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The Passive House reduces the IU1 inhibitor consumption for heating/cooling and CO2 emissions by a factor 10 compared to the usual old building [59]. Compared with the houses built as per current standards, the energy reduction factor is about 2…4.
The Passive House is a very popular standard not only in the residential area but also in the tertiary sector. The standard can be applied to public buildings, commercial and even industrial buildings [75].
The widespread application of the Passive House concept will significantly contribute to the achievement of the objectives set at the European level. The European Union Directive on the Energy Performance of Buildings EPBD2010 [71] proposes the term “Nearly-Zero Energy” for the buildings that use renewable energy sources in a significant proportion.
The “Nearly Zero-Energy Building” represents a real solution in reducing the energy consumption and the CO2 emissions. According to the European Union Energy Performance of Buildings Directive (EPBD), the nearly zero energy building is a building with a very high energy performance and a nearly zero or a very low energy demand, covered by energy generated on site or nearby from renewable sources [68]. This type of building is a reference target for 2018.