Anyone who has Revit MEP 2008 will discover that they have IES integrated into the product to allow you to create heating and cooling loads directly from your model. You will also find a link in the heating and cooling loads dialogue box which allows you to convert your BIM model into IES virtual environment. More details and AVI's can be found out at
http://www.iesve.com/content/default.asp?page=s98
http://www.iesve.com/content/default.asp?page=s12
This PDF link will provide you details on what is included within the Sustainability toolkit.
http://www.iesve.com/content/mediaassets/pdf/Sustainability%20Toolkit%20Features.PDF
