Shark Clean & Empty Cordless Vacuum Cleaner with Auto-Empty
265/4564£199.99
*- Save £150.00Was £350.00
Check stock
Check stock to see your delivery and collection options:
Sign in or register to save items to your account. Simply tap the heart again to remove.
About this product
Meet the cordless vacuum that empties itself, so you don't have to. After every clean, Shark Clean & Empty automatically deposits the dirt into a completely sealed base that holds dirt and debris for up to 30 days – so you can forget about emptying for weeks at a time. No more manual emptying after every clean. Enjoy powerful cleaning results on carpets and hard floors with an auto-adjusting brush-roll. Easily detach the handheld vacuum to clean anywhere with the included Crevice and Pet Tools.
Auto-Empty System automatically empties the vacuum into a large bagless base after every clean.
Fine dust particles are sealed away inside the base.
Auto-adjusts brush-roll for carpets and hard floors.
LED headlights on the floorhead illuminate hidden debris around your home.
Floor suitability:
- Suitable for carpets and rugs.
- Suitable for deep pile carpet and rugs.
- Suitable for wool carpet.
- Suitable for hard floors.
- Suitable for laminate flooring.
- Suitable for upholstery.
- Suitable for stairs.
Vacuum cleaner features:
- Weight 2.65kg.
- Size H110.8, W26.4, D35.6cm.
- Charge time: 5 hours to fully charge.
- Running time from 1 minutes to 40 mins, depending on the setting used.
- Low battery indicator.
- Number of batteries in pack: 1.
- Detachable handheld included.
- Comes with a docking station.
- Power boost - clean with increased power.
- Washable filter - wash regularly to maintain suction.
- Motorised floor head - drives bristles in to carpet to remove ground in dirt.
- Includes crevice nozzle, .
- 21.6 volts.
- Noise level: 84dB.
Handheld vacuum cleaner features:
- 21.6 volts.
- 40 mins running time on full charge.
- Charging time: 300 minutes.
- Low battery indicator.
- Variable power.
- Total capacity 1.3 litres.
- Crevice Tool, 20cm Multi Surface Tool.
- Size H110.8, W26.4, D35.6cm.
- Weight 2.65kg.
General information:
- Model number: BU3521UK.
- Manufacturer's 5 year (2 year on batteries) guarantee.
- EAN: 0622356297622.
4.3
345 reviews
83%
Recommended this product
Customers Say
Lightweight, powerful Shark cordless vacuum with self-emptying base praised for ease of use and suction. Battery life and clogging issues noted. Mixed reviews on durability and carpet/hair pickup performance.
An AI generated summary based on recent customer reviews
Each review is verified as authentic by our independent third party and we only publish reviews from customers or Argos Testers who have purchased or used the item. Customers are incentivised to submit product reviews as part of a prize draw.
Lightweight with great power
The suction on this is great, it really grips the carpet. It’s light weight and easy to use. Really like the self cleaning unit.
Ananana, 45 - 54
Great for elderly
Great light vacuum has every thing any one could want .Powerful cordless and light weight .The self cleaning is just a bonus
Helper, 65 or over
Great product
Upgraded to this vacuum recently and absolutely delighted with it so far. Lightweight and easy to use. Really like the auto empty function
Janice
Amazing vacuum
Amazing vacuum, it’s so strong and can work out whether it’s carpet or hard flooring. Picks up everything and best thing is I don’t have to empty it after every use
null, 35 - 44, Chichester
Very lightweight to use - auto empty feature.
I've used this cordless vacuum a few times now and am very happy with it. The auto empty system is helpful. The vacuum is very lightweight but doesn't feel cheap. Excellent value for money and much easier to use and store than previous models.
Dominique, 55 - 64, East Anglia
Get clean
Had it a week and very pleased with it. Don’t have to change heads for different floors
Jax76
Grey to use not heavy
Just does the job well
Vinnie, 65 or over
Very pleased with this vacuum cleaner.
Best vacuum cleaner we’ve had so far. Light, easy to use, can clean the whole house with one charge.
Tucson, 45 - 54
Suction, compact
Best hoover I have ever owned
Madi, 45 - 54
Disappointed
Had this just over a year when the collector stopped closing. Up to then it worked well. I’ve always had shark/ninja products and this has been my most disappointing.
Shark girl, 55 - 64
The wattage for the Shark Clean& Empty vacuum motor is 240 Watts.
Yes, the Shark Clean & Empty Cordless is designed to handle pet hair effectively, with Auto and Boost modes that adjust suction for carpets, hard floors, and stubborn hair. Its easy brushroll access, and the Auto‑Empty Dock, make removing pet hair quick, hygienic, and hassle‑free.
Here are some key differences between the two:
Dust container capacity:
IW4621UKT: 1.3 L dust container capacity.
BU3521UK: 0.42 L.
Overall battery runtime:
IW4621UKT: Up to 60 minutes.
BU3521UK: Up to 40 minutes.
Auto-empty base maximum capacity:
Shark IW4621UKT: Holds up to 45 days of dirt and debris.
Shark BU3521UK: Holds up to 30 days of dirt and debris.
Yes, the Auto-Empty dock is part of the Shark Clean & Empty vacuum.
The brushroll will not switch on on its own while the vacuum is in the upright position. The brushroll will only activate when you place your foot on the nozzle to disengage the lock.
Yes, the Shark BU3521UK comes with a 8" Duster Crevice Tool and a Pet Multi Tool which can be used to clean in small or tight areas.
The brush bar cannot be switched off entirely. We recommend testing the vacuum on an isolated area to prevent damaging sensitive fabrics.
The brush bar cannot be switched off entirely. We recommend testing the vacuum on an isolated area to prevent damaging sensitive fabrics.
The unit's base will include its own cable, which you will connect directly to the wall socket.
Inside the box of the Shark Cordless Stick Vacuum with Auto Empty System BU3521UK, you will discover an 8" Duster Crevice Tool.
The small print
*Prices correct as displayed but are subject to change.
The customer and brand answers you’ll see above are submitted independently. As we don’t review these answers, we can’t take responsibility for anything they may say. The responses from Argos colleagues are accurate at the time of publishing. For the latest info, you should check the product page.