It depends on what I'm dehydrating. If I'm making candied fruit with maple syrup then rotating helps a lot but for most things the speed of the airflow and the solid front door with the slots on the sides for the exit keeps the air/heat pretty evenly bouncing around. It's definitely not as precise as an Excalibur or something but I'm sure it's possible if desired. For now, this is a proof of concept that has been working well for many months with all sorts of different products.