OVERALL
ALTERNATIVES
SPECS
VS AVERAGE
REVIEWS
Scored using Wet-Dry Vacuums Methodology v1.0
Wet-Dry Vacuums Methodology v1.0
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Products in this category are evaluated mathematically under Frontumo Wet-Dry Vacuums Methodology v1.0 using verified laboratory benchmarks, technical specifications, and authentic consumer ratings with 0% commercial bias.
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Nilfisk AERO 21 INOX Review | 43 Data compared

Avg. price:~£310Suction pressure:21 kPaCapacity:20 LPower:1250 WNoise level:64 dBWeight:8.5 kg

Nilfisk AERO 21 INOX 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.

7.2

Overall score

Score
7.2/ 10
✕
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 distribution
▼
<55-66-77-88-99-10
▲ Better than 86% of models
Score components

80%

7.0

Technical score

20%

7.8

User score

▲Better than 86% of wet-dry-vacuums
7.0

Technical score

Technical score
7.0/ 10
✕
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 distribution
▼
<55-66-77-88-99-10
▲ Better than 86% of models
Score components

40%

7.5

Performance

22%

6.8

Design & Mobility

20%

9.1

Filter & Accessories

18%

4.0

Battery

▲Better than 86% of wet-dry-vacuums
7.8

User score

User score
7.8/ 10
✕
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 distribution
▼
<55-66-77-88-99-10
▼ Worse than 81% of models
Score components

70%

9.0

User ratings

30%

4.9

Number of reviews

Based on 35 buyer reviews from online shops.
Read buyer reviews on Amazon →
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
▼Worse than 81% of wet-dry-vacuums
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Best prices

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Best rankings

Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.
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Technical Specifications of wet-dry vacuum Nilfisk AERO 21 INOX

Technical score
Technical score
7.0/ 10
✕
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 distribution
▼
<55-66-77-88-99-10
▲ Better than 86% of models
Score components:

40%

7.5

Performance

22%

6.8

Design & Mobility

20%

9.1

Filter & Accessories

18%

4.0

Battery

7.0
User score
User score
7.8/ 10
✕
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 distribution
▼
<55-66-77-88-99-10
▼ Worse than 81% of models
Score components

70%

9.0

User ratings

30%

4.9

Number of reviews

Based on 35 buyer reviews from online shops.
Read buyer reviews on Amazon →
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
7.8
Popularity
Popularity
4.9/ 10
✕
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.
Score distribution
▼
<55-66-77-88-99-10
▼ Worse than 61% of models
Popularity:
Nilfisk AERO 21 INOX has a popularity score of 4.9 points, which is lower than 60.9% of products in this category.
4.9
Value for money
Value for money
7.7/ 10
✕
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 distribution
▼
<55-66-77-88-99-10
▲ Better than 67% of models
Score components:

