Kärcher SE 4001 Review | 43 Data compared

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  • Avg. price: ~£260
  • Suction pressure: 21 kPa
  • Capacity: 18 L
  • Power: 1,400 W
  • Noise level: 74 dB
  • Weight: 7.8 kg

Kärcher SE 4001 review. Compare 43 technical specifications and user reviews to see how this product ranks in the Wet-Dry Vacuums category and whether it is worth buying.

7.6

Overall score

What it is: An overall evaluation of products in the Wet-Dry Vacuums category, based on technical analysis and user reviews.

When it matters: When you need a quick reference for identifying the best products in the Wet-Dry Vacuums category.

Score components:

80.0%

7.3

Technical Score

20.0%

9.0

User score

Very good
7.3

Technical Score

What it is: An assessment of technical performance for products in the Wet-Dry Vacuums category across these key areas: Performance, Battery, Design & Mobility, Filter & Accessories.

When it matters: When you want to compare products in the Wet-Dry Vacuums category by technical performance, specifications, and available features.

Score components:

40.0%

7.4

Performance

22.0%

6.4

Design & Mobility

20.0%

8.7

Filter & Accessories

18.0%

6.5

Battery

Very good
9.0

User score

What it is: A rating that combines user reviews with the total review volume for products in the Wet-Dry Vacuums category.

When it matters: When you want to know how products in the Wet-Dry Vacuums category perform in everyday use and how reliable owners find them over time.

Score components:

70.0%

8.6

User reviews

30.0%

10

Popularity

User score:
United Kingdom
amazon
4.3
(5090)

(Reviews last updated: August 2026)

Exceptional
  • 6.4
    Car cleaning

    Score components:

    30.0%

    5.4

    Weight

    25.0%

    4.0

    Cordless

    25.0%

    8.7

    Suction pressure

    20.0%

    8.2

    Noise level

  • 7.3
    Workshop & garage

    Score components:

    30.0%

    10

    Rated motor power

    25.0%

    6.3

    Capacity

    25.0%

    4.0

    Power tool socket

    20.0%

    8.7

    Suction pressure

  • 8.0
    Professional use

    Score components:

    30.0%

    10

    Rated motor power

    30.0%

    8.7

    Suction pressure

    25.0%

    6.3

    Capacity

    15.0%

    5.4

    Weight

  • karcher-se-4001
  • karcher-se-4001
  • karcher-se-4001
karcher-se-4001
karcher-se-4001
karcher-se-4001

Best prices in UK

Best rankings

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Available: ranking among products currently available (including other versions of this product).
All: ranking among all products in the database.

Verdict

The Kärcher SE 4001 is a versatile 3-in-1 spray extraction and wet-dry vacuum cleaner powered by a robust 1400-watt motor that delivers a 70 l/s airflow and 210 mbar suction pressure. It features a dual-tank system comprising a removable 4-liter fresh water tank and a 4-liter dirty water container, alongside a 230 mm working width, a 7.5-meter power cable, and a lightweight design weighing 7.8 kg without accessories. Key advantages include its proprietary nozzle technology that ensures 50% faster drying times for textile surfaces, a convenient 3-in-1 carrying handle for seamless emptying, and integrated storage for its multiple specialized nozzles. However, notable drawbacks include a high noise level of 74 dB(A), the lack of an integrated motorized brush for deep carpet agitation, and an upholstery spray-extraction nozzle that must be purchased separately.

Technical Specifications of wet-dry vacuum Kärcher SE 4001

Technical Score

What it is: An assessment of technical performance for products in the Wet-Dry Vacuums category across these key areas: Performance, Battery, Design & Mobility, Filter & Accessories.

When it matters: When you want to compare products in the Wet-Dry Vacuums category by technical performance, specifications, and available features.

Score components:

40.0%

7.4

Performance

22.0%

6.4

Design & Mobility

20.0%

8.7

Filter & Accessories

18.0%

6.5

Battery

7.3
Kärcher SE 4001 has a technical score of 7.26 points, which is higher than 65.8% of products in this category.
User score

What it is: A rating that combines user reviews with the total review volume for products in the Wet-Dry Vacuums category.

When it matters: When you want to know how products in the Wet-Dry Vacuums category perform in everyday use and how reliable owners find them over time.

