---
product_id: 629749525
title: "Shark Clean & Empty Cordless Stick Vacuum – Lightweight Cordless with HEPA Filter, Portable, Rechargeable, Auto-Empty System, Stick Vacuum for Pet Hair, Carpets & Hardfloor, White, BU3521"
brand: "shark"
price: "€ 416.70"
currency: EUR
in_stock: true
reviews_count: 9
category: "Shark"
url: https://www.desertcart.ie/products/629749525-shark-clean-and-empty-cordless-stick-vacuum-lightweight-cordless-hepa
store_origin: IE
region: Ireland
---

# 40 min runtime HEPA filtration Auto-empty system Shark Clean & Empty Cordless Stick Vacuum – Lightweight Cordless with HEPA Filter, Portable, Rechargeable, Auto-Empty System, Stick Vacuum for Pet Hair, Carpets & Hardfloor, White, BU3521

**Brand:** shark
**Price:** € 416.70
**Availability:** ✅ In Stock

## Summary

> ✨ Clean smarter, live fresher with Shark’s hands-free power!

## Quick Answers

- **What is this?** Shark Clean & Empty Cordless Stick Vacuum – Lightweight Cordless with HEPA Filter, Portable, Rechargeable, Auto-Empty System, Stick Vacuum for Pet Hair, Carpets & Hardfloor, White, BU3521 by shark
- **How much does it cost?** € 416.70 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/629749525-shark-clean-and-empty-cordless-stick-vacuum-lightweight-cordless-hepa)

## Best For

- shark enthusiasts

## Why This Product

- Trusted shark brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Deep Clean Power:** Up to 40 minutes runtime with multi-surface auto-adjusting brushroll.
- • **Effortless Clean & Empty:** Auto-empty base seals away dust—no mess, no hassle.
- • **Pet Hair’s Worst Enemy:** Self-cleaning brushroll and pet tools tackle even the toughest fur.
- • **Allergen-Free Air Quality:** HEPA filter traps 99.97% of dust & allergens for a healthier home.
- • **Light as Air Maneuverability:** 30% lighter than previous models for easy, all-day use.

## Overview

The Shark Clean & Empty Cordless Stick Vacuum BU3521 revolutionizes home cleaning with its lightweight design, 40-minute cordless runtime, and an innovative auto-empty base that seals away dust and allergens. Featuring HEPA filtration and an auto-adjusting brushroll, it delivers deep cleaning on carpets and hard floors while effortlessly handling pet hair. Perfect for busy professionals seeking a sleek, hygienic, and low-maintenance vacuum solution.

## Description

Meet the new Shark Clean & Empty Cordless Stick Vacuum Cleaner & Auto-Empty System. Clean & Empty features a redesigned 1.3L auto-empty base and a lightweight design for versatile cleaning. With the auto-empty system, cleaning convenience is optimized; Always Charged, Always Empty & ready for the next clean. Inside the base, fine dust and debris is captured after every clean, leaving them out of the air you breathe- Up to 500x less dust exposure*. (*Based on third party-plume testing while emptying vs. Shark Navigator upright manual empty US/CAN NV130.) Clean & Empty has up to 40 minutes of runtime* (*in ECO mode, measured at the hand vacuum) with nozzle technology to auto-adjust to floor type, optimizing brushroll speed for deep carpet cleaning. The Powerfins multi-surface brushroll gives you continuous cleaning contact to dig deep into carpets & directly engage hard floors with self-cleaning brushroll technology allowing for no hair wrap.

Review: Fantastic at sucking up pet hair from carpets! - I've had this vacuum 3 months now and I'm really impressed. I've had Shark vacuums for years now and I usually get their pet, upright vacuums. When my last one died I was looking for similar and wasn't finding a "pet" one at the time, but this kept popping up and seemed the closest. I really was not sold on the auto-emptying station and thought that was unnecessary...but after 3 months of daily use, I love it. Is it needed? No. But does it make life a little easier - yup! I was the worst about finishing up vacuuming and not emptying the vacuum and having to empty it mid vacuum the next time, but this handles that problem and I really love that about it. I do have to remember to empty the bin on the base, but I usually remember before it's too full (usually, not always). I bought an extra set of filters for the vacuum and base and find that so far they need to be swapped out/cleaned about every 1.5 months (as i'm coming up to my next swap out). As for the way it works on pet hair - AMAZING! In our household we have 3 long hair cats, 2 golden retrievers and a goldendoodle that sheds worse than both goldens combined. It's the best vacuum for pet hair i've tried yet. I was really shocked that it got the dog hair off the carpet and backdoor rug that does not like to give up the hair no matter what i've tried. I use to vacuum my living area rug and then take one of those pet hair rakes to it to get the hair off, but this vacuum picks up all the visible hair so I haven't even felt the need to do the pet rake. It has 3 modes and I find I use the eco mode the most. The mid-range mode has so much suction it sucks up my smaller area rugs and the rollers stop working, so I just use eco mode on those and they are low/no pile so it works really well. When I get to the living room area rug it's considered a low pile (but plush) and I use the mid-range mode that auto speeds up the brush, and it picks up the pet hair great. On my backdoor mat that is one of those heavy duty get-the-water-and-mud-off rugs from HD, I use mode 3 and that gets it all off in a few swipes. Things I wish they would change on future models: I wish it just started on eco mode and not the mid-range mode. Or at the very least started where you left off the last use. I wish there was a way to boost the suction while on eco mode like my last Shark did. That little trigger boost was really handy. Battery life is good. Suction is great. It's just really a fantastic vacuum and i'm very happy with my purchase and will hopefully have it for many years like my pervious Sharks.
Review: You are going to LOVE this vacuum! Life Changing ... - While this may not be the right tool to use to clean up a box of Captin Crunch that has spilled off the counter all over your kitchen floor, this vacuum is life changing in every other way. Incredibly easy assembly; the head of the vacuum is the perfect size and flexibility to get in, around and under EVERYTHING. It picks up dust, pet hair, dirt, every little particle along the base boards and into the corners. When you're done you can SEE the difference and it is equally wonderful on tile, wood, carpet and rugs. The assembly plugs into a standard outlet so the unit is contantly charged and so light and easy to grab. I am DONE with heavy, awkward vacuums, clumsy cords and wasting time house cleaning with little visible difference. I LOVE the attachments that come with the unit and the empty system that keeps everything clean, neat and out of my way. Back to the Captain Crunch. It doesn't pick up large pieces of debris .. No worries - for that I use a broom and a waste bin, THEN the Shark Clean and Empty to make my kitchen perfect again.

