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Shark Clean & Empty Cordless (BU3521)
Shark

Clean & Empty Cordless (BU3521)

The cheapest route to a Shark dock.

Stick & Cordless Vacuums
—/10What the pros sayPendingExpert consensusSee score breakdown ↓
Buying call

The BU3521 pairs a 40-minute stick with a Clean & Empty base that has an Anti-Allergen Complete Seal. The set weighs 7.55 kg, and Shark does not list a cup size.

Full verdict ↓
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Real-world useBased on everyday testing, not a spec sheet
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Clean & Empty Cordless (BU3521)Check priceSee price
Key specs
Runtime
40 min
Price & availability

Where to buy

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Buying decision

Should you buy it?

The BU3521 pairs a 40-minute stick with a Clean & Empty base that has an Anti-Allergen Complete Seal. The set weighs 7.55 kg, and Shark does not list a cup size.

Best for

Docked convenience at a lower tier

Not for

Large homes

Main strengthAuto-empty base
Main weakness40-minute runtime
Reasons to buy
Auto-empty base
Anti-Allergen Complete Seal
Five-year warranty
Reasons to avoid
40-minute runtime
No sensors
Cup size not published
Measured view—/10What the pros say.
Head to head

How it stacks up

Open a comparison for the full side-by-side view.

Choose a gadget
Shark Clean & Empty Cordless (BU3521)
This deviceClean & Empty Cordless (BU3521)
VS
Shark Pet Cordless Stick (IX141)
AlternativeShark Pet Cordless Stick (IX141)
Score
——
Full comparison
Shark Clean & Empty Cordless (BU3521)
This deviceClean & Empty Cordless (BU3521)
VS
Shark Pet Cordless (IY143H)
AlternativeShark Pet Cordless (IY143H)
Score
——
Full comparison
Shark Clean & Empty Cordless (BU3521)
This deviceClean & Empty Cordless (BU3521)
VS
Shark PowerLite (BU1621)
AlternativeShark PowerLite (BU1621)
Score
——
Full comparison
Same category

Alternatives worth a look

Other phones in the database, with their stored scores and prices.

All stick & cordless vacuums →
Pet Cordless Stick (IX141)—
SharkPet Cordless Stick (IX141)
Pet Cordless (IY143H)—
SharkPet Cordless (IY143H)A pet stick with a quick charge.
PowerLite (BU1621)—
SharkPowerLite (BU1621)Shark's lightest current stick.
PowerPro Pet (IZ373H)—
SharkPowerPro Pet (IZ373H)Shark's pet stick without the extras.
Product data

Full specifications

14 attributes, grouped for quick scanning. Spot a wrong value? Hit the next to it.

Weight with dock
7.55 kg
Runtime Min
40 min
Wet/dry
dry
Cleaning path
10.39 in (26.4 cm)
LED headlight
Yes
Auto-empty base
yes (Clean & Empty base)
Warranty
5 years
Type
stick
Batteries included
1
Width
10.35 in (26.3 cm)
Depth
14.33 in (36.4 cm)
Height
28.86 in (73.3 cm)
Anti Tangle
Yes
Power
240 W
Vote & discuss

Community says

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Clean & Empty Cordless (BU3521)No store price yetSpecs