Automatic Duct Sizing on Part of a Duct System

[smotamedi.230512]

Hi,

I'm working on a project in Revit MEP 2010.
I have three zones (ie: one AHU per floor), and I want to get Revit to automatically size the supply air ducting for one floor, not all three.

Is there a way to choose a specific zone/ahu/system to size?
Does Revit have to size all ducts in the model?

Thanks for your help!

Shiva

[Simon.Whitbread]

Hover over a piece of duct and use the TAB key to cycle through the ducts until you have a selection that you want to size. Or go to a 3D view and select an area - should be simple(ish)