ASHRAE Viewer for Revit MEP
Revit MEP utilizes the American Society of Heating Refrigeration and Air Conditioning Engineers (ASHRAE) Duct Fitting Database to lookup coefficients for determining pressure losses through duct fittings. This add-in provides a way to view the illustrations and the data table of available duct fittings from the database.
Room/DoorRenumbering for Revit
This plugin can be used to renumber or re-assign the "Number" properties of rooms and spaces or the "Mark" property of doors and windows in the order that the user selects while avoiding duplicated assignments. The command allows the user to specify the starting number with the option of the prefix and suffix added.
Available for free download from Autodesk Labs ADN Plugin of the Month Catalog site.