Ninja AF300 vs AF400: both are two-drawer Dual Zone air fryers with the same core cooking idea. Choose the AF300 (7.6 L) for a smaller household and footprint; choose the AF400 (9.5 L) when two 4.75 L drawers will prevent extra batches. The AF400 offers about 25% more total capacity.
AF300 vs AF400 specifications
| Feature | Ninja AF300 family | Ninja AF400 family |
|---|---|---|
| Total capacity | 7.6 L | 9.5 L |
| Per drawer | About 3.8 L × 2 | About 4.75 L × 2 |
| Cooking zones | Two independent zones | Two independent zones |
| Core programs | Air Fry, Max Crisp, Roast, Bake, Reheat, Dehydrate on common AF300 versions | Air Fry, Max Crisp, Roast, Bake, Reheat, Dehydrate |
| Coordination | Sync and Match | Sync and Match |
| Best fit | Two to four people; moderate portions | Four or more people; meal prep and guests |
| Main trade-off | Large items may be tight | More width, weight and counter demand |
Regional suffixes such as AF300UK, AF300EU and AF400UK can change plug, voltage, included literature and minor details. Use the full model code when checking a manual or replacement drawer.
AF400UK or AF400EUWH: use the suffix, not the colour alone
The AF400 family shares the 9.5 L two-drawer layout, but the suffix still identifies the regional model. SharkNinja lists the black AF400UK for the UK at 2,470 W, while AF400EUWH is the white European model code. A similar capacity or cabinet colour does not confirm the plug, warranty or replacement-part compatibility.
- Buying or owning the UK model? Read the Ninja AF400UK exact-model guide.
- Checking the white European version? Use the Ninja AF400EUWH exact-model guide and confirm AF400EUWH on the rating label.
- Still choosing a basket layout? Compare side-by-side drawers with flexible-divider and stacked designs in the dual-zone air-fryer layout guide.
The family comparison below helps with capacity and workflow. The exact-model guides are the safer place for regional electrical, cleaning, included-part and used-buying checks.
The real difference is drawer size
The AF400 is not a different cooking concept. It scales each drawer from roughly 3.8 L to 4.75 L, increasing total capacity from 7.6 L to 9.5 L. That extra space is valuable when chicken pieces need breathing room, fries would otherwise pile up, or each zone must hold a substantial main.
If you mainly cook one fillet and vegetables, larger drawers do not improve dinner automatically. Extra nominal capacity is useful only if your usual food needs the space. Buy the volume that removes a real batch; litres alone do not establish a speed or electricity-cost advantage.
Ninja AF300: who should choose it?
- Two adults or a family of four with moderate portions.
- A kitchen where the AF400’s width would crowd prep space.
- Meals built from a compact protein in one zone and side in the other.
- Buyers who want Dual Zone flexibility without maximum capacity.
Ninja AF400: who should choose it?
- Four larger portions, meal prep or frequent guests.
- Foods that need a wider single layer inside each drawer.
- A household that currently runs a smaller dual air fryer twice.
- Enough counter, ventilation and circuit capacity for the larger unit.
Sync, Match or one drawer: which mode do you need?
- A main and side with different cooking times: use SYNC to coordinate the finish. The shorter program can show HOLD while the longer program runs; in this SYNC context, that is the waiting stage, not a request to start both drawers again.
- The same food in both drawers: MATCH copies the cooking settings to the second zone. Divide a larger batch between the drawers rather than treating their combined litres as one wide basket.
- A small meal in one drawer: both models also support single-zone cooking. Select and set the zone you intend to use; you do not need a second food or a matched program just because the appliance has two drawers.
These are control-mode distinctions, not evidence that one model cooks faster or uses less electricity. Follow the instruction booklet for your full model suffix when setting the controls.
What fits in each drawer?
Ninja states that an AF400 drawer can fit up to 1.4 kg of fries or a 2 kg chicken in its own product examples. Treat these as maximum fit claims, not a promise that every load will crisp evenly. The AF300’s 3.8 L drawers are better matched to smaller proteins and sides. Always leave clearance from the heater and verify food safety with a thermometer.
