Fra?n passivhus till NNE-hus
va?gen till ha?llbar utveckling
sustainable development by reducing the energy use by EU:s directive of energy efficiency and the UN Convention. The second purpose is to present the technical solutions regarding ventilation and heating system that is being used in passive houses. This was done using 8 passive houses, 4 germany and 4 swedish passive houses. Even the international and Swedish system requirements for passive houses have been addressed in this project. The goal was also to explain how and why the mechanical system in passive houses has developed to the technology used today. Because the building and property section stands for 40% of the total energy consumption within the union, EU demands that member countries has to be more energy efficient to reduce energy consumption and therefore reduce greenhouse gases in the atmosphere. For this to be possible, all new buildings after 31 of december 2020 have to be nearly zero- energy buildings, which becomes a national law in all EU member countries, according to the EU directive of energy performance of buildings. Ventilation system with heat recovery in passive houses has developed when it comes to heat exchangers and the electric motors in the ventilation unit. Within the heating system, a development has led to compact units where ventilation, heating and domestic hot water is integrated in the ventilation system. As technical systems combines with solar collectors, the heating system will become more efficient.