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The test house in Sandnes supplies itself with the energy it needs.

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Passive and active houses are words that all hopeful builders can only learn the meaning of.

Just because the authorities want all new Norwegian homes to become passive houses by 2020.

This development towards environmental housing has been going on for some years.

Energy-saving items

The property in Sandved, Sandnes building site satisfies the stipulated Passivhustandarde.

It also has some active technical elements that will work positively for the indoor climate.

These measures have been developed because the appeal against passive houses has been that they may become too dense and too hot during the summer.

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THE ACTIVE ENVIRONMENT HOUSE IS BUILDED IN CENTRAL: It is claimed that the Isobo test house from Jadarhus with the large windows and solar panels on the roof is Norway’s first passive house with active elements and with the agreement to deliver any surplus energy to others. The house is located in an area of ​​82 other low-energy homes of different types. Photo: Producer

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OVERLIGHT EXTENDS THE HOUSE: With superlamps and more levels, the dwelling is perceived as visually larger than it actually is. Photo: Producer

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GREAT WINDOWS: Energy-efficient houses may have large windows. Photo: Producer

Exporting energy to others

In addition, this Sandnes house produces energy using solar collectors and solar cells.

And during periods of energy surplus, this extra solar energy can be delivered straight on the power grid for the benefit of other homes.

The only one with energy agreement

– This is the first Norwegian residence that has such an agreement with a power supplier, says Per Jæger, Managing Director of Housing Manufacturers Association, to Bonytt. no.

He also says that the housing industry is now in a learning process with regard to passive and active housing.

It will last for some years, and the important thing is to find the right answers to some technical challenges, “says Per Jæger, indicating that they have several pilot projects in Rogaland, among other things..

The future determines what works

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VIEW OF MANY RIGHTS: The active passive house Jadarhus Isobo has many windows of limited size. Photo: Producer

– In this pilot project in Sandnes we focused on several, partly overlapping measures. And we leave for the future to show which of these are viable and sustainable, “says project manager Kurt Hobberstad in Jadarhus.

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This house makes more energy than it uses

He shows that the house is cooled down with computer-controlled sunshades and ditto skylights. They are opened and closed after input from two external weather stations.

Solar heat from the south

The windows towards the south make the house solar, especially in the summer, and the solar panels on the roof contribute significantly to the hot water. It supplies the house with both tap water and hot water for radiators.

Heat pump and preheat system complete the plant

The rest of the heating requirement in the house is covered by air-to-water heat pump. In addition, all air is heated to the house in winter in a 100 meter laid pipe which is dug just under the house.

On hot summer days, this system cools the air to the house a few degrees.

Passive housing with flexible automatic control

Pourya Shafizadeh lived in this special house during a test period this fall and was pleased to stay here.

– I could even control the lights, indoor temperatures and windows in my house, whether at home or on vacation, he says to

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Is this the northernmost crucifix?

Super isolation makes the hassle

He also shows that if you study the window frames, especially at the ceiling windows in the attic, you can see how thick and good the insulation this house type has. This helps reduce the heat loss from the dwelling to a minimum.

What is a passive house?

The Norwegian passive housing standard is found in NS 37000: 2010, and it indicates that a passive housing needs to halve the energy requirement in relation to a traditional housing.

This halving is achieved, for example, with additional insulation, tight construction, balanced ventilation systems with high efficiency heat recovery, super insulated windows and doors, as well as utilization of solar energy, energy saving control systems and energy efficient electrical equipment.

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A ENVIRONMENTAL HOUSE: The many many and completely open levels and ditto windows do not prevent this being a house with minimal heat loss. Photo: Producer

Many roads to Rome

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This cabin is world class architecture

Guro Nereng, Bellona’s expert in energy efficiency, is excited about the development of passive houses and energy-rich homes.

She thinks houses with their own energy production will increase and state that solar heating of water to radiators, underfloor heating and tap water can in many cases be installed at an affordable price already today.

She thinks it is very important that passive houses are listed correctly. Experiences from the foremost in the industry show that focus on quality in the construction phase of passive houses also reduces the number of common construction errors.

The government’s demands for new buildings will be tightened against what is called passive house level, that is, a very low energy requirement, Guro Nereng concludes, which calls for more building methods to be brought down to this particular level.

What is the price of the passive house?

Kurt Hobberstad believes that the building cost of a passive / active house will be approximately. 10 per cent above traditional residential buildings.

Considering the savings achieved with reduced energy costs, it does not take long before the total accounts of the passive housing are in line with ordinary houses, he claims.

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Here you will not receive electricity costs

ENERGY SAFETY: The so-called earth collector underneath the house preheats the air in the balanced ventilation system in winter, and in the summer it cools the air that is released into the house. All roof and facade windows to the south have exterior sun shade, and all skylights have an interior blinds curtain. It dampens heat loss in winter. Windows to the east, west and north have heat-insulating glass. The solar panels on the roof make the house almost self-sufficient with energy. In principle, all power is sent on the net to light energy, and it is settled against the consumption in the home. Insulation and other construction technical details have been carried out in accordance with the state passive housing standard. Photo: DRAWING: Producer

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