Ninja AF400UK Review: 9.5L Dual Zone Guide

Short answer: the Ninja Foodi MAX Dual Zone AF400UK is a 9.5-litre UK air fryer with two independent 4.75-litre drawers, six cooking programs and SYNC/MATCH controls. It is a strong fit when a household regularly needs a main and side—or two batches of the same food—ready together. It is a weaker fit if you need one wide, undivided cooking chamber or only cook small single portions.

Editorial disclosure: this is a specification-led review, not a hands-on test. We checked SharkNinja’s current AF400UK product page, exact instruction booklet and UK replacement-part listings on 22 October 2026. We have not measured browning, noise, energy use or usable drawer area.

Confirm the model: AF400UK

“Ninja Foodi MAX” appears on multi-cookers, grills and several air fryers. This guide is specifically about the black AF400UK: a 2,470 W, 220–240 V UK Dual Zone air fryer with two removable drawers. It is not the white AF400UKWH, the smaller 7.6-litre AF300UK, a Smart Cook AF451UK, or an OP-series pressure multi-cooker.

Check the rating label before ordering spares. Drawer and crisper-plate compatibility follows the full model code, not the general “Foodi MAX” name.

Ninja AF400UK specifications

Specification	AF400UK detail
Total capacity	9.5 L across two equal drawers
Per drawer	About 4.75 L; the two drawers do not combine into one cavity
Power	2,470 W
Electrical rating	220–240 V, 50–60 Hz in the instruction booklet
Cooking programs	Max Crisp, Air Fry, Roast, Bake, Reheat and Dehydrate
Temperature span	40°C on Dehydrate to a fixed 240°C on Max Crisp; Air Fry, Roast, Bake and Reheat top out at 210°C
Coordination	SYNC for different settings finishing together; MATCH to copy Zone 1 settings to Zone 2
Included cooking parts	Two non-stick drawers and two non-stick crisper plates
Cleaning	Drawers and crisper plates are dishwasher-safe; the powered base is not
Weight	11.5 kg on SharkNinja’s current UK listing
Current UK guarantee	Two years upon registration, subject to SharkNinja’s terms

What 9.5 litres means in practice

The headline capacity is split permanently between two 4.75-litre zones. That is useful for food that benefits from separation: chicken in one drawer and vegetables in the other, a mild portion beside a spicier one, or two loads of chips with the same settings.

It is not the same as a single 9.5-litre basket. A long fish fillet, wide baking dish or unusually large joint must fit one drawer. SharkNinja says each drawer can hold up to 1.4 kg of fries or a 2 kg chicken. Treat those as maximum-fit examples rather than guarantees of even browning. Air must still reach exposed surfaces, and dense loads may need shaking, turning or smaller batches.

For household sizing, compare your usual food—not just headcount—with the drawer shape. Our air-fryer capacity guide explains why total litres do not reveal usable floor area.

SYNC, MATCH and single-zone cooking

Use SYNC for different foods

Program each zone with its own function, temperature and time, then select SYNC. The zone with the longer program starts first; the shorter zone displays HOLD until both have the same time remaining. HOLD is expected in this mode. It does not mean the second drawer has failed to start.

SYNC coordinates the timers, but it cannot predict whether two pieces of food are actually done. Thickness, starting temperature and load size still matter. Check food safety independently and extend or stop a zone when required.

Use MATCH for the same settings

Set Zone 1, select MATCH and the appliance copies that function, temperature and time to Zone 2. This is the simplest way to divide a larger batch across both drawers instead of overcrowding one.

Use one drawer for a small meal

The AF400UK can run a single zone. There is no need to heat both drawers for one portion. Select the zone you intend to use, set the program and start it. This flexibility matters because a large dual-drawer machine is not only for full-capacity meals.

The six programs: what changes?

Program	Documented range or behaviour	Practical use
Max Crisp	Fixed at 240°C; time up to 30 minutes	Small amounts of frozen breaded or battered food that benefit from high heat
Air Fry	Adjustable, with a 200°C default	Fresh or frozen foods that need circulating heat and surface browning
Roast	Adjustable up to 210°C	Meat and vegetables sized for one drawer
Bake	Adjustable up to 210°C	Small cakes or bakes in suitable heat-safe cookware that fits with airflow clearance
Reheat	Adjustable up to 210°C	Leftovers that should regain a dry or crisp surface
Dehydrate	Low-temperature operation down to 40°C	Fruit, vegetables or jerky prepared with an appropriate food-safety method

Six labels do not establish superior results against another model. The controls define what the appliance can be set to; they do not prove crispness, speed or efficiency for every recipe.

Max Crisp is not just “hotter Air Fry”

Max Crisp is locked at 240°C. Ninja positions it for smaller quantities of frozen food, and the manual recommends checking and tossing frequently. It is not the right default for every food: coatings, high-fat ingredients and lightweight crumbs can scorch or move in the strong airflow.

Air Fry is the more flexible everyday program because its temperature can be adjusted. Start with the food manufacturer’s instructions or a model-specific recipe, inspect early and record what worked. Avoid treating a generic online time chart as a safety guarantee.

