{"product_id":"clean-empty-cordless-vacuum-with-auto-empty-system-bu3521uk","title":"Clean \u0026 Empty Cordless Vacuum with Auto-Empty System | BU3521UK","description":"\u003ch3\u003eCordless Cleaning That Empties Itself\u003c\/h3\u003e\n\u003cp\u003eTake one of the most annoying jobs out of cordless vacuuming with the \u003cstrong\u003eShark Clean \u0026amp; Empty Cordless Vacuum BU3521UK\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eOnce you've finished cleaning, simply return the vacuum to its dock. Shark's \u003cstrong\u003eAuto-Empty System automatically removes the collected dirt and debris from the vacuum's dust cup\u003c\/strong\u003e, transferring it into the larger sealed base.\u003c\/p\u003e\n\u003cp\u003eThe base can hold \u003cstrong\u003eup to 30 days of dirt and debris\u003c\/strong\u003e, meaning you don't have to manually empty the vacuum after every clean. \u003c\/p\u003e\n\u003cp\u003eFor busy households, pet owners or anyone who simply wants a lower-maintenance cordless vacuum, it's a very useful upgrade over a conventional stick cleaner.\u003c\/p\u003e\n\u003ch3\u003eAutomatically Empties After Every Clean\u003c\/h3\u003e\n\u003cp\u003eThe main reason to choose the BU3521UK is convenience.\u003c\/p\u003e\n\u003cp\u003eReturn the vacuum to its Auto-Empty dock after cleaning and the system automatically transfers debris from the handheld dust cup into the \u003cstrong\u003e1.3L bagless base\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eInstead of carrying a full dust cup to the bin after every cleaning session, you can simply dock the vacuum and let the system take care of it. \u003c\/p\u003e\n\u003ch3\u003eHolds Up to 30 Days of Dirt \u0026amp; Debris\u003c\/h3\u003e\n\u003cp\u003eThe larger Auto-Empty base is designed to hold \u003cstrong\u003eup to 30 days' worth of collected dirt and debris\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThat makes the Shark Clean \u0026amp; Empty particularly appealing if you vacuum frequently but don't want the hassle of constantly emptying a small cordless dust container. \u003c\/p\u003e\n\u003ch3\u003eSeals Away Dust \u0026amp; Allergens\u003c\/h3\u003e\n\u003cp\u003eEmptying a conventional vacuum can send fine dust back into the air.\u003c\/p\u003e\n\u003cp\u003eShark's Auto-Empty base features an \u003cstrong\u003eAnti-Allergen Complete Seal\u003c\/strong\u003e, designed to capture and trap up to \u003cstrong\u003e99.9% of dust, allergens and irritants\u003c\/strong\u003e inside the base. \u003c\/p\u003e\n\u003cp\u003eIt's another reason the self-emptying system is about more than convenience — it also reduces the need to handle collected dust directly.\u003c\/p\u003e\n\u003ch3\u003eFloorDetect Technology\u003c\/h3\u003e\n\u003cp\u003eMove from hard flooring to carpet without constantly changing settings.\u003c\/p\u003e\n\u003cp\u003eThe BU3521UK uses \u003cstrong\u003eFloorDetect technology\u003c\/strong\u003e, allowing the brush-roll to respond to changes in floor surface and automatically optimise cleaning as you move around your home. \u003c\/p\u003e\n\u003ch3\u003eAnti Hair Wrap Plus\u003c\/h3\u003e\n\u003cp\u003eLong hair and pet hair can quickly become tangled around a conventional vacuum brush-roll.\u003c\/p\u003e\n\u003cp\u003eShark's \u003cstrong\u003eAnti Hair Wrap Plus technology\u003c\/strong\u003e actively separates and removes long, short and pet hair from the brush-roll as you clean, helping reduce tangles and maintenance. \u003c\/p\u003e\n\u003cp\u003eThat makes the BU3521UK particularly useful in homes with pets or family members with long hair.\u003c\/p\u003e\n\u003ch3\u003eUp to 40 Minutes Runtime\u003c\/h3\u003e\n\u003cp\u003eEnjoy up to \u003cstrong\u003e40 minutes of cordless cleaning\u003c\/strong\u003e from the rechargeable battery, giving you the freedom to move around your home without switching plug sockets or dragging a cable behind you. \u003c\/p\u003e\n\u003cp\u003eOnce you're finished, returning the vacuum to its Auto-Empty dock also begins the charging process, so it's ready for your next clean. \u003c\/p\u003e\n\u003ch3\u003eLightweight \u0026amp; Manoeuvrable\u003c\/h3\u003e\n\u003cp\u003eAt approximately \u003cstrong\u003e2.7kg\u003c\/strong\u003e, the vacuum itself is designed to remain lightweight and easy to manoeuvre.\u003c\/p\u003e\n\u003cp\u003eShark states that it's \u003cstrong\u003e30% lighter than the IZ300UK\u003c\/strong\u003e, helping make everyday floor cleaning, stairs and above-floor jobs easier to manage. \u003c\/p\u003e\n\u003ch3\u003ePerfect for Pet-Friendly Homes\u003c\/h3\u003e\n\u003cp\u003eThe BU3521UK also includes a \u003cstrong\u003ePet Multi-Tool\u003c\/strong\u003e, allowing you to move beyond floor cleaning and tackle embedded pet hair on furniture and upholstery.