The energy performance certificate is a public document, with data on the energy performance of the building with recommendations to increase energy efficiency. An essential part of the energy passes not only data on the consumption of energy, but the proposed measures for increase of energy efficiency, which are part of the energy performance certificate. Property owners can see the energy efficiency of their buildings and get familiar with the measures how to improve the efficiency of the input energy and consequently reduce costs.

There are two types of energy performance certificates:

• The calculated energy performance certificate may be issued for each building, while it is mandatory for residential and new buildings. It is calculated at a constant internal temperature of 20 degrees Celsius. Energy indicators that are used in this card are the annual heat required to heat the building per unit of usable area of ​​the building, the annual energy input to the operation of the building per unit of usable area of ​​the building, and the annual CO₂ emissions from the operation of the building per unit of usable area of ​​the building.
• The measured energy performance certificate is reserved for existing non-residential buildings, as the sale of such property does not substantially alter the way a building is used. Its manufacture requires less work. Energy indicators measured are the annual energy input, intended for conversion into heat per unit of usable area, the annual electricity consumption due to the operation of the building per unit of usable area , and the annual CO₂ emissions from the operation of buildings per unit of usable floor area.