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eTool LCA Expressions

eTool LCA V2 introduced some pretty neat functionality that allows users to enter “expressions” into some fields in a similar way formulas are used in a spreadsheet. This is particularly useful for building operational energy templates, for example, based on building size or occupancy. We have used a third party calculation library to enable this functionality, the list of available operators and functions is available here.

This functionality has dramatically improved the ease at which we can predict operational energy in designs and we’re enjoying using it here at eTool. We will be adding more stored variables as time passes, watch this space. To learn how to utilise this functionality, please get in touch for some training.

We also have a number of variables that relate to the design and can be used in expressions. The list of these is provided below. The default values that are used in library template calculations before loading into a design, or when a variable is left blank. The full list of variables is here:

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