Dynamic simulation modelling (DSM)


A virtual model of the building is produced by SBEM or another Part L approved dynamic simulation modelling package. For this, a detailed description of the building’s geometry, construction, services and end use is needed. Standard operating conditions for each building type are defined in the NCM and are applied to the building being assessed.


Tata Steel and Oxford Brookes University have developed a calculation tool that allows very quick assessment of the impact of changing different elements of the building fabric, services and the inclusion of renewable energy systems on the total building CO2


can be used to assess the cost-effectiveness of each change. As well as predicting the CO2


energy cost savings and financial payback.


While the tool is not recognised for Building Regulation compliance, it can be used prior to the more complex SBEM or other approved DSM modelling.


Lifetime CO2 emissions


People often focus on one aspect of a building’s impact. In order to minimise building CO2


emissions, it is important to consider the


combined emissions throughout the life of the building from: Embodied CO2 Operational CO2


CO2 emissions


during maintenance CO2


end of life.


Specifying a more thermally efficient building envelope may increase the embodied CO2


but this is often offset by the reduced operational


emissions. Similarly, more durable products that last longer require less maintenance and reduce the CO2


lifetime emissions.


There is a lot of focus on the recycled content of materials, but consideration must also be given to the environmental impact at the end of the building life. Metal cladding systems are usually completely recovered due to their financial value, and either reused or recycled.


emissions generated benefits/impacts at


emission rate. This emissions, the tool can be used to assess


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