I have been working on Revit mechanical for a while and noticed that I will have grilles that are 1" in width but the annotation label only goes down to 2" How can I change the label to be able to display a smaller size? I'm using the size parameter to pull the information from the grille.
From the image below you can see the discrepancies between the actual opening, the slot size in the properties, and the annotation. Looking at the actual slot size and the annotation size is closer than the properties, so this shouldn't be too big of a deal, right?
Typically architects don't care as much for the face size as much as they care about the size of the opening. Mostly because they like to use the frame that conceals the face and only shows the slot opening. I did some research and this is what I found. According to their literature, a 1" slot is supposed to be the W plus 1-1/4" SDS100 which is the 1" slot is 2-1/2" plus 1-1/4" making it 3-3/4" width. In the example, I did the 1" slot using their SDS100 product. We typically call in our schedules using their description recommendation that goes as follows: Unit length, Outlet type/model, number of slots, border style, and accessories. For example, a 1" ceiling slot will be SD100/1/8/B12. we don't call the unit length as they will vary and change often depending on the application and with all different sizes, we would have to create individual grilles to our schedules making them very massive. I'm not sure if any of this makes sense
Yes. I use the size parameter for the grilles size annotation. Normally is not an issue with regular grilles, but on the slots it has. I will definitely try to adjust the measurement units if I can find the right one. I only found the one for duct size. I wonder if that affects the annotation label.
I strongly suggest that you upload your family (you can attach it below your reply).
Then clarify which part of the grille you want to label in your tag- is it W or S or a different dimension?
Someone will then help you to figure out which parameter to have in your tag label and if you need a customised parameter then we can lead you through how to do that (going forward in Revit that is a skill you will definitely want to have).
Regarding the dimension resolution, in your present case it probably is the Duct Size units that you want to change to show fractional inches,
however once we have sorted out your parameter problem it will probably just be the Length units that you need - depends on the parameter types e.g. from the default Autodesk slot diffuser with plenum family the parameter types are as below:-
Upload your family please.
Okay, with this diffuser there is only one slot. The face width changes with the size of the single slot.
Your problem is that your tag is reading the duct width which has a minimum 2".
Open the family.
Add a new Shared parameter.
Use a formula to make that parameter's value equal to the existing Slot parameter:
Save and load the family into your project.
Then create or amend an air terminal tag family.
Add the same shared parameter to that family and include it in the label.
Load the tag family into your project.
Result:
This is just an example, adjust/amend to suit your own needs.
PS(1): the slot width is not actually what will be seen on the ceiling - you'll see the face of the diffuser which is 3.25" so I hope the Architect is aware of that.
PS(2): I hope your Architect and builder understand that the slot width is NOT the size of the ceiling opening which is required - could be embarrassing when they try to squeeze a 2.5" grille neck into the 1" opening that they've prepared. I wouldn't like to be at that meeting!
