So I have some 3D models in Inventor 2014 and I am trying to import them into Revit 2014 and then add piping and electrical connections.

I tried saving the inventor model as a .sat file and then using Revit's Import Cad feature, however, the model appears to be a giant box. When I try to select a single face of the model, it just selects the entire model.

Ultimately I am trying to add pipe and electrical connections to the models, however, when I try to select a single face to add the connection, it selects the entire model (as stated before)

I am very new to Revit (a week or so) and so any help would be appreciated!