the dispenser requires an opening that is 1 inch in diameter

The door is attached at the bottom with a concealed 3/16\"-diameter heavy-duty stainless steel multi-staked piano hinge

which automatically dispenses liquid for a preset time that ranges for 1 to 5 seconds

recessed applications in schools

From the Tech Data

ASI 94696AC Automatic Combination Commercial Paper Towel Dispenser/Waste Receptacle, Recessed-Mounted, Stainless Steel Style-Wall to Floor Grab Bar the dispenser requires an openingFeaturing a sleek, modern look, the ASI 94696AC Paper Towel Dispenser and Waste Receptacle allows you to offer paper towels and a place to dispose of them in one convenient unit, which can help reduce messes in your commercial restroom facilities. Designed for recessed mounting, the unit requires a rough opening that measures 14 5 8 inches in length by 39 3 4 inches in height by 10 inches in depth. The paper towel dispenser holds rolls of paper towels