In North America, the Athena Impact Estimator for Buildings is the only free software tool that is designed to evaluate whole buildings and assemblies based on internationally recognized life cycle assessment (LCA) methodology.
Using the Impact Estimator, architects, engineers and others can easily assess and compare the environmental implications of industrial, institutional, commercial and residential designs — both for new buildings and major renovations. Where relevant, the software also distinguishes between owner-occupied and rental facilities.
The Impact Estimator for Buildings is a free program with registration and is accessible from the Athena Sustainable Materials Institute. The installation is a Visual C# (C-Sharp) application that is PC-compatible but can also be run on a Mac system with appropriate Windows capability. Mac users can now log on to the Athena server and run the software remotely, alternatively. Additional documentation, features and knowledge base is available on the website.