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Learn more about AKSON-vent HVAC Software
Vertical run | Reference objects
Reference objects are objects that are used to specify top and bottom (or
top, transition and bottom) elevations for a vertical run
Any object that has desired elevation can be used as a reference object
Linking to reference objects more info here
If there is no object with the desired elevation in the drawing, create a helper
object and set its elevation
Helper object is a virtual reference object that are used to specify elevation for
vertical runs
How to create a helper object - more info here