An air fryer is an appliance that cooks food in hot air generated by electric current and circulated inside the fryer. An air fryer works similarly to a convection oven, but without the addition of oil. The circulation distributes the heat more evenly than in an oven, so the food gets brown and crispy on all sides.
What makes the food allergy-friendly is that it is prepared without oil. There is no need for flour and egg breading. It is easy to prepare gluten-free and vegan dishes.
ECARF therefore certifies air fryers as allergy-friendly because they allow food to be prepared without oil.