Hello Rusty, The overall outside-to-outside dimensions of this specific model and size are 11-3/4" x 7-3/4".
Hello Guydo, On this specific model/size the mounting holes are 8-3/4" center-to-center.
Hello Shawn, On the specific model/size, the center-to-center on the mounting holes is 12-13/16" ± 1/16".
Hello k1o5, Typically the term "net free area" is associated with gravity ventilation systems used on items like a water heater that has an open flame. This supply register is designed for forced air systems and is test accordingly. In a forced air system, net free area is not measured.
Not completely as when it is closed some air will still come through the fins. It will help you air problem some.
10x4 is the opening size. If your opening is 12x6 then that’s the size you need.
Hello Rey, This specific model/size has an overall outside dimensions of 13-3/4" x 5-3/4" and the neck (the portion that protrudes into the vent/duct opening) is 11-1/2" x 3-1/2".
Hello erins, On this specific size, the center-to-center distance of the mounting holes is 14-3/4".
My old register measured 9.5in x 5.5in. I purchased 10x6 and it fit perfectly. The packaging tells you what size opening it will fit
Since the 10 x 6 fits into your vent, the dept is the size of the metal cover.