Exclude Relite Elements in a script to renumber Doors using Room Numbers

I’m not very familiar with Dynamo, but after following a tutorial, I have a working dynamo script to renumber the doors in my model based off the number of the room they are associated with. However, there are a small number of relites that are also being renamed because they are under the Door category in Revit. How can I sort out the relite family and leave only the doors to be renumbered? See image of script below:

After “All elements of Category”, you have the opportunity to filter out unwanted relites using the “List Filter By BoolMask”. Certain parameter’s value or the element’s name might be a good key for the mask.