The thresholds used to assess the renovation rely on either the respective metrics set in the applicable building regulation for ‘major renovation’ transposing the EPBD, or, in the case of relative improvement, on Primary Energy Demand (PED) defined as follows: the annual primary energy demand associated with regulated energy use during the operational phase of the building life-cycle (i.e. ‘module B6’ according to EN15978), calculated ex-ante according to the national methodologies for asset design assessment, or as defined in the set of standards ISO 52000, expressed as kWh/m2 per year.
A renovation is eligible when it meets either one of the following thresholds:
a) Major renovation: the renovation is compliant with the requirements set in the applicable building regulations for ‘major renovation’ transposing the Energy Performance of Buildings Directive (EPBD)
b) Relative improvement: the renovation achieves savings in net Primary Energy Demand of at least 30% in comparison to the baseline performance of the building before the renovation.
The baseline performance and predicted improvement shall be based on a specialised building survey and validated by an accredited energy auditor. The methodology used for the measurement of floor area must be declared by referring to the categories established by the International Property Measurement Standard.