We’ve just had a kitchen fitted & have noticed the fitter left a 15mm+ gap between the top of the plinth & the bottom of the units. It can be seen from the living room. The gap is 22mm on the breakfast island. The unit heights are now 910mm without worktops (coming this week) which will make them above average height & too tall for me at only 5ft. We’ve challenged him & he says the gap is for ventilation & the height is correct. My own research contradicts this, also the Howdens manual he worked from! I really want to get him the lower the units but he’s refusing. Please could any professional fitters out there give me their opinion.