An energy audit is only as good as the data behind it. The more of the items below you can hand to the auditor at the start, the less time is spent chasing records and the more of the audit goes into measurement and analysis. You do not need everything. Whatever is missing, the auditor can measure on site.
1. Utility bills and tariffs
- Electricity bills for the last 12 to 24 months, showing consumption, maximum demand and power factor
- Natural gas bills and any fuel purchase records (diesel, furnace oil, LPG, biomass, coal)
- Water bills, if water is part of the scope
- Your tariff category and any contract or sanctioned load details
2. Production data
- Monthly output by product or line, for the same period as the bills
- Operating hours and shift pattern, including holidays and shutdowns
- Any seasonal swings in production
With output and energy side by side, the auditor can calculate how much energy each unit of product uses and see how it changes over time.
3. Drawings and equipment lists
- Single-line electrical diagram and a site layout
- List of transformers, generators, boilers, chillers, air compressors and large motors, with nameplate ratings
- A load list for the main process machines
- Locations of existing energy meters and sub-meters
4. Records from the utility systems
- Boilers: fuel use, steam output, operating pressure and any combustion or efficiency tests
- Compressed air: compressor capacity, pressure settings and run hours
- Generators: run hours and gas or fuel consumption
- Chillers and air conditioning: operating logs and set points
5. Maintenance history and past studies
- Earlier energy audits or efficiency studies, and which recommendations were carried out
- Maintenance schedules and known problems, such as leaks, failures or overloaded circuits
- Planned expansions, new machines or projects already underway, such as rooftop solar
6. People and access
- One named contact who can answer questions and arrange access
- Safe access to electrical panels, boiler rooms, compressor rooms and roof areas
- Permission to connect loggers to the main feeders and major loads
- Any site safety induction or permit requirements for visitors
What happens on the day
The auditor walks the plant, checks the data against what is actually running, and agrees where to place loggers. The instruments then record over a full production cycle, so the results reflect how the plant really operates. Measurement is done on live equipment, so production does not stop.
What if you do not have all of this?
Most plants are missing something, and that is normal. Tell the auditor what is not available at the scoping visit. Where records do not exist, the audit measures instead of assuming, which is slower but still produces a reliable baseline.
Next steps
Once you have gathered what you can, contact us to arrange a one-day scoping visit and a fixed fee. To see what you will receive at the end, read what an energy audit report contains. For the price side, see energy audit cost in Bangladesh. Our energy audit service page describes the full scope.