There are a few installation styles that will allow the appliance to be vented correctly. First, advise to cut the plinth on both the right and left side and leave the white grid fully exposed. Second, the installer can remove the white grid, cut a proper size hole into the plinth. Third, remove the white grid and insert a vent grid into the plinth itself, which may better match the kitchen design. The dimensions of the suggested cut out are as shown here:
