Ninja SL201 Vs SL401 Vs SL451: Which DoubleStack Air Fryer is Right for Your Kitchen?
Ninja has redefined countertop cooking with its new DoubleStack air fryer series, offering a smarter and more space-efficient way to air fry, bake, roast, and more. With models like the Ninja SL201, SL401, and SL451, users now have multiple options to choose from – each designed to deliver faster meals without compromising on flavor or convenience.
These vertically stacked air fryers feature dual independent baskets, allowing you to cook two foods at once using different settings. But while the design is consistent across the range, each model offers unique features, capacities, and functions to suit different households and cooking styles.
In this detailed Ninja SL201 vs SL401 vs SL451 comparison, we’ll explore how these three models stack up against each other – literally and functionally – to help you pick the one that truly fits your kitchen needs.
Ninja SL201 vs SL401 vs SL451: Comparing the DoubleStack Air Fryer Lineup
| Features | Ninja SL201 | Ninja SL401 | Ninja SL451 |
|---|---|---|---|
| Dimensions | 11.25"Dx17.79"Wx15.14"H | 11.25"Dx19.22"Wx15.14"H | 11.25"Dx19.22"Wx15.14"H |
| Material | High End Plastic | High End Plastic | High End Plastic |
| Weight | 21.28 Pounds | 23.15 Pounds | 26.46 Pounds |
| Color | Black | Grey | Deep Gray 004 |
| Capacity | 8 Quarts | 10 Quarts | 10 Quarts |
| Cooking Functions | Air Fry, Air Broil, Roast, Bake, Reheat, and Dehydrate | Air Fry, Air Broil, Roast, Bake, Reheat, and Dehydrate | Air Fry, Air Broil, Roast, Bake, Reheat, and Dehydrate |
| Smart Thermometer | No | No | YES |
| BPA Free | Yes | Yes | Yes |
| Nonstick Basket | Yes | Yes | Yes |
| Dishwasher Safe | Yes | Yes | Yes |
| Power | 1690 Watts | 1690 Watts | 1690 Watts |
| Special Features | Dual Zone Features, Temperature Control, Automatic Shut-Off, Programmable | Dual Zone Features, Temperature Control, Timer, Automatic Shut-Off, Programmable | Dual Zone Features, Temperature Control, Automatic Shut-Off, Programmable |
| Amazon Rating | 4.6/5 Star | 4.6/5 Star | 4.6/5 Star |
| Buy on Amazon | Buy on Amazon | Buy on Amazon | Buy on Amazon |
Dimensions and Design
While all three models in the DoubleStack series share a similar vertical design, the Ninja SL201 is slightly more compact. It measures 11.25″ D x 17.79″ W x 15.14″ H, making it a great option for kitchens with limited counter space.
On the other hand, both the SL401 and SL451 are a bit wider at 19.22″, though they retain the same height and depth. This extra width accommodates the larger cooking baskets found in the higher-end models, offering more space without taking up too much vertical room.
- SPACE SAVING DESIGN: Ninja’s stacked design lets you cook double the food in nearly half the space and still fits under standard cabinets. Plus, it’s 40% slimmer than your traditional 2-basket air fryers.
- DOUBLESTACK AIR FRYING TECHNOLOGY: Only Ninja’s stacked design has 2 independently controlled baskets so you can cook 4 foods at once.
Weight Comparison
Weight plays a role when it comes to portability and ease of handling. The Ninja SL201 is the lightest of the three at 21.28 pounds, while the SL401 steps up slightly to 23.15 pounds. The heaviest is the Ninja SL451, weighing in at 26.46 pounds, which makes sense given its extra features and build.
If you’re looking for a model that’s easier to move around or store, the SL201 might be a better fit, whereas the SL451 offers a more robust build for those who don’t mind the extra weight.
- SPACE SAVING DESIGN: Ninja’s stacked design lets you cook double the food in nearly half the space and still fits under standard cabinets. Plus, it’s 40% slimmer than your traditional 2-basket air fryers.
- DOUBLESTACK AIR FRYING TECHNOLOGY: Only Ninja’s stacked design has 2 independently controlled baskets so you can cook 4 foods at once.
Color and Aesthetic Options
When it comes to visual appeal, each model has its own unique color tone. The Ninja SL201 comes in a classic black, blending seamlessly into most kitchen themes. The SL401 is available in a grey finish, while the premium SL451 offers a deep gray 004 shade that gives it a sleek, high-end look. If aesthetics matter in your kitchen setup, the color variation may help influence your choice.
Cooking Capacity
One of the biggest differences between these models is capacity. The Ninja SL201 offers 8 quarts of total cooking space, split between two vertically stacked 4-quart baskets. The SL401 and SL451, however, both come with a larger 10-quart capacity, making them ideal for families or anyone who wants to cook more food at once. The added space in the SL401 and SL451 is perfect for cooking main dishes and sides simultaneously without overcrowding.
- SPACE SAVING DESIGN: Ninja’s stacked design lets you cook double the food in nearly half the space and still fits under standard cabinets. Plus, it’s 40% slimmer than your traditional 2-basket air fryers.
- SMART COOK SYSTEM: Achieve the perfect doneness, from rare to well-done, at the touch of a button with the integrated Foodi Smart Thermometer—no guesswork required.