Cleaning and ownership
Two drawers and two crisper plates mean more parts than a single basket, but they also keep foods separate. Wash grease promptly, use soft tools and check that your sink or dishwasher can comfortably accept the larger AF400 drawers. Replacement parts must match the exact model suffix; similar-looking AF300 and AF400 drawers are not interchangeable.
Replacement drawers and crisper plates: AF300UK vs AF400UK
The official UK parts listings below were checked on 19 October 2026. A drawer and its removable crisper plate are separate listed parts. Check which component you need, the drawer position and the full model code on your appliance before ordering.
| Part | AF300UK reference | AF400UK reference |
|---|---|---|
| First drawer | Drawer 1: 4237CY |
Left drawer: 4412CY |
| Second drawer | Drawer 2: 4238CY |
Right drawer: 4413CY |
| Crisper plate | 4239CY |
4411CY |
Do not infer compatibility from a similar name or the “EUUK” in a part number. This is a UK reference, not confirmation for every AF300EU, AF400EU or US DualZone variant. Use Ninja’s model-based parts finder if your suffix differs, and confirm the compatibility on the linked part listing. The table identifies parts; it does not promise current stock, price or that a plate is included with a replacement drawer.
AF300 vs AF400 decision in 30 seconds
Pick AF300 if two 3.8 L drawers already hold your main and side. Pick AF400 if 4.75 L per drawer prevents a second batch. If you want one wide chamber rather than two permanent drawers, compare a flexible-divider model instead.
Our verdict
The AF300 is the better default because it gives the full Dual Zone experience in a more manageable size. The AF400 is the better appliance only when its extra 1.9 L total capacity solves a recurring load problem. Capacity you use is valuable; capacity that permanently occupies the counter is not.
How this comparison was researched: this is specification-led analysis, not a hands-on test. The capacity comparison was originally reviewed on 26 September 2026; UK control-mode guidance and the linked replacement-part references were checked against Ninja’s official product and support sources on 19 October 2026. Regional AF400UK and AF400EUWH identity and internal routing were rechecked on 23 October 2026. We have not measured cooking performance, energy use or internal basket dimensions. Household-fit recommendations are editorial judgments, not tested serving guarantees.
Official sources
- Ninja AF300UK official product page
- Ninja AF400UK official product page
- Ninja AF300UK series control and ownership FAQs
- Ninja AF400UK series instruction booklet support page
- SharkNinja Belgium AF400EUWH official product page
Frequently asked questions
What is the main difference between Ninja AF300 and AF400?
Capacity. The AF300 has 7.6 L total, normally two 3.8 L drawers. The AF400 has 9.5 L total, two 4.75 L drawers. Both use the same basic two-zone Sync/Match idea.
Is the Ninja AF400 worth it over the AF300?
Yes if the larger drawers prevent second batches or fit the proteins you cook. If the AF300 already holds your normal main and side, the AF400 mainly adds footprint and unused volume.
Which Ninja Dual Zone is best for a family of four?
The AF300 is often sufficient for four moderate portions. Choose AF400 for larger appetites, meal prep, guests or food that needs more drawer floor area.
Can AF300 and AF400 cook two foods at different temperatures?
Yes. Each drawer can use its own time, temperature and compatible cooking function, and Sync can coordinate the finish. Match copies settings to both zones.
Are Ninja AF300 and AF400 drawers dishwasher safe?
Ninja lists removable drawers and crisper plates as dishwasher-safe for these families in relevant regional guidance. Check the exact model manual, and consider gentle hand washing to protect coated surfaces.
Are AF400UK and AF400EUWH the same model?
They belong to the same 9.5 L AF400 family, but they are different regional model codes. AF400UK is the UK model, while AF400EUWH identifies the white European version. Confirm the exact suffix for the plug, warranty and compatible replacement parts.
Read the exact UK model reviews
The AF300UK review covers its 7.6-litre two-drawer layout. The AF400UK review explains the larger 9.5-litre UK model. Each has its own electrical rating and regional support; a US DualZone Amazon offer is a different model.
Continue with the Ninja model directory, household guide, capacity and counter-space guide, cooking-layout guide and buying-priorities checklist.
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
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