Drawer behaviour that surprises new owners

Removing a drawer pauses cooking. Reinsert it to resume.
In SYNC or MATCH, opening one drawer pauses the other too. This protects the coordinated finish.
A long drawer removal can cancel SYNC. The exact manual says removal for longer than two minutes may require both zones to be programmed again.
The crisper plate is removable. It raises food so air can move underneath; whether a particular bake needs it depends on the recipe and cookware.
Do not place a hot drawer on top of the appliance. Use a heat-resistant surface and keep the rear outlet clear.

Counter space, power and ventilation

At 11.5 kg and with two pull-out drawers, the AF400UK is better treated as a substantial counter appliance than a compact fryer. Measure space for the body, open drawers and safe airflow rather than relying on litres alone. Keep the air intake and hot-air outlet unobstructed and follow the clearance guidance in the manual.

The 2,470 W rating is also worth checking against your kitchen setup. Use the appliance directly from a suitable wall socket and avoid assuming that an extension lead or multi-plug is appropriate. Our air-fryer wattage guide covers the practical electrical checks.

Cleaning and coating care

According to the AF400UK instructions, the drawers and crisper plates are the only dishwasher-safe parts. SharkNinja still recommends hand washing the drawers to help extend their life. Let parts cool, soak stuck food and use a soft sponge or brush. Metal utensils and abrasive pads can damage the non-stick coating.

Never immerse or dishwash the powered base. Wipe it with a damp cloth after it has cooled and been unplugged. Inspect the drawer coating regularly; deep scratches, flaking or exposed metal are reasons to stop and check replacement options. See our guide to air-fryer non-stick coatings for care and replacement signs.

Replacement drawers and crisper plates

SharkNinja’s UK parts listings checked on 22 October 2026 identify the following black AF400UK parts:

Confirm the compatibility statement on the live listing before ordering. The white AF400UKWH uses different drawer references, and AF300 or AF451 parts should not be assumed interchangeable because they look similar.

AF400UK vs AF300UK

Both models use two independent zones, six familiar programs and SYNC/MATCH controls. The main difference is capacity: AF300UK has 7.6 litres total, while AF400UK has 9.5 litres—about 25% more. The larger model is worthwhile when its 4.75-litre drawers prevent a repeat batch. If two 3.8-litre AF300 drawers already hold your normal main and side, the AF400 mainly adds weight and counter demand.

See the full Ninja AF300 vs AF400 comparison for model-fit guidance and exact replacement-part references.

Who should buy the AF400UK?

Good fit: households that regularly cook a main and side at different settings.
Good fit: meal preppers and larger households that will use both 4.75-litre drawers.
Possible fit: smaller households that value two-zone separation and have permanent counter space.
Less suitable: buyers who need one wide chamber for large bakeware or long food.
Less suitable: kitchens where an 11.5 kg appliance must be moved after every use.
Check carefully: anyone outside the UK; plug, voltage, warranty and parts support vary by market.

Buying checklist

Confirm the rating label says AF400UK, not only “Foodi MAX”.
Measure counter width, depth, overhead clearance and room to pull both drawers out.
Check that both drawers and both crisper plates are included and undamaged.
For a used unit, inspect coating, handles, rails, cord, plug, vents and control panel.
Decide whether two fixed drawers suit your food better than one flexible or undivided basket.
Price missing parts before buying; stock and price can change.

Frequently asked questions

Is the Ninja AF400UK really 10 litres?

No. SharkNinja specifies 9.5 litres total. Older or rounded descriptions may call it 10 litres, but that is not the exact manufacturer figure.

What is the maximum temperature?

Max Crisp is fixed at 240°C. The manual says Air Fry, Roast, Bake and Reheat go up to 210°C, while Dehydrate reaches down to 40°C.

Can I cook in only one drawer?

Yes. Select and program a single zone. Both drawers are not required for every session.

Why does one zone say HOLD?

In SYNC mode, HOLD means the shorter program is waiting until both zones have the same time remaining. The waiting zone then starts automatically.

Are the drawers dishwasher-safe?

Yes, the manual identifies the drawers and crisper plates as dishwasher-safe, though it recommends hand washing the drawers to help extend their life. The main unit must never go in a dishwasher.

Can both drawers become one large basket?

No. They remain two separate 4.75-litre zones. If you need a single wide chamber, compare a flexible-divider or large single-basket model.

Verdict

The AF400UK’s value is not simply “large capacity.” It is the combination of two genuinely useful drawer sizes with controls that coordinate different foods. For a household that repeatedly cooks a main and side, SYNC can remove awkward timer maths; MATCH can spread a batch across more surface area.

The trade-offs are equally concrete: 9.5 litres is split, the 11.5 kg appliance needs real counter space, and two drawers mean two sets of parts to clean. Choose it when the two-zone layout solves a recurring meal problem—not because a large litre number automatically makes it the better fryer.

Official sources

Choose by your kitchen and meals

Ninja Air Fryers: Model Reviews and Buying Guide · Ninja Air Fryers by Household: Portions, Meals and Timing · Ninja Air Fryer Size Guide: Baskets, Pots and Counter Space · Ninja Air Fryer Types: Drawers, Glass, Grills and Multicookers · Ninja Buying Priorities: Cleaning, Controls, Materials and Value.

For the closest buying trade-off, read AF300UK versus AF400UK.

About the Author

Clara Bennett

I write practical, model-specific air fryer reviews and comparisons. I focus on usable capacity, household fit, cleaning, materials, day-to-day ownership and value so you can choose the right appliance with fewer surprises.

Read my full profile and review method