Traditional gas grills cook with 100% hot air. Just think about that- hot air is what we use to dry our clothes! Other infrared grills that use TEC’s old ceramic burners cook with predominately hot air, too, (65% hot air, 35% IR heat). But TEC’s new, grilling system virtually eliminates the hot air in grilling, so food retains up to 35% more of its own natural juices. Chicken breasts, pork, even well-done meats remain tender and juicy.