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 Choptank River Watershed is located on the western edge of Delaware and resides in Kent County. The headwaters of the Chester River lie to the north and Marshyhope Creek is to the south. The Choptank River Watershed consists of Tappahanna Ditch in the northern portion of the watershed, Culbreth Marsh Ditch in the center, and Cow Marsh Creek in the lower portion. Both Tappahanna Ditch and Culbreth Marsh Ditch drain to Mud Millpond, which is situated at the Maryland-Delaware state line. The pond discharges to the Choptank River in Delaware, which meanders southward, where Cow Marsh Creek connects in before continuing into Maryland. The drainage area of the Choptank River Watershed within Delaware is approximately 97 mi2.