Score components:

70.0%

8.6

User reviews

30.0%

10

Popularity

User score:
United Kingdom
amazon
4.3
(5090)

(Reviews last updated: August 2026)

9.0
Kärcher SE 4001 has a user score of 9.02 points, which is higher than 78.2% of products in this category.
Popularity
What it is: An indicator based on the number of reviews received by products in the Wet-Dry Vacuums category.
When it matters: When you prefer products in the Wet-Dry Vacuums category that have been chosen and reviewed by many other buyers.
10
Kärcher SE 4001 has a popularity of 10 points, which is higher than 66.8% of products in this category.
Ratio quality/price

What it is: An indicator that combines the overall score of products in the Wet-Dry Vacuums category with their prices.

When it matters: When you are comparing products in the Wet-Dry Vacuums category and want a good balance between quality and price.

Score components:

60.0%

7.6

Overall score

40.0%

9.2

Price

8.1
Kärcher SE 4001 has a quality-to-price ratio of 8.1 points, which is higher than 67.3% of products in this category.
Power
What it is: The rated electrical input of the vacuum motor.
When it matters: Higher power can help sustain demanding wet and dry cleaning, although suction design also matters.

Importance: HIGH

1,400 W
Kärcher SE 4001 has power of 1400 W, which is better than 80% of wet-dry vacuums and equal to 5.3% of wet-dry vacuums.
Variable power
What it is: Whether the vacuum lets you adjust motor or suction power.
When it matters: Power adjustment helps match suction to delicate surfaces, heavy debris, and power-tool use.

Importance: MEDIUM

no
Kärcher SE 4001 has fixed suction power. 34.2% of wet-dry vacuums have adjustable suction power.
Capacity
What it is: The amount of liquid or debris the collection tank can hold.
When it matters: A larger tank reduces emptying interruptions during big spills and workshop cleanup.

Importance: HIGH

18 L
Kärcher SE 4001 has capacity of 18 L, which is better than 54.7% of wet-dry vacuums and equal to 2% of wet-dry vacuums.
Noise level
What it is: The sound level produced while the vacuum is running.
When it matters: Lower noise is useful for longer cleaning sessions and work in occupied spaces.

Importance: HIGH

74 dB
Kärcher SE 4001 has noise level of 74 dB, which is better than 67.7% of wet-dry vacuums and equal to 7.5% of wet-dry vacuums.
Suction pressure
What it is: The maximum pressure difference the vacuum can generate for suction.
When it matters: Higher suction pressure helps lift dense debris and extract liquid from difficult areas.

Importance: HIGH

21 kPa
Kärcher SE 4001 has suction pressure of 21 kPa, which is better than 71.9% of wet-dry vacuums and equal to 5.6% of wet-dry vacuums.
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Cordless
What it is: Whether the vacuum can run without a mains power cable.
When it matters: Cordless operation improves mobility in cars, stairs, and areas without a nearby outlet.

Importance: MEDIUM

no
Kärcher SE 4001 requires a power cord. 29.6% of wet-dry vacuums support cordless operation.
Battery type
What it is: The battery chemistry used by a cordless vacuum.
When it matters: Battery chemistry affects weight, charging behavior, lifespan, and replacement options.

Importance: LOW

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Battery runtime
What it is: How long the cordless vacuum can operate on one charge.
When it matters: Longer runtime lets you finish larger jobs without stopping to recharge.

Importance: MEDIUM

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Charging time
What it is: The time required to recharge the battery.
When it matters: Faster charging reduces downtime between cleaning sessions.

Importance: MEDIUM

?
Battery voltage
What it is: The nominal voltage of the vacuum battery system.
When it matters: Voltage helps describe the battery platform and its available power class.

Importance: LOW

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Power cable length
What it is: The length of the vacuum's mains power cable.
When it matters: A longer cable increases reach and reduces how often you change outlets.

Importance: MEDIUM

7.5 m
Kärcher SE 4001 has power cable length of 7.5 m, which is better than 89.1% of wet-dry vacuums and equal to 2.9% of wet-dry vacuums.
Operating radius
What it is: The total working reach provided by the cable, vacuum body, and hose.
When it matters: A larger radius lets you clean more space without moving the plug or machine.

Importance: MEDIUM

9.5 m
Kärcher SE 4001 has operating radius of 9.5 m, which is better than 83.1% of wet-dry vacuums and equal to 5.9% of wet-dry vacuums.
Bagless
What it is: Whether debris is collected directly in a reusable tank instead of a disposable bag.
When it matters: A bagless tank avoids replacement-bag costs and is convenient for wet pickup.

