Moved into a new house that was only used as a summer home and had a portion of the basement finished. They tapped into existing duct work from my HVAC system to run into the finished area but bc it's cool in the basement in the summer and they didnt use the house in the winter, it was sealed off for potential future use. I want to open it up and put a register on that can be opened and closed as needed but when I went to try to open it up, the piece that's sealing it up is in there good and I couldn't find a register that seemed to fit either way.
The outer dimensions are 12 1/8" x 9 1/4" and the inner dimensions are 8" x 10".
(P.s. mobile site keeps flipping my images ...)
Any help on how to get this done would be appreciated!