several places in the house. Photo: Jiri Havran

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THICK WALLS: One characteristic of a passive housing are the thick outer walls that will provide particularly good insulation. Photo: Alexander Berg jr.

– We thought that it should also be possible to get in Norway. But before we started, we had a profitable partnership with an Austrian architect.

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CLEAR LINES: In the design of the home, one was conscious of avoiding unnecessary sources because they could increase the energy demand. Photo: Jiri Havran

Capacity building

The combination of passive houses and solid wood was a new construction method. This meant that not everything was given in advance.

Since we broke new land by using massive trees in a passive house, the project also dealt with a lot about competence building, and it was testing both methods and techniques, says Stoknes.

– And there was some uncertainty, especially the craftsmen were unsure of how they would seize the project. But because they were also curious, the result eventually became good.

– We call the massive passive method, expands Hagen, explaining that the massive box was dressed with a thick insulation layer that was screwed into the triangle.

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Low energy consumption

Consumption of conventional electrical energy is reduced in several ways. First and foremost at the construction of the house with just 30 centimeter insulation, super insulated windows and good sealing. Secondly, solar panels were placed on the roof, which contributes thermal energy to the building in the form of waterborne underfloor heating and hot water. Furthermore, a heating system is installed, and the windows are placed optimally in relation to the directions of the sky.

– The solar panels provide hot water and additions to the floor heating spring and autumn. In winter, when the roof is covered by snow, the energy comes to underfloor heating and hot water from electricity. Energy consumption has been around a quarter of average consumption in Norwegian houses, Stoknes describes.

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A lot of windsurfers: Although it is a passive house with strict energy loss requirements, the housing has extensive use of window surfaces, especially in the façade. Photo: Jiri Havran

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PASSIVE PUSH: A domestic cat must have all passive houses. Photo: Alexander Berg jr.

He adds that if he should have built the house again, he would have drawn it even further towards a zero-energy house.

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BLOMSTERESPALIER: A single fence of barges runs along one side of the property. Photo: Alexander Berg jr.

– I would have used more solar cells than we did because the panels were very expensive at the time.

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Recognized building method

The whole project consists of three elements; the main house of 186 m2, a carport and an outhouse. Everything is organized around a tuna.

When the house was built in 2008 and 2009, challenges faced by the fact that suitable building components were not available in Norway. This included the heat recovery system, the windows and the solar collectors, which were taken from Sweden.

However, that situation has changed significantly and today passive houses have become a recognized construction method in Norway. Costly, it is a small difference from conventional housing.

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SOLFANGER: On the roof there is a solar collector that provides energy for heating of hot water and waterborne heat in the floor. Photo: Alexander Berg jr.

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DISCOVER CLEAN BRUSSELS: Another characteristic of the passive house is that you do not have beams or drawers that run from the outside and into (but end on the outside as here). This is to prevent the creation of cold bridges. Photo: Alexander Berg jr.

– Today it is not significantly more expensive to build passive houses, partly because there has been a market adjustment, explains Stoknes.

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PLAN: Floor plan 1. Ground floor. Photo: Drawing: Ratio Arkitekter AS

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PLAN: Floor plan 2. Ground floor. Photo: Drawing: Ratio Arkitekter AS


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