Ninja Double Stack Air Fryer SL300UK – Compact, Powerful, and Multi-Level
- Save Space, Cook More: 25% slimmer than Ninja AF300 yet holds 7.6L capacity – enough for 6 portions. Compact vertical design optimizes kitchen space.
- Cook on 4 Levels Simultaneously: Equipped with 2 drawers and 2 racks, allowing 4 layers of cooking with consistent airflow and crisping via rear fans.
- Fast & Efficient: Cooks up to 55% faster than traditional ovens and uses less energy. Ideal for busy households seeking speed and economy.
- 6 Smart Cooking Functions: Air Fry, Max Crisp, Roast, Bake, Reheat, and Dehydrate – delivering versatility at your fingertips.
- SYNC & MATCH Zones: Independent control of each drawer lets you cook different meals or sync them to finish together.
- Easy to Clean: All removable parts are dishwasher safe. Includes 2 x non-stick crisper plates and racks for convenience.
Technical Specifications
| Capacity | 7.6 Litres (2 x 3.8L Drawers) |
| Cooking Levels | 4 (2 Drawers + 2 Racks) |
| Functions | Max Crisp, Air Fry, Roast, Bake, Reheat, Dehydrate |
| Colour | Black / Grey |
| Dimensions | 42D x 28W x 38.5H cm |
| Weight | 9.76 kg |
| Material | Stainless Steel, Metal |
| Included | 2 Drawers, 2 Crisper Plates, 2 Racks, UK Plug |
Perfect for family meals, batch cooking, or quick snacks – Ninja’s SL300UK is your space-saving kitchen hero.
- it takes longer to cook things than the side by side did. I’d say maybe an extra 7-12 minutes.
- it doesn’t cook things as evenly and I have to shake/turn/ rearrange items throughout cooking.
If you don't want to 'cook' cook then this is the biz.
The only criticism I have is that the crisping plates can be a pig to clean, so I soak them. I did try the silicon baskets but found they are hard to clean, and they affect the cooking times and quality as the air doesn't circulate so well. I have seen reviews that say different, but this was me. It wasn't enough to lose a star.
Use the racks and the baskets easily
Make sure you have enough gap between counter and wall units.
Bought "used like new" for about £70 less than brand new, not in original box but very well packaged - did not contain tongs or recipe book but that wasn't a big deal.
Replaced our first air fryer which was a much cheaper brand and it's a clear case of you get what you pay for.
Wouldn't hesitate in recommending - very happy chappy.
Smaller footprint and vents blow to the right hand side. Perfect if you are happy with 9.5ltr draws.
Makes great Mac N Cheese
Have toasted a chicken in it twice as it has a roast option came out delicious
He was very pleased with it. It was easy to use & cooked the food beautifully
NB: there seems to be a few negative comments on this air fryer, mainly from the US, where they have 120v mains, whereas in the UK we have 240v mains. It seems when using both compartments in the US their mains power cannot cope with that and so the air fryer under performs and stuff can be unevenly cooked. We do not seem to have this problem in the UK.
The instructions also clearly state you need to turn/shake the food three times during cooking, to ensure even cooking, (as in this model the hot air comes from the back, not from above like most air fryers) and I think some people just don't do this. In my experience the air fryer works very well when its used properly. I would not hesitate to recommend it.
just the space saving alone is worth investing in they air fryer. counter space comes at a premium. the golden black version isn't cheap looking in reality. in pictures it would seem as some cheap looking copper gimmick. well don't worry about it looking cheap. its not
the start up function is different form the older model and needs a bit of learning curve . I wanted to return it due to this issue however the space saving design stopped me.
it comes with all necessary accessories like internal grill racks and tongs. there isn't much else you need except maybe butter paper trays to put on base of bowls to keep oil in check and make cleaning easier.
the air vents now go out from the right side. the same side the control panel is at. so you can't keep it against a wall on the right side . at least not plain against the right side.
noise same as older models . not much different . beeping also same
warranty is very nice. ninja immediately replies to emails and calls. so no danger of being left hanging high and dry
air fryer lasts about 2 to 3 yrs before it needs deep cleaning . so no matter which company you buy it from you will eventually have to deep clean it. never done as the last one broke near the 2 yr mark and ninja replaced it.
why is this the no 1 best selling air fryer. well customer service . as I just mentioned above. and they used common sense in designing this item .
air fryer vs deep fryer
well the taste isn't much different after using air fryer for 3+ yrs. wished has bought it years ago instead of deep fryer. don't go for deep fryer. the potato chips fry better in this then any deep fryer could ever fry them. and they taste good. at least marks and Spencer frozen chips. you get the idea.
cleaning the internal plates in dishwasher. the external bowls are rinsed with soapy hot boiling water . so not much of an issue. maybe weekly cleaning is ok for most people or maybe once in 2 weeks.
toxins. well if you are afraid of toxins then you probably also have mental health issues which can't differentiate between which toxins else to avoid and your focus is on air fryer toxins as they are easier to paddle to simpleton folks. what about body spray toxins or milk from gm cows or air form car exhausts which are now nearly impossible to avoid. it your choice of poison vs ease of life. what do you choose you would like to be affected by. there is no avoiding toxins. so personal preference here.
