From 2021, all new buildings in Europe to be so-called near-zero energy house. What it will mean in terms of energy requirements for new buildings Building and Planning has recently presented a proposal.
Under the proposal, a house built in Stockholm only have 80 kilowatt hours per square meter per year.
Men already when the proposal was submitted was Energy Agency so critical that it could not endorse it, even though it was the government’s express wish. Above all it was the limit for the energy to be counted, the so-called system boundary, the Energy Agency was opposed.
The system limit in the proposal means that it is the amount of energy purchased for the building to be counted. This is also the current building regulations are formulated.
Now, the proposal has been circulated for comment, and many of the bodies consulted also turns against the system limit ” purchased energy “and would rather that building regulations should be based on the amount of energy used in a building.
For example, points out Passivhuscentrum Västra Götaland to building regulations with the system limit of purchased energy leads to poorly constructed houses can be compensated with the heating system that involves large withdrawals of natural resources.
Even the Swedish Bioenergy Association , Svebio, is highly critical of the system limit in the proposal:
– By calculating the energy consumption of “energy purchased” favors the building regulations heat pumps. The rule penalizes simultaneously heating and use of biofuels such as pellets. We should instead focus on building houses that have the lowest possible energy use, says Gustav Melin, President of the Swedish Bioenergy Association, in a press release.
HSB and the association Byggherrarna advocates energy requirements should be based on the energy actually used in a building, mainly to requirements which are technology-neutral. “(Energy requirements) shall be limited to formulating the technical capacity requirements of the building. This means that questions about how energy is produced, distributed and possibly stored shall not be treated in energy requirements, “write the developers.
Both HSB and Passivhuscentrum think that energy requirements will be complemented by a värmeförlusttal, to a building’s heat loss through ventilation, walls and sewers, should not be too large. In this way the buildings get an envelope of good quality while density and ventilation losses are regulated, arguing Passivhuscentrum.
A consultative body which, however, keeps even if the Board’s choice of system boundary is the Swedish National Testing and Research Institute.
Houses manufacturer BWG Homes where Myresjöhus and SmålandsVillan included, believe that Boverket the proposal would lead to significant cost increases that are not justified by the few kilowatt hours you get in less consumption.
Although Clients are concerned about increased costs. The developers estimate that the proposal will increase costs by about ten percent.
BWG Homes also lift the hot water as a parameter affecting the real energy numbers but the house manufacturer has been difficult to have any influence. “The lower energy requirements, the greater part of the energy is used to heat hot water, which means that there is room for energy to heat,” the company writes.
Moreover, BWG Homes that today there is too little research into the possible risks of moisture when the energy requirements ports at the levels Boverket suggests.
In connection with the referral bodies have submitted their comments on the Board’s proposal for energy demands, many people complain that in the present situation is essentially no monitoring of buildings’ energy use. NCC writes in her contribution that there is no incentive to follow the building rules and calls for a sharper control: “Today is done virtually no oversight of the energy requirements and therefore risks a tightening not have imagined the impact.”
BWG Homes out that many homes do not live up to the requirements that exist today. “Should these low levels take effect, we are confident that we can do that in the other Nordic countries, introducing theoretical calculations and do not follow up other than for purposes of study,” the company writes in its response.
Passivhuscentrum notes that there is no system for sentencing if energy requirements are not met and Byggherrarna notes that from a competition standpoint is important that energy use is monitored so that no rogue actors benefit.
The government will take a decision on the Board’s proposal in autumn, probably sometime between October and December. Thereafter, Building and Planning to formulate a proposal for how the building regulations to be changed, which also will go out for consultation.
Here you can read the of respondents’ views.
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