If the equipment is going to be based off of the same ceiling level, then you should use the same Reference Plane (or Level) to host them both. As I mentioned previously, Ducts must be associated with a Level, not a Reference Plane.
River Itchen. The River Itchen is a beautiful chalk stream which flows for approximately 28 miles from mid-Hampshire to Southampton.he source of the Itchen is situated in Cheriton, near Alresford, and flows down to the historic city of Winchester passing through nature reserve Winnall Moors, and Winchester City Mill.
The Danube River is predominantly contained in Eastern and Central Europe. It begins in Germany in Donaueschingen in the Black Forest Mountains and runs for 1,770 miles or 2,850 kilometers along the European continent before emptying into the Black Sea in Romania. Like the Volga, the Danube played a large role in how Eastern and Central Europe was settled.