How to miter an open end of ducting

[Jaycee.foli]

I want to show my duct hood mitered, because I am taking sections to create details from whats modeled. Is there a way to miter an open end of ducting in revit? or, how can I create a family for a length of duct that is mitered in order to use a part to represent the duct? If I have to create a family, the length is 2 foot, but, depth and width needs to be dependent on the size of duct its connected to. I have attached the family I began working on and also a picture of an old CAD detail to show what I am talking about.

 

[HVAC-Novice · Accepted solution]

If you want functional airflow, you need an airterminal and not just an "open" duct. Create or edit an existing air terminal to look the way you want. 

[craigjonnson · Accepted solution]

Hi,

You have 2 options for your Revit category, Duct fitting or Air Terminal as explained by HVAC-Novice.

• To change the category > Edit the family > on the Create tab select the "Yellow" folder "Family Category and Parameters"

• Once set, get into your parameters. I dont think theres a right or wrong way to do this but i always use the "DuctSize" type of parameter over standard length dimensions. 

• As this piece is driven by dimensions, its good practice to change your created reference plains to "Not a reference" and leave the centre plains as is. This will remove the blue arrows from your family stopping the family to be stretched if using the align tool.
• Always give your family a "Type" even if the Type name is Standard or Default.
• You need to add a duct connector and set its system classification to "Global" if opting for the "Air Terminal" category for flow calculations or "Fitting" if using as a duct fitting category. If you go for the Air Terminal, you will need to add a Airflow Parameter and map this to the duct connector properties. Similarly with the Duct Height and Depth.

Check out the changes I have added, When i started getting into family content i learned a lot from editing existing content and seeing how others had built things.