Importance: LOW

no
Kärcher SE 4001 requires collection bags. 66.2% of wet-dry vacuums use a bagless collection system.
Tank material
What it is: The material used for the vacuum's collection tank.
When it matters: Tank material affects durability, corrosion resistance, weight, and ease of cleaning.

Importance: LOW

plastic
Kärcher SE 4001 uses a less suitable tank material.
Power cable holder
What it is: Whether the vacuum has an integrated holder for the power cable.
When it matters: Onboard storage keeps the cable tidy and makes the vacuum easier to carry and store.

Importance: LOW

yes
Kärcher SE 4001 has onboard power-cable storage. This feature is present on 86.9% of wet-dry vacuums.
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N. of filters
What it is: The number of filtration elements supplied or used by the vacuum.
When it matters: Multiple filters can support different pickup modes or provide staged dust capture.

Importance: MEDIUM

2
Kärcher SE 4001 has 2 filters, which is better than 25.3% of wet-dry vacuums and equal to 55.6% of wet-dry vacuums.
HEPA filter
What it is: Whether the vacuum includes a high-efficiency particulate air filter.
When it matters: HEPA filtration helps capture fine dust and allergens from the exhaust air.

Importance: MEDIUM

?
Washable filter
What it is: Whether the filter can be cleaned with water and reused.
When it matters: A washable filter can reduce replacement costs and simplify maintenance.

Importance: MEDIUM

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Automatic filter cleaning
What it is: Whether the vacuum cleans its filter automatically during operation.
When it matters: Automatic cleaning helps maintain suction during dusty work and reduces maintenance stops.

Importance: MEDIUM

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Flexible hose
What it is: Whether a flexible suction hose is included.
When it matters: A flexible hose improves reach and control around furniture, vehicles, and tools.

Importance: LOW

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Kärcher SE 4001 vs the average wet-dry vacuum

  • 27.5 L/s more airflow
    2 L/s more airflow: Kärcher SE 4001 has 70 L/s, while the average wet-dry vacuum has 42.5 L/s.
    What it is: The volume of air the vacuum moves through the hose each second.
    When it matters: Higher airflow helps collect light, bulky debris and clear larger surfaces quickly.

    Importance: HIGH

    2 L/s more airflow: Kärcher SE 4001 has 70 L/s, while the average wet-dry vacuum has 42.5 L/s.70 L/s vs 42.5 L/s
  • 3 kPa more suction pressure
    2 kPa more suction pressure: Kärcher SE 4001 has 21 kPa, while the average wet-dry vacuum has 18 kPa.
    What it is: The maximum pressure difference the vacuum can generate for suction.
    When it matters: Higher suction pressure helps lift dense debris and extract liquid from difficult areas.

    Importance: HIGH

    2 kPa more suction pressure: Kärcher SE 4001 has 21 kPa, while the average wet-dry vacuum has 18 kPa.21 kPa vs 18 kPa
  • 2.49 m more operating radius
    2 m more operating radius: Kärcher SE 4001 has 9.5 m, while the average wet-dry vacuum has 7.01 m.
    What it is: The total working reach provided by the cable, vacuum body, and hose.
    When it matters: A larger radius lets you clean more space without moving the plug or machine.

    Importance: MEDIUM

    2 m more operating radius: Kärcher SE 4001 has 9.5 m, while the average wet-dry vacuum has 7.01 m.9.5 m vs 7.01 m
  • 200 W more motor power
    2 W more motor power: Kärcher SE 4001 has 1400 W, while the average wet-dry vacuum has 1200 W.
    What it is: The rated electrical input of the vacuum motor.
    When it matters: Higher power can help sustain demanding wet and dry cleaning, although suction design also matters.

    Importance: HIGH

    2 W more motor power: Kärcher SE 4001 has 1400 W, while the average wet-dry vacuum has 1200 W.1400 W vs 1200 W
  • 2.5 m more cable length
    2 m more cable length: Kärcher SE 4001 has 7.5 m, while the average wet-dry vacuum has 5 m.
    What it is: The length of the vacuum's mains power cable.
    When it matters: A longer cable increases reach and reduces how often you change outlets.

