Energy  Assessors measure the energy efficiency of a building. Measurement is based on  the construction of the building’s fabric and the efficiency of the heating,  lighting and ventilation within the building.

An Energy  Performance Certificate indicates the building’s energy performance in a clear  concise format, similar to that found on electrical appliances.

All information  collected is input into National Calculation Method, software for production of  the Energy Performance Certificate and a Recommendation Report.