## Features

- AUTOMATICALLY CHARGES & EMPTIES AFTER EVERY CLEAN: Return the vac to its charging dock, where it automatically empties into the base. After every clean: no more dirt on your hands, no more dust clouds in your home, no more cleaning after you clean.
- LIGHTWEIGHT MANEUVERABILITY: The redesigned cordless vacuum is 30% lighter vs. Shark Vertex Pro.
- REMOVABLE HANDVAC: Transforms into handheld vacuum for lightweight above floor cleaning.
- UP TO 40 MINUTES OF RUNTIME*: Deep clean your whole home with up to 40 minutes* of runtime. (*In ECO mode, measured at the hand vacuum.)
- UP TO 500X LESS DUST EXPOSURE** VS. TRADITIONAL EMPTYING: Fine dust and debris get sealed away after every clean, keeping them out of the air you breathe-- no more dust clouds. (*Based on third party-plume testing while emptying vs. Shark Navigator upright manual empty US/CAN NV130.)
- HEPA FILTRATION AND ANTI-ALLERGEN COMPLETE SEAL: Captures and traps over 99.97%* of dust and allergens. (*Based on ASTMF1977, down to .3 microns. Allergens refers to non-living matter.)
- AUTO-ADJUSTS TO FLOOR TYPES: Auto-adjusting & Multi- surface brushroll, optimizes brushroll speed for deep carpet cleaning and directly engages hard floors.
- QUIET MODE: Provides the option to dock & charge silently, and leave the emptying for later.
- LED HEADLIGHTS: Powerful LED lights on the nozzle reveal hidden debris around your home.
- 8" Duster Crevice Tool, Pet-Multi tool, Removable DC-Jack Battery Pack (spare battery packs and charging cords sold separately)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D15YWYMD |
| Amperage | 25 Amps |
| Batteries | 1 Lithium Ion batteries required. (included) |
| Batteries required | Yes |
| Battery Description | Lithium-Ion |
| Battery Life | 40 minutes |
| Battery type | Lithium-Ion |
| Best Sellers Rank | #29,707 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #88 in Stick Vacuums & Electric Brooms |
| Brand | Shark |
| Capacity | 1.3 Liters |
| Charging Time | 5 Hours |
| Color | White |
| Control Method | Touch |
| Controller Type | Push Button |
| Customer Reviews | 4.1 4.1 out of 5 stars (1,763) |
| Filter Type | HEPA Filter |
| Finish Type | Polished |
| Finish types | Polished |
| Form Factor | Handheld, Stick |
| Global Trade Identification Number | 10622356647462 |
| Included Components | Auto-Empty Base, Cordless Vacuum, Crevice Tool, Pet Multi-Tool |
| Indoor/Outdoor Usage | Indoor |
| Is Cordless? | Yes |
| Item Weight | 11.24 pounds |
| Item model number | BU3521 |
| Manufacture Year | 2024 |
| Manufacturer | SharkNinja |
| Maximum Horsepower | 0.32 Horsepower |
| Model Name | Clean & Empty |
| Motor Horsepower | 0.32 horsepower |
| Number of Items | 1 |
| Number of Power Levels | 3 |
| Number of Speeds | 3 |
| Portable | Yes |
| Product Dimensions | 14.69"L x 10.43"W x 43.5"H |
| Recommended Uses For Product | Carpet, Floor |
| Special Feature | Cordless, HEPA, High Precision Sensors, Lightweight, Spotless Cleaning |
| Style | Clean & Empty (Basic) |
| UPC | 622356647465 622356309783 |
| Vacuum Collection Technology | Rotating Brush Roll, Auto-Empty System |
| Wattage | 180 watts |

