The Champion and Pro Series ovens are both impressive, but what sets them apart is the design of the oven chamber. Unlike traditional wood-fired ovens, where heat escapes through the stack even with the door closed, the Pro Series ovens have a unique feature where the oven chamber is essentially sealed with the door on, preventing heat loss through the stack. This results in best-in-class heat retention, making it possible to cook a wide variety of dishes in a Cru Pro oven with maximum versatility.