SBEM (Simplified Building Energy Model) is a calculation engine which provides an analysis of the energy consumed by a building. The program calculates CO2 emissions and monthly energy use based on the geometry of the building, fabric used for construction, building activities, HVAC systems and lighting equipment utilised.

The calculation engine takes into account standard data from the NCM (National Calculation Methodology) database in order for it to evaluate the CO2 emissions of a building.

The primary purpose of SBEM and its associated interfaces such as Design Builder is to produce a reliable evaluation of the energy use in non-domestic buildings for the purpose of Energy Performance Certificates (EPCs).

As this method utilises monthly weather data it provides a "broad brush" assessment compared with the more detailed Dynamic Simulation Model (DSM) method.

Parker Wilson Sustain have engineers trained in the use of accredited SBEM software.