A typical audit cost is 5 percent of the annual energy bill (Oppenheim, 2000). The energy audit assesses the efficiency of all building components and systems that affect energy use. The audit process begins at energy meters, where energy sources coming into a building or facility are measured. Energy flows-inputs and outputs are defined later for each fuel.

These flows are measured as different functions or specific uses, then the function and performance of all building components and systems are evaluated. The effectiveness of each of the functions is evaluated, energy and cost saving opportunities are identified. An energy audit report is prepared at the end of the process.

The report should include documents relating to the use and use of inspected buildings, as well as an assessment of the condition of buildings, related systems and equipment. The report should also include recommendations on improvements in operation and maintenance and how to improve energy efficiency with energy-saving technologies.

                                                                                                                                                                                                                         Source: Cantekin Ertekin