There are a few disadvantages of air fryers to be aware of before purchasing one. One downside is that they can be noisy. Another is that they can be expensive, costing anywhere from $100 to $400. Additionally, air fryers can take up a fair amount of counter space and some models require preheating before use. Finally, while air fryers are designed to be safer than deep fryers, there is still a risk of burns associated with their use.