The properties palette needs to have more constraint settings for ducts etc. Why isn't top of duct, and bottom of duct shown under placement?
Show top of duct, and bottom of duct. Be able to lock those so if duct is resized cad holds the T.O.D. and the resizing happens according the the constrained dimension.
There are about a dozen places I would like to see a toggling lock to set constraints. Basically anywhere I have a Dimension.
Add an 'apply' button on the properties palette.
Very annoying to change the Width of a duct, and plan to change the height as well... and to have cad propmpt to change fittings and transitions before the changes have been completed. Telling me custom part must be created etc... adds like 8 keystrokes just to make a straight forward adjustment.
It would be nice if the HVAC Tool Palette didn't take 'a month of sundays' every time you click on adding a endcap, or diffuser or... what is acad doing that I have to wait 35 seconds for it to open the fitting dialog??? Make faster x25!