What are double rabbeted jambs and how do they set our Pivot Doors apart?

Pivot doors have some inherent drawbacks due to the hinge system. They have less insulation because more space is needed around the frame for the door to operate smoothly. While most companies do not have a solution for this, we have a double rabbeted jamb system that decreases the airflow on the side of the frame. It allows the door to be closer to the side of the frame, reducing the gap.