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.
Chichen Itza is a large Maya city in Mexico. It is a UNESCO World Heritage Site, and has been since 1988. It is located on the Yucatan Peninsula, in the heart of what was once the Classic Maya civilization. The area where Chichen Itza was settled is rather devoid of surface water, with no large rivers.