MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
The fan is completely silent, though it is running at minimum. My room is pretty noisy with other stuff so it might be audible but I don't notice it. I don't know how you size these type of fans, but the outside diameter of the case is about 70mm.