Case Green Directive: the content of Annex I
THE’Annex I of the European regulatory document provides the methodological framework for the calculation of the energy performance of the buildings, based on energy consumption measured or calculated.
This evaluation includes all the forms of energy necessary for the functioning of the building, including the heatingThe coolingthe hot water productionthe ventilation and theintegrated lighting.
In the Case Green directive it is specified that Member States are required to ensure that the calculation methods adopted are representative of the real conditions of use buildings and take into account the typical users of users. Where possible, these methodologies must be based on national data, building regulations and measured data available. In addition, the use of theEnergy measured to be used in order to calculate the energy performance as a verification parameter, provided that the distinction between energy carriers and readings at least monthly intervals are made.
The energy performance of the buildings is expressed in kwh/(m².a) and must be reported transparently to allow the certification and verification of compliance with the minimum requirements established by the legislation.
The methodology for determining the energy performance of a building must also be open to innovation.
The fundamental elements of the method of calculating the energy performance of the buildings
The determination of the energy performance of a building according to the Case Green directive is based on a calculation methodology that considers a complex set of parameters, including the actual thermal characteristics of the building. These aspects include the thermal ability of the building envelope, theinsulation of walls, roof and windows, as well as the contribution of the passive heatingobtained through solar gains and the thermal accumulation of materials.
Equally relevant are the cooling elements and attention to the reduction of thermal bridgeswhich can compromise overall energy efficiency.
On the plant engineering front, the performance of theHeating system and production of domestic hot water. Another key parameter is the Renewable energy production and storage capacitywhich contributes to reducing the consumption of primary energy and improving the self -sufficiency of the building. The air conditioning systemsthe systems of Natural and mechanical ventilation and the heat recovery They significantly influence internal comfort and reduction of consumption. For non -residential buildings, the presence of a integrated lighting systemwith intelligent adjustment systems of the light intensity and use of low consumption technologies, represents an additional element of evaluation.
There design of the buildinghis position and orientation Compared to the external climate, they directly affect energy efficiency, as well as the use of Passive solar systems and solar protectionswhich help to reduce summer overheating and improve winter comfort.
The internal climatic conditionsincluding temperature, humidity and air quality, must be carefully managed to guarantee the well -being of the occupants with rational use of energy, also in relation to internal loadsderiving from the presence of people, equipment and artificial lighting.
Finally, i Automation and control systems of buildings They play a strategic role in the optimized management of energy resources, allowing to monitor, regulate and optimize the functioning of the plants in real time.
