Oct 09, 2019 Media, News and Media

NZEB buildings arrive, which hardly consume light

Cinco Días


Is it possible that a building hardly consumes energy? That is the challenge that drives the Nearly Zero Energy Building (nZEB). An utopia? At all, there are already more than 200 buildings of this type distributed around the world.

The idea is not new: the European Directive 2010/31 / EU already introduced almost a decade ago the definition of almost zero energy consumption building, or nZEB, and encouraged to achieve measures such as the use of renewable energy, among others. It is a mandatory directive in all public and private EU buildings by 2020. In its background, it achieves greater energy efficiency in cities and reduces the emission of greenhouse gases into the atmosphere (buildings are responsible for 40 % of these emissions). It would try to reduce the current energy consumption of a construction by 80%

According to European regulations, public buildings should be the first to adapt (as of December 31, 2018) and then private ones (as of December 31, 2018). However, the EU has given each country freedom to draft its rules. Spain has not yet published the modification of the Technical Building Code, so this issue is still in the air.

NZEB buildings seek to take more advantage of intelligent architectural design and environmental conditions. Therefore, an exhaustive study of the space where they are going to be built are necessary (or have already been built, in case of reform). The next step is to focus on renewable energy sources that allow proper air conditioning and efficient use of sanitary running water, which will allow a reduction in energy consumption in the building. The surrounding climate is essential, not only for light, but also for other meteorological factors such as the proximity to the coast or the wind. Primary energy consumption will be delimited and those works that exceed it will not be on the nZEB building list. Therefore, they will not have it validated in the energy certificate of the property, a mandatory document since 2013.

This regulation will apply to all new constructions as of December 31, 2020. To help in this transition towards zero consumption of energy, the Administration already offers aid through the State Housing Plan that, among others, facilitates the installation of renewable energy sources.