60%

7.2

Overall score

40%

8.9

Price

7.7
Power
1,250 W
Power
1,250 W
▲ Better than 67% of models
Market range: <220 W – >1.5k W
This wet-dry vacuum has a power output of 1,250 W, which is higher than that of 66.7% of wet-dry vacuums and the same as that of 7.5% of wet-dry vacuums.
Variable power
no
Variable power
no
▼ Worse than 35% of models
This wet-dry vacuum does not have adjustable suction power. This feature is present on 35% of wet-dry vacuums.
Capacity
20 L
Capacity
20 L
▲ Better than 58% of models
Market range: <0.7 L – >30 L
This wet-dry vacuum has a tank capacity of 20 L, which is larger than that of 57.9% of wet-dry vacuums and the same as that of 15.4% of wet-dry vacuums.
Noise level
64 dB
Noise level
64 dB
★ Better than 99% of models
Market range: <70 dB – >80 dB
This wet-dry vacuum operates at a noise level of 64 dB, which is lower than that of 99.5% of wet-dry vacuums.
Suction pressure
21 kPa
Suction pressure
21 kPa
▲ Better than 72% of models
Market range: <11.5 kPa – >24 kPa
This wet-dry vacuum has a suction pressure of 21 kPa, which is higher than that of 71.7% of wet-dry vacuums and the same as that of 5.6% of wet-dry vacuums.
Show more
Cordless
no
Cordless
no
▼ Worse than 30% of models
This wet-dry vacuum requires a power cord. This feature is present on 29.6% of wet-dry vacuums.
Battery type
N/A
Battery runtime
N/A
Charging time
N/A
Battery voltage
N/A
Show more
Power cable length
5 m
Power cable length
5 m
▲ Better than 45% of models
Market range: <3 m – >7.5 m
This wet-dry vacuum has a power cable measuring 5 m, which is longer than that of 45.4% of wet-dry vacuums and the same length as that of 34% of wet-dry vacuums.
Operating radius
8.5 m
Operating radius
8.5 m
▲ Better than 77% of models
Market range: <4.5 m – >10 m
This wet-dry vacuum has an operating radius of 8.5 m, which is larger than that of 77.1% of wet-dry vacuums and the same as that of 1.4% of wet-dry vacuums.
Bagless
no
Bagless
no
▼ Worse than 67% of models
This wet-dry vacuum uses a dust bag. This feature is present on 66.5% of wet-dry vacuums.
Tank material
stainless steel
Tank material
stainless steel
▲ Better than 69% of models
This wet-dry vacuum uses stainless steel for its tank, which is more durable than the tank materials used by 68.8% of wet-dry vacuums and comparable in durability to those used by 31.2% of them.
Power cable holder
yes
Power cable holder
yes
▲ Better than 35% of models
This wet-dry vacuum has a holder for the power cord. This feature is present on 65.5% of wet-dry vacuums.
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N. of filters
2
N. of filters
2
▲ Better than 25% of models
Market range: <1 – >3
This wet-dry vacuum has 2 filters, more than 24.8% of wet-dry vacuums and the same number as 56.4% of wet-dry vacuums.
HEPA filter
yes
HEPA filter
yes
▲ Better than 58% of models
This wet-dry vacuum includes a HEPA filter. This feature is present on 41.9% of wet-dry vacuums.
Washable filter
yes
Washable filter
yes
▲ Better than 8% of models
This wet-dry vacuum includes a washable filter. This feature is present on 92% of wet-dry vacuums.
Automatic filter cleaning
yes
Automatic filter cleaning
yes
★ Better than 91% of models
This wet-dry vacuum has automatic filter cleaning. This feature is present on 9.4% of wet-dry vacuums.
Flexible hose
yes
Flexible hose
yes
▲ Better than 27% of models
This wet-dry vacuum includes a flexible hose. This feature is present on 72.9% of wet-dry vacuums.
Show more

