Presently, the industrial sector is responsible for 21% of energy consumption in Morocco. Fully, aware about the challenge of reducing energy consumption and related CO2 emissions by industries, Moroccan authorities have legislated under the new law (no 47-09 related to energy efficiency) the obligation of energy audit in Moroccan industries. In such a context, this paper is a Level II energy audit (conforming to ASHRAE classification) performed for an industrial site based in Fez (Morocco) specialized in producing and commercializing cattle feed. A detailed analysis of the characteristics of the energy use has identified a mismanagement of the electrical energy. Through the improvement of the DPF (displacement power factor) to a value of 0.98, it was shown that the factory can save about 52758.74 US$ annually. An improvement of energy efficiency of the interior lighting was also performed. The proposed action concerned the voltage regulation and has the potential of reducing 13.6% of the lighting energy consumption with the mitigation of approximately 27 533 of CO2/year. Furthermore, harmonic treatment by installing passive filters for VSD (variable speed drives) was carried out. The energy savings related to the harmonic treatment were evaluated to be 26 760 kWh/year. (C) 2016 Elsevier Ltd. All rights reserved.