How many of you remove the HVAC ceiling return vent that is screwed to the ceiling?
Not being snide but why would you want to?
Not me. But if that is the one housing the main filter, I would at least point it out that it should be replaced with a proper filter door
Is this a condo where you remove the filter grate to view the pancake style air handler?
If you have to unscrew it, it is a grill cover, not a return register.
Why for only the ceiling mounted? What about the wall or floor mounted return grills?
No to each of these.