An energy certificate of a building or a particular part thereof shall be issued for buildings or their particular parts in which it is necessary to use energy to maintain the indoor design temperature in accordance with their purpose.
It is not required to be obtained for buildings with a planned time of use of two years or less, buildings used for religious purposes, buildings having a useful floor area of less than 50 m² and industrial buildings, workshops and non-residential agricultural buildings with low energy demand.
An energy certificates has a validity of ten years from the date of its issue.