Type 1 (Level 1) Energy Audit
An overview of energy use and comparison with accepted benchmarks, usually requires at least one site visit.
Type 2 (Level 2) Energy Audit
A more detailed on site investigation required producing assessment of costs and savings identified through some measurement and energy monitoring.
Type 3 (Level 3) Energy Audit
A more focussed and detailed on site investigation required producing accurate assessment of costs and savings identified through extensive measuring and energy monitoring. It can be site or process specific and may involve energy simulation modelling.