In our CT models, you can have some rows setting and some rows hatching at the same time. We provide an example of this in our CT Manual on pages 16-18.
In our HB and T-Series models, you can only set and hatch at the same time in our Combined units. These include both hatching baskets and setting trays. While you can hatch in a Setter model, you cannot set and hatch at the same time due to the egg racks turning simultaneously within a frame. Lastly, you can only hatch in our Hatcher units. There is not turning mechanism so you cannot set.