• Shark Clean & Empty Stick Vacuum BU3521

    $535
    $214.99 (29%) off RRP of $750
    $214.99 (29%) off RRP of $750

    Shark Clean & Empty Stick Vacuum BU3521

    $535
    $214.99 (29%) off RRP of $750
    $214.99 (29%) off RRP of $750
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    • Overview
    • Specifications & manuals
    • Reviews
    • Legendary service
    • Delivery, services & returns
    • Questions & answers

    Overview

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    The Shark Clean & Empty Cordless Stick Vacuum BU3521 delivers effortless cleaning with its ultra-lightweight design, powerful suction, and hands-free auto-emptying system. Designed for convenience, it automatically empties dust and debris into its 1.3L base while charging, ensuring it’s always ready for the next clean. Experience HyperVelocity suction power, designed to tackle dirt on both carpets and hard floors. The Auto-Adjusting MultiSurface brushroll optimizes speed for deep carpet cleaning while engaging directly with hard floors for a thorough clean. With up to 40 minutes of runtime, you can deep clean your home without interruptions. The vacuum easily transforms into a handheld cleaner, making it perfect for above-floor surfaces, upholstery, and tight spaces. HEPA filtration with Anti-Allergen Complete Seal captures and traps 99.97% of dust and allergens, ideal for allergy sufferers. LED headlights illuminate hidden debris, and Quiet Mode allows silent charging, so you can empty the bin at your convenience.
    Auto-Empty & Always Charged

    The 1.3L auto-empty base eliminates manual emptying by automatically collecting debris while the vacuum charges. Always ready for the next use, it provides a hassle-free cleaning experience with no interruptions or messy bin handling.

    HyperVelocity Suction Power

    Designed for deep cleaning, HyperVelocity suction delivers powerful airflow to lift dirt, dust, and pet hair from carpets and hard floors. Enjoy superior debris pickup with consistent, high-speed suction for a thorough and effortless clean every time.

    Transforms into a Handheld Vacuum

    Quickly converts into a lightweight handheld vacuum for effortless cleaning of stairs, upholstery, and tight spaces. Perfect for above-floor surfaces and car interiors, it provides versatile, on-the-go cleaning without the bulk of a full-sized vacuum.

    HEPA Filtration & Anti-Allergen Complete Seal

    The HEPA filtration system, combined with an Anti-Allergen Complete Seal, captures and traps 99.97% of dust, dander, and allergens. This ensures cleaner air, reducing airborne irritants and creating a healthier home environment for allergy sufferers and pet owners alike.

    Specifications & manuals

    key Specifications
    Brand
    Shark
    Finish Colour
    White
    Finish Colour Description
    White & Navy Finish
    Height (mm)
    1100 mm
    Width (mm)
    265 mm
    Depth (mm)
    140 mm
    Model Number
    BU3521
    Vacuum Type
    Stick
    Vacuum Bag Type
    Bagless
    Weight (kg)
    2.7 kg
    Power (W)
    180 W
    Accessories included

    1x Shark®Clean & Empty
    1x 8” Duster Crevice Tool
    1x Pet Multi Tool
    1x Auto EmptyCharging Dock

    warranty
    Manufacturer Warranty
    2 Years
    Use
    Not intended or designed for commercial use.
    additional Dimensions
    Package Dimensions (H x W x D)
    715 x 355 x 257
    Package Weight (kg)
    5.46
    functions
    Pet Hair
    Tiles and Carpets
    Hard Floors
    other Features
    Features
    Auto-Empty & Always Charged: The 1.3L base automatically empties debris and charges the vacuum while docked, eliminating manual emptying and ensuring it's always ready for the next clean.

    Hyper Velocity Suction for Deep Cleaning: Advanced suction technology delivers powerful debris pickup on both carpets and hard floors, tackling dirt, dust, and pet hair with ease.

    Auto-Adjusting Multi Surface Brush roll: Automatically adapts brush speed to different floor types, providing deep cleaning for carpets while directly engaging hard floors for a thorough clean.

    Up to 40 Minutes of Runtime: Long-lasting battery power allows for uninterrupted whole-home cleaning, giving you more time to focus on what matters.

    Transforms into a Handheld Vacuum: Easily converts into a lightweight handheld vacuum, making it perfect for stairs, upholstery, car interiors, and above-floor surfaces.

    HEPA Filtration & Anti-Allergen Complete Seal: Traps 99.97% of dust and allergens, improving indoor air quality and making it an excellent choice for allergy sufferers.

    Quiet Mode for Discreet Operation: Enables silent docking and charging, allowing you to postpone emptying the dustbin without disrupting your home.

    LED Headlights for Spotless Cleaning: Bright LED lights on the nozzle illuminate hidden debris, ensuring no dust or dirt is left behind.
    electrical Connection
    Length of cord
    1.2 m
    country of Origin
    Origin
    China

    Reviews

    Rating snapshot

    5
    281
    4
    50
    3
    18
    2
    22
    1
    25

    Average customer rating

    Overall
    4.4
    Ease of setup
    5.0
    Build quality
    5.0

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    What customers say
    Generated by BazaarVoice HarmonyAI using customers reviews

    The cordless vacuum cleaner offers strong suction power and effectively cleans various floor types, including carpets and hard floors. Customers praise its lightweight and maneuverable design, as well as the convenient auto-empty docking station. However, some users note drawbacks such as limited battery life, small dust bin capacity, and occasional suction power issues over time. The vacuum is also reported to be a bit noisy, and some users had difficulty accessing tight spaces. Overall, the product provides a good balance of performance and convenience for most customers.

    Pros
    Cons
    1-3 of 400 reviews
    Mick2025-11-30
    Glad I bought it
    All in all a great vacuum. Light, easy to manoeuvre and cleans really close to the edge. Slides under most furniture with ease and picks up brilliantly. The only negative is the battery doesn't last long enough to really go to town across the whole house. The charging station is ideal. The self empty is brilliant, even if it did make me jump the first time. I'm really happy with it overall.
    Carol2025-11-29
    Love it
    Love my new Shark hoover, it's lighter but hoovers great. Especially not having to change the settings for different flooring. Love that it also empty's itself
    The best2025-11-29
    The best thing
    [This review was collected as part of a promotion.] Very useful, it helps it’s so light to use I like how it sucks all the dust in the bin

    Legendary service

    The Appliances Online Net Promoter Score (NPS) is based on feedback from 89,897 people, collected between August 2024 to August 2025. Learn more about the Net Promoter Score (NPS).
    Delivery people are excellent
    Marilyn, Mackenzie, QLD
    FANTASTIC SERVICE
    Kenneth Eather, PORT MACQUARIE
    The best online service I have experienced
    Nicole, Hawthorn East, VIC

    Delivery, services & returns

    Appliances Online is all about legendary service. We offer free next business day delivery, free connection, free removal and free recycling, and we even offer Saturday delivery and, in some locations, a Premium Delivery option that allows you to choose your own 2-hour delivery window.

    Questions & answers

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