Surface you can use strut, wedge andchors etc. but when a panel is mounted recessed is it attached to studs? How is this framed out if studs are 16" o.c. and the panel width can vary? How is the panel attached when recessed? Thanks
14 1/4" or 14.25" is a common size and should fit between studs.
Don't forget to read 312.
312.3 Position in Wall. In walls of concrete, tile, or other
noncombustible material, cabinets shall be installed so that
the front edge of the cabinet is not set back of the finished
surface more than 6 mm (1?4 in.). In walls constructed of
wood or other combustible material, cabinets shall be flush
with the finished surface or project therefrom.