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 River Itchen is located in the county of Hampshire around 70 miles south west from central London and is easily reachable from London by fast road and train.As with most chalkstream rivers the Itchen is noted for the high alkalinity and extreme clarity of its water.ituated very close to the River Itchen are some of the United Kingdomâs most important historic sites such as Stonehenge, Winchester, Salisbury (inc. Old Sarum), Portsmouth (inc. HMS Victory), Southampton and the New Forest.