An Energy Audit is a series of actions, carried out by highly skilled specialists, in public, commercial or industrial (C&I) facility, to quantify the energy use in the facility and to identify ways by which energy optimization can be achieved. Energy optimization will result in energy efficiency (EE) improvements and reduced energy consumption. The managers of the facilities are confronted with the additional expenses needed for the development of an EE project development while they target to reduce their energy costs! This document will present why such additional expenses are profitable for the end-users.