This paper describes Energy Auditing techniques used throughout the world. Details of references to Energy Auditing discovered during an extensive literature search conducted by the author are recorded, and the usefulness of various descriptions of the detailed practicalities involved in Energy Auditing is discussed. The practical methods used by some professional auditors to audit multi-storey office buildings in New Zealand are described. Conclusions are reached about both the problems encountered in auditing and the prospect for wider application of energy auditing principles and practice in the future.