Depends on location of the vents, climate, system type - heating, cooling or both and heapump vs furnace for heat if applicable.
2x12 is very small for 6" metal. you do lose a bit of area to the register/grill.
I would go 3x10 or equivalent if you need good throw.
4x10 or 4x12 if you want lower velocity/noise.
2x12 is very small for 6" metal. you do lose a bit of area to the register/grill.
I would go 3x10 or equivalent if you need good throw.
4x10 or 4x12 if you want lower velocity/noise.