eTool model the benchmark buildings based on a weighted average building density, size and functionality of new stock for the type of building undergoing the LCA.  In essence, the benchmark is a nominal statistical average of buildings that provide the same function.  For example, for residential buildings, we look at the weighted mix of existing housing stock, the size and occupancy.  From there we make adjustments to ensure modern day code compliance.  The benchmarks have to be specific for each region to account for building codes and climate variables  For example, there are major differences between a code compliant building in the US verse Australia.  Our current published benchmarks are all Australian buildings at present but we’re extending the library internationally as we speak.  eTool create and manage all the benchmarks, it’s not a user defined thing and therefore all LCAs conducted in eTool are comparable for a particular building type in a particular region.

Posted in: Technical