The Ninja Foodi Max Dual Zone AF400UK is a high-capacity air fryer with two 4.75L drawers, designed for family-sized cooking. It features six modes: Air Fry, Max Crisp, Roast, Bake, Reheat, and Dehydrate. Smart Finish lets you cook two foods that finish at the same time, even if they require different durations. Match Cook allows you to duplicate settings across both drawers for big batch meals. The AF400UK builds on the success of the AF300UK, offering even more room and faster cooking power.
Sporting Ninja’s signature matte black finish and silver handles, the AF400UK is a stylish yet substantial countertop appliance. Each drawer is equipped with its own crisper plate and operates independently. The control panel is centrally located, with responsive touch buttons and a crisp LED display. The unit feels solid and well-built, with a heavy-duty design that reflects its larger cooking volume.
This air fryer offers a combined capacity of 9.5L (4.75L per drawer), which is among the largest available in the UK. Perfect for large families or hosting guests, each drawer can handle a tray of chicken wings, a pair of salmon fillets, or a hearty portion of roast potatoes. It measures approximately 42cm wide, 32cm deep, and 33cm tall — so while it does demand worktop space, it earns it by replacing your oven for many meals.
The AF400UK is a performance beast. Whether you're air frying breaded fish, roasting vegetables, or reheating pizza, the results are crispy, even, and fast. Max Crisp mode is especially effective for frozen foods, while Bake mode delivers surprisingly moist cakes and muffins. Dual drawer flexibility means you can prep two separate parts of a meal at once — no flavour crossover and no juggling oven trays. The Smart Finish feature works seamlessly, helping different foods finish together without overcooking.
The AF400UK is a performance beast. Whether you're air frying breaded fish, roasting vegetables, or reheating pizza, the results are crispy, even, and fast. Max Crisp mode is especially effective for frozen foods, while Bake mode delivers surprisingly moist cakes and muffins. Dual drawer flexibility means you can prep two separate parts of a meal at once — no flavour crossover and no juggling oven trays. The Smart Finish feature works seamlessly, helping different foods finish together without overcooking.
Cleaning is straightforward. Both baskets and crisper plates are non-stick and dishwasher-safe. After each use, allow the unit to cool before wiping down the interior walls with a damp cloth. The outside can be wiped with a microfibre cloth to keep it smudge-free. It’s worth checking behind the drawers weekly for grease or residue buildup.
Available through NinjaKitchen.co.uk, Amazon, and retail partners featured in The Sun. The AF400UK typically retails between £199 and £229. Watch for seasonal offers, bundles, and value packs that include extra crisper plates or recipe books.
The AF400UK is a clear upgrade over the AF300UK thanks to larger drawers and slightly faster cooking speeds. Compared to the DoubleStack XL, it takes up more horizontal space but may be easier to access for some users. It doesn’t have the smart thermometer like the premium DoubleStack XL, but the power and capacity more than make up for it for most family needs.
If you’ve got the counter space and cook for a crowd, the Ninja AF400UK is a no-brainer. It’s fast, versatile, and large enough to replace your oven for many meals. The dual drawers and 6 modes offer total flexibility. It might lack some of the premium tech features of newer models, but in terms of performance-per-pound, this one’s hard to beat.
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Yes — each drawer holds up to 4.75L, perfect for prepping meals in bulk.
Yes — drawers are fully independent with no flavour transfer.
Yes — it includes a printed guide with timings and cooking inspiration.
No — the smart thermometer is only available on premium models like the DoubleStack XL.
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