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Monday, February 22, 2010

Revit Architecture Support - Importing large Revit models into Ecotect Analysis

Published date: 2010-Feb-22

ID: TS14593335

Applies to:
Autodesk® Ecotect® Analysis 2010
Autodesk® Revit® Architecture 2010
Revit® Architecture 2009
Autodesk® Revit® MEP 2010
Revit® MEP 2009


You have a large Revit model that you wish to import into Ecotect Analysis and would like to know how to simplify the .dxf file and the gbXML file.


Using the Visibility / Graphic Overrides menu in Revit you can make invisible / turn off elements that are unnecessary in Ecotect Analysis. This will reduce the complexity and size of your .dxf export and make the model easier to manipulate in Ecotect Analysis.

It is recommended that you simplify your Revit model for all analyses that use .gbxml export.

Keep in mind that Ecotect Analysis is a design tool that is meant to be used in the schematic phase of a project when feedback from the tool will enable the designer to make decisions about orientation, floor plate depth, massing, etc. During this phase, the BIM model is expected to be really simple, almost like a massing model but with some internal partitions that denote zones for air-conditioning or daylighting. By the time the project is in Design Development, the BIM model has a lot of extra information that is not needed for sustainable design analyses and makes analyses unnecessarily complicated. The additional information in the model does not add to the accuracy of the analysis.

Autodesk - Autodesk Revit Architecture Services & Support - Importing large Revit models into Ecotect Analysis


Patrick Villella February 23, 2010 at 12:41 PM  


Thanks for posting this techdoc. It contains some important points that everyone getting started with Ecotect should keep in mind:
1. Ecotect is a tool for analyzing schematic and conceptual level models. The fact that it is fairly easy to export a complex project from Revit into Ecotect seems to give many the impression that this is an acceptable workflow, but it's in your best interests to keep your models as simplified as possible.
2. Ecotect is a wonderful tool for answering questions such as, what's the deepest our floor plate should be to optimize daylight? Which windows on our building need shading protection or higher efficiency glazing, etc. It is not designed as a tool to replace the much more complex and detailed energy tools such as DOE2, EnergyPlus, etc. Having a bunch of additional detail in your model will not give you a better answer, and, in most cases, will just slow down and confuse the process.

Keep things simple! Keep in mind that Ecotect does export to other formats, such as the IDF and INP files for EnergyPlus, DOE2, & eQuest.

Patrick Villella, LEED AP

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