    Importance: MEDIUM

    2 m more cable length: Kärcher SE 4001 has 7.5 m, while the average wet-dry vacuum has 5 m.7.5 m vs 5 m
  • 3 dB less operating noise
    2 dB less operating noise: Kärcher SE 4001 has 74 dB, while the average wet-dry vacuum has 77 dB.
    What it is: The sound level produced while the vacuum is running.
    When it matters: Lower noise is useful for longer cleaning sessions and work in occupied spaces.

    Importance: HIGH

    2 dB less operating noise: Kärcher SE 4001 has 74 dB, while the average wet-dry vacuum has 77 dB.74 dB vs 77 dB
  • 105 mm less height
    2 mm less height: Kärcher SE 4001 has 480 mm, while the average wet-dry vacuum has 585 mm.
    What it is: The overall height of the vacuum.
    When it matters: A lower body may fit under shelves and be easier to store or transport.

    Importance: LOW

    2 mm less height: Kärcher SE 4001 has 480 mm, while the average wet-dry vacuum has 585 mm.480 mm vs 585 mm
  • 3 L more tank capacity
    2 L more tank capacity: Kärcher SE 4001 has 18 L, while the average wet-dry vacuum has 15 L.
    What it is: The amount of liquid or debris the collection tank can hold.
    When it matters: A larger tank reduces emptying interruptions during big spills and workshop cleanup.

    Importance: HIGH

    2 L more tank capacity: Kärcher SE 4001 has 18 L, while the average wet-dry vacuum has 15 L.18 L vs 15 L
  • 27.5 L/s more airflow
    2 L/s more airflow: Kärcher SE 4001 has 70 L/s, while the average wet-dry vacuum has 42.5 L/s.
  • 3 kPa more suction pressure
    2 kPa more suction pressure: Kärcher SE 4001 has 21 kPa, while the average wet-dry vacuum has 18 kPa.
  • 200 W more motor power
    2 W more motor power: Kärcher SE 4001 has 1400 W, while the average wet-dry vacuum has 1200 W.
  • 3 dB less operating noise
    2 dB less operating noise: Kärcher SE 4001 has 74 dB, while the average wet-dry vacuum has 77 dB.
  • 3 L more tank capacity
    2 L more tank capacity: Kärcher SE 4001 has 18 L, while the average wet-dry vacuum has 15 L.
  • 2.49 m more operating radius
    2 m more operating radius: Kärcher SE 4001 has 9.5 m, while the average wet-dry vacuum has 7.01 m.
  • 2.5 m more cable length
    2 m more cable length: Kärcher SE 4001 has 7.5 m, while the average wet-dry vacuum has 5 m.
  • 105 mm less height
    2 mm less height: Kärcher SE 4001 has 480 mm, while the average wet-dry vacuum has 585 mm.
  • No automatic full-tank shut-off
    Kärcher SE 4001 does not have automatic full-tank shut-off, while the average wet-dry vacuum has automatic full-tank shut-off.
  • 2.13 kg more weight
    2 kg more weight: Kärcher SE 4001 has 7.8 kg, while the average wet-dry vacuum has 5.67 kg.
  • Requires collection bags
    Kärcher SE 4001 uses a bagged collection system, while the average wet-dry vacuum uses a bagless collection system.
  • 91 mm more width
    2 mm more width: Kärcher SE 4001 has 441 mm, while the average wet-dry vacuum has 350 mm.
  • 0.13 m less hose length
    2 m less hose length: Kärcher SE 4001 has 2 m, while the average wet-dry vacuum has 2.134 m.
  • 39 mm more depth
    2 mm more depth: Kärcher SE 4001 has 386 mm, while the average wet-dry vacuum has 347 mm.
  • 7984.3 cm³ more external volume
    2 cm³ more external volume: Kärcher SE 4001 has 81708.5 cm³, while the average wet-dry vacuum has 73724.2 cm³.
  • No automatic full-tank shut-off
    Kärcher SE 4001 does not have automatic full-tank shut-off, while the average wet-dry vacuum has automatic full-tank shut-off.
    What it is: Whether the vacuum stops suction automatically when the liquid tank is full.
    When it matters: Automatic shut-off helps prevent overflow and protects the motor during wet pickup.

    Importance: MEDIUM

    Kärcher SE 4001 does not have automatic full-tank shut-off, while the average wet-dry vacuum has automatic full-tank shut-off.
  • 2.13 kg more weight
    2 kg more weight: Kärcher SE 4001 has 7.8 kg, while the average wet-dry vacuum has 5.67 kg.
    What it is: The total mass of the vacuum.
    When it matters: Lower weight makes carrying, stair cleaning, and transport easier.

