Built specifically for architects and using gbXML for data exchange across the Internet, the Web service was one of the first engineering analysis tools to deliver interoperability between building designs and sophisticated energy analysis software programs such as DOE-2.
The Autodesk Green Building Studio Web service enables whole building energy, water, and carbon emission analyses of a Revit building design that can be performed by architects, from within their own design environment, directly over the Internet.

Click here to go to the Cadalyst website to see the full tutorial.

You have to be a registered user to access the web service directly from within Revit. There is a 30 day free trial period for testing. Note that the number of trial projects is limited to 2.

Users view the analyses reports in their Web browser, including the estimated energy and carbon emission summaries and a detailed LEED water efficiency guide.