Decree for energy efficiency requirements in buildings (2015)

Last updated: 24 July 2019
The Ministerial Decree 26 June 2015 completes the transposition of the European Directive EPBD 2002/91/CE, and modifies the Decree 192/2005. This legislative measure comprises three different decrees. The first one ( "Application of calculation methodologies for energy performance and definition of buildings minimum requirements €) also defines the requirements of nearly zero energy buildings and set the new minimum EP and single component requirements, to enter into force starting from October 2015. A new calculation methodology for the energy performance is introduced, based on the comparison with a reference building having the characteristics set in the decree. All energy use needed to comply with the standard use of the building is included in computation of the energy performance of the building, which is referred to different classes.
In the second decree ( "Reference scheme for the technical project reports to apply buildings minimum requirements €), the format for technical project reports is defined, relative to new and nearly zero energy buildings, relevant retrofitting and technical installations.
The last decree ( "Upgrade of national guidelines for energy certification of buildings €) includes the national guidelines for Energy Performance Certificates (EPC), to be in force starting from October 2015. A unique information system harmonising Energy Performance Certification in the different regions was also set for all Italian regions, aimed at the management of a national registry of EPC and thermal installations, to be created by ENEA and the Regions by the end of 2015. Regions are now adopting the new guidelines in force from 1 ° October 2015 and those who already implemented EPBD2 have a 2 years 'period to adapt to the new national methodology.
The past rating system with 8 classes: A+ / A / B / C / D / E / F / G established on the basis of a fixed range of EP index (kWh/mq), is replaced by a new rating system based on 10 adaptable classes (A4 / A3 / A2 / A1 / B / C / D / E / F / G), based on a range proportional to the EP of a virtual reference building (identical to the real one as for geometry, orientation, location in the climatic zone, use, etc) but with predetermined thermal characteristics and energy parameters. This methodology allows calculating the boundary between Energy Performance EPgl,nr index (referred to non renewable primary energy of classes A1 e B). The rating captions of other classes are given by multiplier-reducer coefficients of EPgl,nr,Lst.
EPgl,nr considers all energy services in the building (Heating and cooling, DHW - and lighting and mobility for non-residential). When technical systems are not present in the building, the rating is found simulating the presence of heating and DHW equipments.
Each region should perform yearly a control of minimum of 2% EPCs of the total.

Applicable Building Type(s)

Existing non-residential, Existing residential, New non-residential, New residential

Policy Requirement Level



Development Authority: Ministry of Economic Development
Implementation Authority: Agenzia Nazionale per l'Efficienza Energetica (ENEA), Regional Authorities
Verification Authority: At regional level
Enforcement Authority: In Italy the penalty system is defined nationally, but the implementation process is regional

Prescriptive Compliance path

According to the new computation method for the energy performance of buildings, energy demand is derived for a reference building, namely a building identical to the analysed one, but with the thermal and energy characteristics defined in the Decree. The analysed building, after energy renovation, should have a total energy demand lower than the reference building. The parameters for the existing building (interested by energy requalification) are provided in order to be used for the calculation of total energy demand.

Energy Requirements:



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