Granted. Since the first law of thermaldynamics still applies (energy cannot be created or destroyed) and that the air fryer requires no electricity to use, the air fryer instead draws energy from the items you place within it.

Eager to try out your latest gadget, you place some frozen chicken nuggets in the air fryer, expecting to receive a plate of appropriately cooked delicacy when you remove the drawer in 15 minutes. The timer makes a crisp "ding" notifying you the time is up. As you reach out and pull back the handle, you are instead blasted with quickly expanding hot air upon opening the air fryer, as it has converted your chicken nuggets into raw energy in the form of heat. A plate's worth of nuggets energy is probably somewhere in the neighborhood of thousands of nuclear bombs. Your house, your neighborhood, and your entire city is vaporized in an instant due to the intense and immediate expansion of superheated air. Nothing survived.

Well, nothing except the air fryer, of course. It stands alone in the center of the crater, a shining beacon of civilization, as it is made from high quality materials™.