Nilfisk AERO 21 INOX vs the average wet-dry vacuum

246810TotalPerformanceBatteryDesign & MobilityFilter & Accessories
  • 12 dB less operating noise
    Noise level
    64 dB
    ★ Better than 99% of models
    Market range: <70 dB – >80 dB
    This wet-dry vacuum operates at a noise level of 64 dB; the average wet-dry vacuum operates at a noise level of 76 dB.
    64 dB vs 76 dB
  • Automatic filter cleaning
    Automatic filter cleaning
    yes
    ★ Better than 91% of models
    This wet-dry vacuum has automatic filter cleaning; the average wet-dry vacuum does not have automatic filter cleaning.
  • Includes a HEPA filter
    HEPA filter
    yes
    ▲ Better than 58% of models
    This wet-dry vacuum includes a HEPA filter; the average wet-dry vacuum does not include a HEPA filter.
  • 3 kPa more suction pressure
    Suction pressure
    21 kPa
    ▲ Better than 72% of models
    Market range: <11.5 kPa – >24 kPa
    This wet-dry vacuum has a suction pressure of 21 kPa; the average wet-dry vacuum has a suction pressure of 18 kPa.
    21 kPa vs 18 kPa
  • Power-tool socket
    Power tool socket
    yes
    ▲ Better than 79% of models
    This wet-dry vacuum has a socket for power tools; the average wet-dry vacuum does not have a socket for power tools.
  • More durable tank material
    Tank material
    stainless steel
    ▲ Better than 69% of models
    This wet-dry vacuum has a tank made of stainless steel; the average wet-dry vacuum has a tank made of plastic.
    stainless steel vs plastic
  • 17.5 L/s more airflow
    Airflow
    60 L/s
    ▲ Better than 71% of models
    Market range: <25 L/s – >70 L/s
    This wet-dry vacuum delivers an airflow of 60 L/s; the average wet-dry vacuum delivers an airflow of 42.5 L/s.
    60 L/s vs 42.5 L/s
  • Upholstery nozzle
    Upholstery nozzle
    yes
    ▲ Better than 83% of models
    This wet-dry vacuum includes an upholstery nozzle; the average wet-dry vacuum does not include an upholstery nozzle.
  • 2.9% better value for money
    Nilfisk AERO 21 INOX offers better value for money than the average wet-dry vacuum (7.69 vs 7.5).
    7.69 vs 7.48
  • 12 dB less operating noise
    Noise level
    64 dB
    ★ Better than 99% of models
    Market range: <70 dB – >80 dB
    This wet-dry vacuum operates at a noise level of 64 dB; the average wet-dry vacuum operates at a noise level of 76 dB.
    64 dB vs 76 dB
  • 3 kPa more suction pressure
    Suction pressure
    21 kPa
    ▲ Better than 72% of models
    Market range: <11.5 kPa – >24 kPa
    This wet-dry vacuum has a suction pressure of 21 kPa; the average wet-dry vacuum has a suction pressure of 18 kPa.
    21 kPa vs 18 kPa
  • 17.5 L/s more airflow
    Airflow
    60 L/s
    ▲ Better than 71% of models
    Market range: <25 L/s – >70 L/s
    This wet-dry vacuum delivers an airflow of 60 L/s; the average wet-dry vacuum delivers an airflow of 42.5 L/s.
    60 L/s vs 42.5 L/s
  • 5 L more tank capacity
    Capacity
    20 L
    ▲ Better than 58% of models
    Market range: <0.7 L – >30 L
    This wet-dry vacuum has a tank capacity of 20 L; the average wet-dry vacuum has a tank capacity of 15 L.
    20 L vs 15 L
  • 100 W more motor power
    Power
    1,250 W
    ▲ Better than 67% of models
    Market range: <220 W – >1.5k W
    This wet-dry vacuum has a power output of 1250 W; the average wet-dry vacuum has a power output of 1150 W.
    1,250 W vs 1,150 W
  • Power-tool socket
    Power tool socket
    yes
    ▲ Better than 79% of models
    This wet-dry vacuum has a socket for power tools; the average wet-dry vacuum does not have a socket for power tools.
  • More durable tank material
    Tank material
    stainless steel
    ▲ Better than 69% of models
    This wet-dry vacuum has a tank made of stainless steel; the average wet-dry vacuum has a tank made of plastic.
    stainless steel vs plastic
  • 1.3 m more operating radius
    Operating radius
    8.5 m
    ▲ Better than 77% of models
    Market range: <4.5 m – >10 m
    This wet-dry vacuum has an operating radius of 8.5 m; the average wet-dry vacuum has an operating radius of 7.2 m.
    8.5 m vs 7.2 m
  • 0.37 m more hose length
    Suction hose length
    2.5 m
    ▲ Better than 71% of models
    Market range: <1.5 m – >3 m
    This wet-dry vacuum has a suction hose length of 2.5 m; the average wet-dry vacuum has a suction hose length of 2.134 m.
