Hatches & Toothed motor Air mixing unit with mix-hatches for inside/mix/outside air. Extension for extraction of air. Hatches executed in plywood with coating. Practical situation with mixing hatch. Info hatch position: 79% open. Setup page hatches. Status page hatches. Toothed motor for opening hatches. Detail of pinion and rack. Detail of rack with window clamp. Bearing sheet for ax. All information as PDF file