## Product Details

- **Brand:** Shark
- **Filter Type:** HEPA Filter
- **Power Source:** Battery Powered
- **Special Feature:** Cordless, HEPA, High Precision Sensors, Lightweight, Spotless Cleaning
- **Surface Recommendation:** All floors

## Images

![Shark Clean & Empty Cordless Stick Vacuum – Lightweight Cordless with HEPA Filter, Portable, Rechargeable, Auto-Empty System, Stick Vacuum for Pet Hair, Carpets & Hardfloor, White, BU3521 - Image 1](https://m.media-amazon.com/images/I/71lhbB4HHrL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fantastic at sucking up pet hair from carpets!
*by C***A on August 10, 2025*

I've had this vacuum 3 months now and I'm really impressed. I've had Shark vacuums for years now and I usually get their pet, upright vacuums. When my last one died I was looking for similar and wasn't finding a "pet" one at the time, but this kept popping up and seemed the closest. I really was not sold on the auto-emptying station and thought that was unnecessary...but after 3 months of daily use, I love it. Is it needed? No. But does it make life a little easier - yup! I was the worst about finishing up vacuuming and not emptying the vacuum and having to empty it mid vacuum the next time, but this handles that problem and I really love that about it. I do have to remember to empty the bin on the base, but I usually remember before it's too full (usually, not always). I bought an extra set of filters for the vacuum and base and find that so far they need to be swapped out/cleaned about every 1.5 months (as i'm coming up to my next swap out). As for the way it works on pet hair - AMAZING! In our household we have 3 long hair cats, 2 golden retrievers and a goldendoodle that sheds worse than both goldens combined. It's the best vacuum for pet hair i've tried yet. I was really shocked that it got the dog hair off the carpet and backdoor rug that does not like to give up the hair no matter what i've tried. I use to vacuum my living area rug and then take one of those pet hair rakes to it to get the hair off, but this vacuum picks up all the visible hair so I haven't even felt the need to do the pet rake. It has 3 modes and I find I use the eco mode the most. The mid-range mode has so much suction it sucks up my smaller area rugs and the rollers stop working, so I just use eco mode on those and they are low/no pile so it works really well. When I get to the living room area rug it's considered a low pile (but plush) and I use the mid-range mode that auto speeds up the brush, and it picks up the pet hair great. On my backdoor mat that is one of those heavy duty get-the-water-and-mud-off rugs from HD, I use mode 3 and that gets it all off in a few swipes. Things I wish they would change on future models: I wish it just started on eco mode and not the mid-range mode. Or at the very least started where you left off the last use. I wish there was a way to boost the suction while on eco mode like my last Shark did. That little trigger boost was really handy. Battery life is good. Suction is great. It's just really a fantastic vacuum and i'm very happy with my purchase and will hopefully have it for many years like my pervious Sharks.

### ⭐⭐⭐⭐⭐ You are going to LOVE this vacuum! Life Changing ...
*by F***S on January 21, 2026*

While this may not be the right tool to use to clean up a box of Captin Crunch that has spilled off the counter all over your kitchen floor, this vacuum is life changing in every other way. Incredibly easy assembly; the head of the vacuum is the perfect size and flexibility to get in, around and under EVERYTHING. It picks up dust, pet hair, dirt, every little particle along the base boards and into the corners. When you're done you can SEE the difference and it is equally wonderful on tile, wood, carpet and rugs. The assembly plugs into a standard outlet so the unit is contantly charged and so light and easy to grab. I am DONE with heavy, awkward vacuums, clumsy cords and wasting time house cleaning with little visible difference. I LOVE the attachments that come with the unit and the empty system that keeps everything clean, neat and out of my way. Back to the Captain Crunch. It doesn't pick up large pieces of debris .. No worries - for that I use a broom and a waste bin, THEN the Shark Clean and Empty to make my kitchen perfect again.

### ⭐⭐⭐⭐⭐ Cordless Cleaning Made Simple!
*by A***O on January 20, 2026*

This Shark cordless vacuum is fantastic! It’s sleek, lightweight, and so easy to use. I can clean my entire house on a single charge, and it picks up dirt effortlessly from all floor types. Cleanup is a breeze, too. I especially love how convenient it is you can just grab it, clean, and go without having to plug anything in. Highly recommend for anyone who wants a quick, efficient, and cordless cleaning solution! Definitely worth every penny!

## Frequently Bought Together

- Shark Clean & Empty Cordless Stick Vacuum – Lightweight Cordless Vacuum with HEPA Filter, Portable, Rechargeable, Auto-Empty System, Stick Vacuum for Pet Hair, Carpets & Hardfloor, White, BU3521
- 4 Pack IW3511 BU3521 HEPA Filter Replacement Part For Shark IW3511 IW1111 IW1120 Detect Pro Lightweight Cordless Stick Vacuum Cleaner. For Shark BU3523 Clean Empty Auto-Empty System Portable Handheld.

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-17*