This paper will focus on the 2012/27/EU Energy Efficiency Directive (EED). Since the EED is a rather new legal act, its assessment from an environmental law perspective has been neglected in academic literature. Therefore, the next question automatically arises: does the new directive take steps to improve the EU regulations concerning energy efficiency? The EED undoubtedly took a step forward by providing legally binding frameworks for the reduction of energy consumption (instead of the previous political and non-binding energy efficiency goals) and has done this in an absolute way, which is the most important requirement from an ecological point of view. Beyond the special targets of the EED, there are several specific requirements that may play a significant role in the realisation of the EED’s targets. Among these, for instance the following is highlighted in this paper: establishing energy efficiency obligation schemes or adopting alternative policy measures; the 3% commitment of renovation regarding central government buildings; the obligation of energy audits regarding enterprises that are not small or medium-sized, etc. This paper concludes that, despite a few provisions of the directive meeting the ecological requirements, in reality, the regulation misses theoretical ground.