The energy audit becomes an important exercise since energy saving offers the maximum potential for cost savings. A good energy audit enables us to better understand how energy is utilized in the sector and identifies potential energy waste areas as well as areas for improvement in every country. The best energy auditor should provide a clear picture of energy consumption and energy opportunities for improvements. The American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) sets the standards for commercial energy audits, which are categorized into three levels. Nowadays Energy audit in important part of Bangladeshi’s industries sectors. So Future Business Support Center (FBSC) is an best energy audit firm which conduct audit through its own government approved (SREDA Registered) energy auditor.