I am finishing a basement and wanting to add a vent to one of the rooms. There are a couple of vents leading to the rooms directly above and I want to know how I can split this to get a vent in the basement area.
I am guessing this isn't standard practice but I am willing to make the sacrifice by shutting off the upstairs vent so that I can open the vent below. The vent is normally shut so I don't think I'll miss it.
Here is a pic of what is available, is there a part that could accomplish this? I am putting drywall on the ceiling.