\u003c\/p\u003e\n\u003cp\u003eCombined with Anti Hair Wrap Plus and the sealed Auto-Empty system, that makes this model particularly well suited to homes with cats and dogs. \u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHands-free \u003cstrong\u003eAuto-Empty System\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBase holds up to \u003cstrong\u003e30 days of dirt and debris\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eLarge \u003cstrong\u003e1.3L Auto-Empty base\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eUp to \u003cstrong\u003e40 minutes runtime\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFloorDetect\u003c\/strong\u003e automatic floor adjustment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnti Hair Wrap Plus\u003c\/strong\u003e technology\u003c\/li\u003e\n\u003cli\u003ePowerFins floorhead\u003c\/li\u003e\n\u003cli\u003eAnti-Allergen Complete Seal\u003c\/li\u003e\n\u003cli\u003eCaptures and traps up to \u003cstrong\u003e99.9% of dust and allergens\u003c\/strong\u003e in the base\u003c\/li\u003e\n\u003cli\u003eAutomatically charges when docked\u003c\/li\u003e\n\u003cli\u003eQuiet Mode allows charging without automatic emptying\u003c\/li\u003e\n\u003cli\u003eSuitable for carpets and hard floors\u003c\/li\u003e\n\u003cli\u003ePet Multi-Tool included\u003c\/li\u003e\n\u003cli\u003eDuster Crevice Tool included\u003c\/li\u003e\n\u003cli\u003eApprox. \u003cstrong\u003e2.7kg vacuum weight\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e5-year Shark guarantee when registered; 2 years for the battery \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho Is the Shark BU3521UK Best For?\u003c\/h2\u003e\n\u003cp\u003eI'd position this as an excellent choice for someone who wants \u003cstrong\u003ecordless convenience with less maintenance\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eIt's particularly appealing for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBusy households that vacuum frequently\u003c\/li\u003e\n\u003cli\u003ePet owners dealing with regular hair and fur\u003c\/li\u003e\n\u003cli\u003ePeople who dislike manually emptying a cordless vacuum after every use\u003c\/li\u003e\n\u003cli\u003eHomes with a mixture of carpets and hard floors\u003c\/li\u003e\n\u003cli\u003eAnyone who wants their vacuum stored, charged and emptied in one place\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou're not primarily paying for dramatically longer runtime or a huge specification number here. \u003cstrong\u003eYou're paying for convenience.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThat's what distinguishes this model from something like the Dreame R20 we just did.\u003c\/p\u003e\n\u003ch2\u003eWhat's in the Box?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eShark BU3521UK cordless vacuum main unit\u003c\/li\u003e\n\u003cli\u003eRechargeable battery\u003c\/li\u003e\n\u003cli\u003eAuto-Empty dust cup\u003c\/li\u003e\n\u003cli\u003eStraight wand with storage clip\u003c\/li\u003e\n\u003cli\u003eCompact PowerFins floor nozzle with FloorDetect\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e1.3L Auto-Empty dock\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e8\" Duster Crevice Tool\u003c\/li\u003e\n\u003cli\u003ePet Multi-Tool \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eShark BU3521UK\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eCordless Stick Vacuum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAuto Empty\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAuto-Empty Base\u003c\/td\u003e\n\u003ctd\u003e1.3L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDirt Storage\u003c\/td\u003e\n\u003ctd\u003eUp to 30 days\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Runtime\u003c\/td\u003e\n\u003ctd\u003eUp to 40 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVacuum Dust Cup\u003c\/td\u003e\n\u003ctd\u003e0.42L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharging Time\u003c\/td\u003e\n\u003ctd\u003eApprox. 4.5 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFloor Detection\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnti Hair Wrap Plus\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePet Tool\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVacuum Weight\u003c\/td\u003e\n\u003ctd\u003eApprox. 2.7kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eWhite \/ Blue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003e5 years*\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Guarantee\u003c\/td\u003e\n\u003ctd\u003e2 years*\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e*Subject to Shark registration and applicable UK\/ROI guarantee terms. \u003c\/p\u003e","brand":"Shark","offers":[{"title":"Default Title","offer_id":51245537821005,"sku":"BU3521UK","price":409.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0267\/9501\/6391\/files\/BU3521UKa.png?v=1741883983","url":"https:\/\/redmondelectric.ie\/products\/clean-empty-cordless-vacuum-with-auto-empty-system-bu3521uk","provider":"Redmond Electric","version":"1.0","type":"link"}