Air Frying Technology Vortx Technology. This product is up to 35% narrower than a normal dual basket air fryer. When comparing to a standard single basket air fryer, it will be larger overall. SPACE SAVING DESIGN: Slimline dual stack design provides a much larger cooking capacity than standard dual basket air fryers & other dual stacked air fryers on the market but takes up 35% less countertop space, fitting comfortably underneath cabinets & in kitchen cupboards Compared with a standard Dual Basket Air Fryer .