The World promised to become a paradise ... it was a disaster.
The chips were nowhere near that deep fry satiety you always got.
Modern day politics has taken society to the depths of despair - and this is our
only saviour. The last bastion of feel good left, that only chips can fulfil.
This is a dangerous piece of kit, within 19mins or so those chunky chips are ready, which
means you could be eating a lot more chips than you used to.
I'll be honest, I'm not fussed with the multitude of different foods it can handle - chips are the
be all and end all for me - however, those frozen bakes were baked to perfection.
No more emptying the oven of oil pan and baking trays for two bakes and a few chips that you had to individually flip, which all meant you didn't end up going to the bother of emptying the oven in the first place.
A half-time shake is all you need for the chips, and, you can get away with not flipping the bake as it sit's on the rack.
No more heating the oil to the right temperature, overcooking the chips because you were on the phone or getting spat at - this is the easy way.
There are a lot of brands to choose from but Ninja really do make good quality products so it was the natural choice for me, all though you can buy cheaper ones. The copper finish looks a lot better than the standard silver one, already have enough silver/grey items around, definitely stands out amongst the other kitchen gadgets.
If you have the space, the larger ones come with the rack. Ending up buying one for family, but they only have enough space for the smaller one - which doesn't have the rack option - glad I have the space, having now used both, the rack is definitely worth having.
Chips underneath, bake on top - the biggest loser in all of this is probably Greggs ... except when you have to work away, but working from home, this is awesome.
The contents of your freezer is going to change - that second bag of frozen chunky chips is going to evict something else :)
HOWEVER, if there is one issue with this air fryer, it's the Temp & Time buttons.
They are too close to the menu selection wheel and you have to press them with your finger sideways, you can't comfortably press them directly, as you can with the other ones.
It is annoying.
Then I trieda larger roast chicken , which I cooked at 175 roast for a hour or so , with cooked nice with crispy skin , roast potatoes cooked wonderfully crispy on out side yummy on the inside , sausages also cooked great , love the different setting you get roast, bake , reheat etc ,many more things to try , high recommend this product !
Only think about this airfryer side walls can get very hot when you have both baskets is on cooking.
For me Christmas come early…
The drawers are so much easier to clean with a much improved non stick coating and after getting used to how to time everything any cut of meat i have cooked thus far has come out less dry nad much more juicy too and takes up so much less space in my kitchen while giving more volume inside to cook with
It is easy to use, the dual stacks with sync function is brilliant, set it up and then you can go off and do other things - I found this quick to set up and not complicated at all as I am not the best with technology.
Super easy to clean
This was well worth the investment.
The two drawers work independently, so I can cook different foods at the same time with ease. The air fryer heats up quickly and cooks food evenly, delivering perfectly crispy and delicious results without much oil. It’s easy to clean, and the non-stick coating on the racks makes washing up a breeze. The sleek black design looks modern and fits nicely in my kitchen without taking up too much counter space.
Overall, the Ninja Double Stack Air Fryer is a game changer for meal prepping, and I highly recommend it for anyone looking to upgrade their kitchen appliances!
It takes a little time to work out how to use the settings as there is the function to sync your cooking times, and other features that weren't on our older model.
Now, I generally hate stuff on my worktops, but this takes up little space and looks so stylish. It will definitely be a keeper for my new house. I read through the instructions and sighed at first thinking, this is lengthy, but actually it isn't. Basically cook individually in the top or bottom drawer. There are 2 tiers to each drawer so an entire meal is do-able. The best bit is you pop it all on and press the sync button and hey presto - the whole meal finishes at the same time! Mind blown.
If in any doubt and you are wondering if you can air fry something, just a quick google search sorts you out. Buy with the handy liners and then there is zero cleaning involved. And a top tip, for the love of God, DO NOT LEAVE the liner in to catch fire as my Mum did. There were flames. Don't do that!
This is worth every penny and I am going to buy my children one each.