    Importance: HIGH

    2 kg more weight: Kärcher SE 4001 has 7.8 kg, while the average wet-dry vacuum has 5.67 kg.7.8 kg vs 5.67 kg
  • Requires collection bags
    Kärcher SE 4001 uses a bagged collection system, while the average wet-dry vacuum uses a bagless collection system.
    What it is: Whether debris is collected directly in a reusable tank instead of a disposable bag.
    When it matters: A bagless tank avoids replacement-bag costs and is convenient for wet pickup.

    Importance: LOW

    Kärcher SE 4001 uses a bagged collection system, while the average wet-dry vacuum uses a bagless collection system.
  • 91 mm more width
    2 mm more width: Kärcher SE 4001 has 441 mm, while the average wet-dry vacuum has 350 mm.
    What it is: The side-to-side width of the vacuum body.
    When it matters: A narrower vacuum is easier to store and maneuver through tight spaces.

    Importance: LOW

    2 mm more width: Kärcher SE 4001 has 441 mm, while the average wet-dry vacuum has 350 mm.441 mm vs 350 mm
  • 39 mm more depth
    2 mm more depth: Kärcher SE 4001 has 386 mm, while the average wet-dry vacuum has 347 mm.
    What it is: The front-to-back depth of the vacuum body.
    When it matters: Less depth can make the vacuum easier to store on shelving or in a small workshop.

    Importance: LOW

    2 mm more depth: Kärcher SE 4001 has 386 mm, while the average wet-dry vacuum has 347 mm.386 mm vs 347 mm
  • 0.13 m less hose length
    2 m less hose length: Kärcher SE 4001 has 2 m, while the average wet-dry vacuum has 2.134 m.
    What it is: The length of the vacuum's suction hose.
    When it matters: A longer hose improves reach around vehicles, benches, and large workpieces.

    Importance: MEDIUM

    2 m less hose length: Kärcher SE 4001 has 2 m, while the average wet-dry vacuum has 2.134 m.2 m vs 2.134 m
  • 7984.3 cm³ more external volume
    2 cm³ more external volume: Kärcher SE 4001 has 81708.5 cm³, while the average wet-dry vacuum has 73724.2 cm³.
    What it is: The approximate external volume of the vacuum body.
    When it matters: A more compact machine takes up less storage and vehicle space.

    Importance: LOW

    2 cm³ more external volume: Kärcher SE 4001 has 81708.5 cm³, while the average wet-dry vacuum has 73724.2 cm³.81708.5 cm³ vs 73724.2 cm³
  • 2x more expensive
    Kärcher SE 4001 is more expensive than the average wet-dry vacuum (£260 vs £130).
    Kärcher SE 4001 is more expensive than the average wet-dry vacuum (£260 vs £130).£260 vs £130

Graphic comparison of Kärcher SE 4001 and other products in the Wet-Dry Vacuums category

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Third-party reviews

United Kingdom

(Reviews last updated: August 2026)

What customers like about Kärcher SE 4001?

  • Versatile multi-purpose tool that operates effectively as both a dry utility vacuum and a wet spray-extraction carpet cleaner.
  • Powerful 1400W suction capability that effectively lifts liquids, damp messes, and embedded dirt from vehicle interiors, tiles, and rugs.
  • Faster surface drying times compared to traditional machines thanks to innovative nozzle extraction technology.
  • Robust, shock-proof 4-litre translucent fresh water tank that is easy to monitor, attach, and remove for filling.
  • Clever 3-in-1 carrying handle which makes transport, opening, closing, and emptying the main container highly convenient.
  • Excellent build quality utilizing solid, tightly manufactured plastic components that do not wobble or rattle.

What customers dislike about Kärcher SE 4001?

  • Transitioning from standard dry vacuuming to wet carpet extraction can be tedious and requires manual hose and cable clipping.
  • Lacks a motorized brush bar or mechanical roller to agitate fibers, meaning deep or stubborn stains require manual pre-scrubbing.
  • Bulky, heavy, and awkward canister form factor that demands significant storage space and can be cumbersome to maneuver.
  • The fresh water tank is wide and awkward to fit underneath shallow, standard-sized household sinks for refills.
  • The unhelpful user manual is confusingly illustrated and difficult to follow for first-time operators.
  • No automatic safety shut-off or warning indicator when the fresh water tank empties, causing the pump to loudly run dry.

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