Online energy audits are a disruptive and innovative approach that has many advantages compared to the traditional audits. However, assessing a particular consumer about what it needs to be done in order to be more efficient is a problematic that is difficult to generalise. Companies that deal with those new kind of energy audits struggle to solve this particular point. In this work, a deep analysis of the online energy audit world is exposed. Moreover the problem of how to assess and advise a particular consumer by means of an online energy audit is tackled. To do that, this work focuses on the consumption habits for some profiles of the tertiary sector in order to obtain a list of general recommendations to increase efficiency. The idea is that each and every recommendation could be deduced only from the consumption analysis point of view. In other words, with no need for the energy manager to actually visit the building or install any additional hardware.