Decide on controls first. Three models use knobs: the NA120/00, the NA130 and the HD9200/90. Three use digital displays or panels: the HD9252/90, the NA231/00 and the NA342/00. Knobs are direct. Panels add presets.
A buyer who wants a compact 4.1 litre model can choose between the Philips Air Fryer HD9200/90 4.1L and the Philips Digital Airfryer HD9252/90 4.1L. The first has knobs and dishwasher-safe parts. The second has a touch panel with an LED display and lists 1500 watts.
Two 6.2-litre models give the larger basket. The Philips Air Fryer NA130 6.2 Litre keeps knobs, lists 1700 watts and has a non-stick basket. The Philips Air Fryer NA231/00 6.2L has 13 preset modes and a cooking window, but its page gives no power or timer. Pick the NA130 for plain controls and the NA231/00 for presets.
A buyer who wants more than frying can look at the Philips Air Fryer Oven NA342/00 7.2L. It lists 16 cooking functions, 2000 watts and a cooking window. Philips says its low-temperature settings suit dehydrating and fermenting curd.
The warranty does not separate these models, because every one carries two years from Philips. The NA120/00 is the one to check twice, since its product title and its specification table disagree on capacity. Confirm the current figure on the Philips page before you order.
The starfish pan is worth a look. Philips says the patented starfish pan circulates air so food does not need flipping. The NA130, the NA231/00 and the HD9200/90 pages all mention it. The other models rely on Rapid Air or the oven-style layout.
Then pick a basket. The 4.1-litre and 4.2-litre units are the smallest, the two 6.2-litre units are larger, and the oven-style unit holds 7.2 litres and adds extra functions.
Check the cleaning and cord notes last. Only the HD9200/90 lists dishwasher-safe parts. Two models give a 1.8 m cord, and several others give 0.8 m.
For wider comparisons, read the best air fryer brand, best air fryer and best small air fryer guides. The best air fryer oven guide covers oven-style units.