Since the medium temperature applications is the most common one, it is the intention of the legislation that for this application the energy class should be displayed in advertisements and technical promotional material. Also both classes may be indicated if it is clearly indicated which class belongs to which temperature application.
Disclaimer: Please note that the European Commission cannot provide a legally binding interpretation of the EU legislation, as this is the sole competence of the European Court of Justice. Any remarks from the European Commission services are without prejudice to the position the Commission might take should related cases arise in a procedure before the Court of Justice.