Ninja AD350CO vs DZ401: Which Air Fryer Suits Your Kitchen?

The DZ401 wins because it takes the same 10-quart platform and finishes the job. You get 450 F heat, Air Broil, and IQ Boost. It sells everywhere and usually costs the same or less than the AD350CO. The AD350CO suits Costco shoppers who rarely cook hotter than 400 F. Everyone else should start with the DZ401.

Here is the matchup at a glance, with our scores and official specs.

The Ninja AD350CO is the Costco channel version of Ninja's 10-quart dual-basket Foodi platform. Some retailers sell it as the same item as the DZ401. One listing notes the box says AD350 while the item inside is the DZ401. The differences come down to the max temperature, the 6th mode, and the sales channel.

Design and Build Quality

Build quality is where the Costco savings show up. The AD350CO has a plastic-heavy body with aluminum baskets and a nonstick coating. Its crisper plates are PTFE-free ceramic. It weighs 19.8 lbs per official specs, though a few listings report 25.1 lbs. It measures about 17 inches deep per official specs. Like the DZ401, it wants roughly 18 inches of clear counter space, so measure first.

Key Features

At the core of the AD350CO is DualZone Technology. Two independent 5-quart baskets each have their own fan, heater, and controls. Smart Finish makes both zones end at the same time. Match Cook copies one basket's settings to the other. The 6-in-1 programs are Air Fry, Roast, Bake, Reheat, Dehydrate, and Keep Warm.

Pros and Cons

Where the AD350CO lives at Costco, the DZ401 sells everywhere: Amazon, Ninja's own site, big-box stores. Same platform, with a higher heat ceiling and more programs.

Design and Build Quality

The DZ401 pairs stainless steel construction with a 100% PFAS-free nonstick cooking surface. That is the durability story. It is also a genuinely big machine. Official and retailer figures put it at 19.8 to 21.6 lbs. It wants roughly 18 inches of clear counter space.

Key Features (Smart Finish, Match Cook, IQ Boost)

Like the AD350CO, it runs DualZone. Two independent 5-quart baskets each have their own cyclonic fan and rapid heater. Smart Finish coordinates both zones so two dishes finish together. Match Cook copies one basket's settings to the other. IQ Boost is Ninja's name for automatic power balancing when neither sync feature runs. The 6-in-1 programs are Air Fry, Air Broil, Roast, Bake, Reheat, and Dehydrate.

Pros and Cons

For all the feature noise, the two are closer than they look. Both use two independent 5-quart baskets inside a 10-quart total. Both run Smart Finish and Match Cook, draw 1690W, and share the same digital controls. Both have dishwasher-safe baskets and crisper plates. Both also get loud when both baskets run.

Those identical specs are why some retailers sell the two as the same unit. The differences live in the max temperature, the 6th mode, and the sales channel. Decide what you need past 400 F, and the choice makes itself.

Four differences actually matter.

Temperature Range and Cooking Modes

The headline difference is heat. The DZ401 runs 105 F to 450 F; the AD350CO stops at 400 F. The official listings differ. For short, hot cooks like broiled fish or a fast sear, you want 450 F. The 6th mode swaps too. The DZ401 gets Air Broil, the AD350CO gets Keep Warm. If you already own a broiler or toaster oven, the 400 F ceiling is easy to live with. If you want one appliance to do it all, Air Broil closes the gap. The official Ninja DZ401 product page lists the full program set and the 105 F to 450 F range.

Capacity and Basket Design

Here the two are identical. Both offer a 10-qt total, two independent 5-qt baskets, and the same footprint. The baskets differ in material. The AD350CO uses aluminum with a nonstick coating and PTFE-free ceramic crisper plates. The DZ401 uses 100% PFAS-free nonstick in a stainless steel build. Both release food cleanly and both are dishwasher safe. Neither handles overloads. About 8 wings or a pound of fries per basket, in one layer, is the crisp ceiling.

Build Materials and Weight

The build tells where each model was meant to sell. The DZ401 leans on stainless steel construction. The AD350CO is the plastic-heavy, Costco-priced version. Both are heavy. The AD350CO is 19.8 lbs per official specs. The DZ401 ranges from 19.8 to 21.6 lbs depending on the source. Both need a real spot on the counter, so measure first.

Price and Availability (Costco-exclusive vs sold everywhere)

The DZ401 lists at $229.99 and typically sells for $179.99 on Amazon. Street pricing moves week to week. The AD350CO runs about $200 in a Costco warehouse, a price Costco never publishes online. Warehouse pricing varies by location and season. Check the current DZ401 price on Amazon before you commit.

The availability split is the bigger deal. The DZ401 sells everywhere. The AD350CO is a Costco warehouse exclusive (item 3388088), absent from Ninja's website. On Amazon it exists only as the renewed Ninja AD350CO listing from a third-party seller. Scratch-and-dent units have also appeared on Woot for about $100 with a 90-day warranty.

Smart Features (Smart Finish, Match Cook, IQ Boost)

Both models ship with Smart Finish and Match Cook. Smart Finish staggers the two zones so both dishes land at the same moment. Match Cook copies one basket's settings to the other. The real difference is IQ Boost. The DZ401 names its power balancing IQ Boost and gives it a button. The AD350CO has no button or branding. Its owner's manual describes the same power optimization when the two zones run on different settings. Only the name and the button are DZ401-only.

In the kitchen, the DZ401 earns its higher score. Wings came out crunchier than the same recipe in a conventional oven. Frozen fries finished in about 16 minutes with a crisp snap. Reheated pizza beat the microwave. A whole 5-pound chicken fit in one basket and roasted well. The first attempt needed an extra 10 minutes. Most batches want a flip or a toss halfway through. It also needs a preheat, despite the no-preheat marketing. Ninja rates the dual zones up to 30% faster than a conventional oven on two 6-pound chickens.

The AD350CO cooked the everyday stuff well, but vegetables came out dry. The power split is the real trade-off. Chicken wings took 18 to 22 minutes in a single basket. Split across both, they took 43 to 47 minutes. Overcrowd a basket and the food steams instead of crisping.

Both use the same control scheme. There is a digital display, a center dial, and separate settings for each zone. One quirk: the DZ401's knob sometimes switches modes as you push it to start. That is why we double-check the screen.

Cleaning is where both machines earn their keep. Baskets and crisper plates are dishwasher safe on both. That is nearly the whole story. The DZ401's baskets show no staining after two years of regular dishwasher cleaning. Add a liner or parchment paper and cleanup takes two minutes.

Noise is the honest weak spot. Both units get louder when both baskets run. That is also when you are most likely to use them.

Choose the AD350CO if...

• You already shop at Costco and want the 10-quart platform at warehouse pricing, about $200
• You do most of your air frying below 400 F, and a broiler or toaster oven covers the rest
• You cook one basket at a time, so the two-basket power split never bites
• You are fine buying new at the warehouse instead of gambling on a renewed online unit

Choose the DZ401 if...

• You want the full feature set: 450 F heat, Air Broil, and named IQ Boost
• You cook two dishes at once and want Smart Finish to land them together
• You want to buy anywhere, with easy returns and standard support
• You want the version of this platform we would buy again after two years of daily use

The Bottom Line