The energy audit shall be based on updated operational data on energy consumption and load characteristics. This data should cover at least a full year period of the last two years, be quantitative in nature with tolerable levels of measurement error, be derived from continuous measurements (rather than indicative calculations) with easy searchability and reflect the change in consumption and load over time.
The energy audit should also include a detailed overview of the energy consumption characteristics of a building, industrial activity or installation with a detailed description of the equipment, the mode of operation and the individual uses.
The energy audit should result in a list of proposed savings measures which should be evaluated based on a life cycle cost analysis (LCCA) rather than a simple payback period.
In the case of companies with a portfolio of buildings, energy audits should be proportionate and representative to give a reliable picture of the whole building portfolio
The scope of the energy audit shall cover at least 90 % of the total energy consumption of all facilities used by the obligated undertaking (owned or rented) as well as facilities leased to the public and wider public sector and to nonobligated undertakings, provided that the responsibility for the maintenance and operation of the building remains with the obligated undertaking.
In the case of a portfolio of buildings which can be grouped into one or more groups of similar installations with respect to size, type of processes, geographical location and general elements affecting energy consumption, the energy audit shall be carried out on a representative sample for each group equal to the square root of the installations in the group rounded up to the highest integer.
Undertakings which are not SMEs and which have an energy management system certified by an independent body in accordance with the international standard ISO 50001 shall be exempted from the requirements of paragraph 1. 10 of Law 4843/2021, provided that this management system includes an energy audit based on the minimum criteria set out in Annex VI of Law 4342/2015.