Smart Cooking Features
While all three models include essential cooking functions – Air Fry, Air Broil, Roast, Bake, Reheat, and Dehydrate – only the Ninja SL451 includes a Smart Thermometer, giving it a distinct edge for precision cooking. This feature allows for more accurate temperature control, especially when cooking meats or multi-layered meals. If you often prepare dishes that require precise doneness, the SL451’s smart thermometer is a game-changer.
Special Features
All models come with Dual Zone Technology, Temperature Control, Automatic Shut-Off, and Programmable Settings. However, the SL401 adds a timer feature, making it slightly more functional than the base SL201.
The SL451, while sharing most of the same features, further enhances usability with the Smart Thermometer. In short, the SL201 is a more streamlined version, the SL401 introduces a bit more flexibility, and the SL451 packs in the most convenience for serious home cooks.
Power and Performance
Interestingly, all three models share the same power output of 1690 watts, which ensures consistent cooking performance across the lineup. Whether you’re using the SL201, SL401, or SL451, you can expect fast and even heating for crispy, golden results.
Ease of Cleaning and Build Material
All three models are made from high-end plastic, ensuring a durable yet lightweight design. They also include nonstick baskets and are dishwasher safe, making cleanup quick and effortless. Plus, they’re all BPA-free, ensuring safe cooking with no harmful chemicals.
User Ratings
Each of the three models has received an impressive 4.6 out of 5 stars on Amazon, showing consistent customer satisfaction across the board. This suggests that no matter which model you choose, you’re likely to have a positive experience – though your specific needs will determine the best fit.
Price and Value
The pricing varies depending on the model and features. The SL201 is the most budget-friendly, ideal for singles or couples. The SL401 offers a balance of capacity and features, while the SL451 commands a slightly higher price due to its Smart Thermometer and larger build. Each model offers great value for its price point, especially considering Ninja’s reliability and performance.
Pros and Cons: Ninja SL201 vs SL401 vs SL451
Ninja SL201 – Pros & Cons
Pros ✅
- Compact and space-saving design
- Lightweight and easier to move or store
- Same powerful 1690W performance as higher models
- Full set of cooking functions (Air Fry, Broil, Bake, etc.)
- BPA-free, nonstick baskets, and dishwasher safe
- Most affordable in the lineup
Cons ❌
- Smaller 8-quart capacity may not be enough for larger families
- Lacks a timer function and smart thermometer
- Fewer premium features compared to SL401 and SL451
Ninja SL401 – Pros & Cons
Pros ✅
- Larger 10-quart capacity – ideal for families or meal prep
- Includes timer feature for more controlled cooking
- DualZone technology with Sync features
- Same compact vertical design despite larger size
- Still lighter than the SL451
Cons ❌
- No smart thermometer for internal temperature tracking
- Slightly heavier and wider than SL201
- Mid-range price might not appeal to budget shoppers
Ninja SL451 – Pros & Cons
Pros ✅
- Smart Thermometer for precision cooking
- Largest and most advanced model in the series
- Full 10-quart capacity in vertical DoubleStack format
- Ideal for serious cooks or frequent meat preparation
- Sleek “Deep Gray 004” design adds a premium touch
Cons ❌
- Heaviest model – less portable than SL201/SL401
- Highest price point among the three
- Might offer more features than casual users need
Frequently Asked Questions:
- What is the main difference between Ninja SL201, SL401, and SL451?
The key differences lie in cooking capacity, weight, and features. The SL201 offers an 8-quart capacity, while the SL401 and SL451 provide a larger 10-quart capacity. Only the SL451 includes a built-in Smart Thermometer for precision cooking. All three use the same DualStack vertical design but differ slightly in width, color, and functionality.
2. Does the Ninja SL451 really need a Smart Thermometer?
If you frequently cook meats or dishes where exact internal temperature matters, the Smart Thermometer in the Ninja SL451 is extremely useful. It ensures perfect doneness without guesswork. However, if you only need basic air frying or roasting, the SL201 or SL401 may be sufficient.
3. Are the baskets dishwasher safe in all three models?
Yes, the Ninja SL201, SL401, and SL451 all come with nonstick, dishwasher-safe baskets, making cleanup easy and hassle-free. They’re also BPA-free, ensuring safe cooking for your family.
Ninja SL201 vs SL401 vs SL451: Winner?
Choosing the right air fryer can make a significant difference in how efficiently and conveniently you prepare meals – and Ninja’s DoubleStack series offers something for everyone. In this Ninja SL201 vs SL401 vs SL451 comparison, we’ve explored the similarities and key differences that set each model apart.
The Ninja SL201 is a great option for individuals or couples who want a compact, reliable air fryer with essential functions and a budget-friendly price tag. The Ninja SL401 builds on that with a larger capacity and a slightly wider design, making it ideal for medium-sized households that want a bit more room and flexibility. Meanwhile, the Ninja SL451 stands out as the most feature-rich model, thanks to its Smart Thermometer, making it perfect for users who prioritize precision cooking and enhanced control.
All three models feature Ninja’s trusted Dual Zone technology, multiple cooking functions, and a modern vertical design that saves counter space without sacrificing performance. Ultimately, the best choice depends on your cooking habits, kitchen space, and how much automation or precision you need.
Whether you’re upgrading your old air fryer or trying one for the first time, this Ninja SL201 vs SL401 vs SL451 guide should help you find the perfect fit for your culinary needs.
