It was developed for the Department of Communities and Local Government (DCLG) by the Building Research Establishment (BRE). It provides analysis of the energy consumption of all buildings (other than dwellings), used in support of the National Calculation Methodology (NCM) and the Energy Performance of Buildings Directive (EPBD). SBEM is also used in determining CO2 emission rates for new buildings for compliance with Part L2A of the Building Regulations (England and Wales) and equivalent Regulations in Scotland and N Ireland.
The National Calculation Methodology (NCM), the procedure for demonstrating compliance with Building Regulations for buildings other than dwellings is used to calculate the projected annual energy use for a proposed building and compare it with the energy use of a comparable “notional” building. Both calculations make use of standard sets of data for different activity areas and call on common databases of construction and service elements.
A similar process is used to produce an “asset rating” in accordance with the EPBD. The NCM therefore comprises the underlying method plus the standard data sets. It will produce a rating of 1 (worst) to 100 (zero emissions).
The information required to complete the assessment is similar to that of undertaking a SAP assessment. The calculations need to be performed by a suitably qualified ‘Competent Person’, as certified by BRE or other accredited body.
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