DuoFlex HX1 Extra vs BU3521UK Cordless Vacuums

Torn between DuoFlex HX1 Extra and BU3521UK for your next cordless vacuum?

We examine the DuoFlex HX1 Extra – a battery-power vacuum by Miele, comparing runtime, dust tank, and costs, with – BU3521UK by Shark, analysing real-world vacuuming performance.

By assessing these vacuums – the DuoFlex HX1 Extra and BU3521UK from MIELE and SHARK, you get the best floorcare machine.

Best Cordless Vacuum Pick

MIELE DuoFlex HX1 Extra vs SHARK BU3521UK – key Specifications

DuoFlex HX1 Extra and BU3521UK Cordless Battery Run Time

MIELE Stick cordless vacuums, like the DuoFlex HX1 Extra, provides lightweight portability without mains cables. BU3521UK Stick is also cordlessly powered by a SHARK rechargeable battery.

The Shark BU3521UK has a battery supply runtime of 40 minutes of cleaning, compared to the Miele DuoFlex HX1 Extra which has 55 minutes life.

• MIELE DuoFlex HX1 Extra Runtime: 55 mins continuous vacuuming
• SHARK BU3521UK Runtime: 40 mins continuous vacuuming

Charging times between the DuoFlex HX1 Extra and BU3521UK varies – check manual.

Cordless Vacuum Dust Tank Capacity

Both Miele DuoFlex HX1 Extra and Shark BU3521UK are bagless, storing dust, hairs, dirt, and debris inside a sealed 0.3 litre and 0.42 litre tank, respectively. The BU3521UK by SHARK holds up to 0.42 Litre of compressed dirty particles. The DuoFlex HX1 Extra by MIELE has a capable capacity of 0.3 litre for manual disposable.

• DuoFlex HX1 Extra onboard dirt/dust tank size: 0.3L
• BU3521UK onboard dirt/dust tank size: 0.42L

Floor Cleaning Types

Miele’s DuoFlex HX1 Extra and Shark’s BU3521UK brush heads are effective on every surface – carpets & deep-pile rugs, hard floors (laminate, wood, tiles), vinyl, even upholstery, and stairs.

Their only limitation is the BU3521UK and DuoFlex HX1 Extra can’t vacuum liquids. For this, a SHARK or MIELE ‘wet and dry’ vacuum is needed.

Most Miele and Shark battery powered vacuums include accessories. Check DuoFlex HX1 Extra or BU3521UK manual for specifications and attachments.

Vacuum Filtration

The BU3521UK and MIELE DuoFlex HX1 Extra include effective filters to capture dust, dander, pollen, hairs, and fibres.

MIELE and SHARK use HEPA, foam, or cloth, filters. DuoFlex HX1 Extra and BU3521UK maintain suction and clean exhaust air.

SHARK and MIELE Reviews

Combined feedback from 31 reviewers shows the DuoFlex HX1 Extra with a rating of 4.8/5 stars, and the BU3521UK vacuum gains a 4.4/5 average from 128 reviews, showing comparable reliability results.

Brand	Model	Runtime	Weight	Tank	Best Price
MIELE	DuoFlex HX1 Extra	55 M	3.1	0.3L	£299.00
SHARK	BU3521UK	40 M	2.7	0.42L	£349.99