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🧼 Clean smarter, not harder — the future of cordless vacuuming is here!
The Shark Clean and Empty Cordless Vacuum Cleaner combines 50% more suction power with a unique automatic dirt disposal system that seals away debris for up to 30 days. Lightweight and flexible, it features anti-hair wrap technology perfect for pet owners, dual removable batteries for extended runtime, and a foldable wand for easy reach and storage. Designed for busy professionals who demand efficiency and convenience, it offers powerful cleaning on multiple surfaces with minimal maintenance.
| Brand | Shark |
| Model Number | BU3521UK |
| Color | white/blue |
| Product Dimensions | 35.3 x 26.4 x 109.2 cm; 2.7 kg |
| Capacity | 1.3 Liters |
| Power / Wattage | 240 watts |
| Voltage | 240 Volts |
| Noise Level | 80 dB |
| Runtime | 40 minutes |
| Special Features | Automatic empty base, anti-allergy full seal, hair wrap, automatically adjust to floor type, charging base, up to 40 minutes run time |
| Item Weight | 2.7 Kilograms |
B**M
Shark Vac Clean and Empty - Excellent Product
I have had this for a year now and can give a fair review. PROS: Excellent performance, I had a Dyson V8 pet before and this really out performed it. As I have two cats this was chosen to deal with the shedding and it handles this task like a boss. I have carpet and hard floors I have no problem as it automatically changes suction to deal with both. Very versatile and cleans well No cords to wory about and the battery life is very true to time cleaning. I get around 30 minutes full power. 40 minutes on Eco power. LED indicators lets you know how much battery you have left. You also can choose different cleaning modes on the handle area on a press of a button. Very easy to take out filters and de-asemble to clean. Really like that it has little buttons to clean the entire vacuum for good maintenance. Quick and easy. The clean and empty feature means no need to be fiddling with emptying the Vacuum manually. Its very light weight and easy to move around/ carry. Amazon sells all the required Shark filters so I got a 4 set and stocked put. So while filters are clean/ washed and drying I can use a new one without waiting. CONS: You will need to empty vacuum by sitting it on the clean and empty cradle often while cleaning as the cup will fill quickly as its small but not a problem just a thought to keep in mind if you have a large home. However thats quick just place it on the stand and it suctions out in seconds. You must have the moon lit botton off to empty the vacuum. If the moon lit botton is on that's the quiet mode setting and it will not empty vacuum it you sit it on the stand with it on. Cleaning the filters - I would say to wash these every month or so if you use the vacuum every day or 2 days like I do. I had this for 1 year and I only just cleaned all filters in the Vacuum and the dust collection bin. There are 3 fillers in the dust collection bin, 2 sponges and 1 HEPA filter. In the main vacuum there is one HEPA filter. So 4 in total. Dish liquid and a dish brush can be used to clean HEPA filters. Let them completely air dry before re-inserting them in the Vacuum. The cleaning can be around 30 minutes depends on how dirty your vacuum is. There are little buttons on the Vacuum and the empty bin to get to the filters. Its very easy to take each part apart to clean. Overall excellent product I will recommend it and will also stick with any version of the Shark clean and empty. I am extremely pleased with this product. 10/10
R**E
2 drawbacks
This is an excellent product but any buyer should be aware of two things: 1. Despite all the hype, you will NOT be able to clean a bog-standard UK 3-bed semi in one go. I can get about 75% done on one charge. It might be JUST possible if your house has little or no carpets but mostly or completely laminate flooring. Otherwise, budget for a second battery - £90 from Shark, £30 and up for "compatibles" or (my choice) do the house in two separate goes. 2. The power cord is ridiculously short. I have an outlet in the under-stairs cupboard that is about 1.5m above the floor and it won't reach.
W**E
Best I've ever owned
This is amazing . It is strong at picking up everything adjusts it's self from carpet to tiles. Then when you put it back on the charging stand it get rid of the dirt in a container at the bottom so all you have to do is when it full dispose of it. Best on I have ever owned. And I've had 3 Dysons. Definitely would recommend it.
D**E
Good
Good
S**E
Not cheap but worth the money
The vacuum itself is light and easy to carry around and can’t be shortened to a handheld version with two alternative heads. I’ve used it on wooden floors and rugs and does a decent job. The empty function has shaved a lot of time and hassle. It sometimes struggles if the device is full but you can empty it a little manually. The bigger box is relatively easy to empty but does let out a lot of dust when you first open it. On thicker rugs you’ll need to go over areas multiple times but otherwise it only needs a one over. If you’re hoovering on carpets on rugs, you may need to apply extra pressure to ensure it’s on the right setting to pick up dirt. It works wonders on the cat hair that’s everywhere!
Trustpilot
1 week ago
3 weeks ago