Installation requirements Install the printer with enough space around it to open trays and bins, install toner, and perform maintenance. If the duplexer is installed, the printer needs 101 mm (4 inches) of ventilation space on the left side (fan side) and rear of the printer. 390 mm (15.4 inches) 1043 mm (41.1 inches) Figure 2. Top view, HP LaserJet 4100/4100N/4100TN/4100DTN printer with trays and rear output bin open (18.7 inches) with top cover open Figure 3. Side view, HP LaserJet 4100/4100N printer 22 Printer description EN 345 mm (13.6 inches) with top cover closed 475 mm