    2.5 m vs 2.134 m
  • Automatic filter cleaning
    Automatic filter cleaning
    yes
    ★ Better than 91% of models
    This wet-dry vacuum has automatic filter cleaning; the average wet-dry vacuum does not have automatic filter cleaning.
  • Includes a HEPA filter
    HEPA filter
    yes
    ▲ Better than 58% of models
    This wet-dry vacuum includes a HEPA filter; the average wet-dry vacuum does not include a HEPA filter.
  • Upholstery nozzle
    Upholstery nozzle
    yes
    ▲ Better than 83% of models
    This wet-dry vacuum includes an upholstery nozzle; the average wet-dry vacuum does not include an upholstery nozzle.
  • Soft brush
    Soft brush
    yes
    ▲ Better than 88% of models
    This wet-dry vacuum includes a soft brush; the average wet-dry vacuum does not include a soft brush.
  • 49.1% heavier
    Weight
    8.5 kg
    ▼ Worse than 85% of models
    Market range: <3.79 kg – >9.1 kg
    40% heavier: this wet-dry vacuum is heavier than the average wet-dry vacuum (8.5 kg vs 5.7 kg).
    8.5 kg vs 5.7 kg
  • No automatic full-tank shut-off
    Automatic shut-off when full
    no
    ▼ Worse than 66% of models
    This wet-dry vacuum does not have automatic shut-off when the tank is full; the average wet-dry vacuum has automatic shut-off when the tank is full.
  • Requires collection bags
    Bagless
    no
    ▼ Worse than 67% of models
    This wet-dry vacuum uses a dust bag; the average wet-dry vacuum is bagless.
  • 11.1% more external volume
    Volume
    81,900 cm³
    ▼ Worse than 70% of models
    Market range: <41.2k cm³ – >109k cm³
    This wet-dry vacuum has a volume of 81900 cm³; the average wet-dry vacuum has a volume of 73724.2 cm³.
    81,900 cm³ vs 73,724.2 cm³
  • 3 mm less hose diameter
    Suction hose diameter
    32 mm
    ▼ Worse than 78% of models
    Market range: <31.75 mm – >47.625 mm
    This wet-dry vacuum has a suction hose diameter of 32 mm; the average wet-dry vacuum has a suction hose diameter of 35 mm.
    32 mm vs 35 mm
  • 2.38x more expensive
    Nilfisk AERO 21 INOX is more expensive than the average wet-dry vacuum (£310 vs £130).
    £310 vs £130
  • 2.5% lower user score
    User score
    7.8/ 10
    ✕
    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 distribution
    ▼▼
    <55-66-77-88-99-10
    Nilfisk AERO 21 INOX
    the average wet-dry vacuum
    Nilfisk AERO 21 INOX has a lower user score than the average wet-dry vacuum (7.80 vs 8.000).
    7.8 vs 8
  • 34.1% less popular
    Nilfisk AERO 21 INOX is less popular than the average wet-dry vacuum (4.91 vs 6.6).
    4.91 vs 6.58
  • 2.38x more expensive
    Nilfisk AERO 21 INOX is more expensive than the average wet-dry vacuum (£310 vs £130).
    £310 vs £130
  • 2.5% lower user score
    User score
    7.8/ 10
    ✕
    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 distribution
    ▼▼
    <55-66-77-88-99-10
    Nilfisk AERO 21 INOX
    the average wet-dry vacuum
    Nilfisk AERO 21 INOX has a lower user score than the average wet-dry vacuum (7.80 vs 8.000).
    7.8 vs 8
  • 34.1% less popular
    Nilfisk AERO 21 INOX is less popular than the average wet-dry vacuum (4.91 vs 6.6).
    4.91 vs 6.58
  • No automatic full-tank shut-off
    Automatic shut-off when full
    no
    ▼ Worse than 66% of models
    This wet-dry vacuum does not have automatic shut-off when the tank is full; the average wet-dry vacuum has automatic shut-off when the tank is full.
  • 49.1% heavier
    Weight
    8.5 kg
    ▼ Worse than 85% of models
    Market range: <3.79 kg – >9.1 kg
    40% heavier: this wet-dry vacuum is heavier than the average wet-dry vacuum (8.5 kg vs 5.7 kg).
    8.5 kg vs 5.7 kg
  • Requires collection bags
    Bagless
    no
    ▼ Worse than 67% of models
    This wet-dry vacuum uses a dust bag; the average wet-dry vacuum is bagless.
  • 11.1% more external volume
    Volume
    81,900 cm³
    ▼ Worse than 70% of models
    Market range: <41.2k cm³ – >109k cm³
    This wet-dry vacuum has a volume of 81900 cm³; the average wet-dry vacuum has a volume of 73724.2 cm³.
    81,900 cm³ vs 73,724.2 cm³
  • 3 mm less hose diameter
    Suction hose diameter
    32 mm
    ▼ Worse than 78% of models
    Market range: <31.75 mm – >47.625 mm
    This wet-dry vacuum has a suction hose diameter of 32 mm; the average wet-dry vacuum has a suction hose diameter of 35 mm.
    32 mm vs 35 mm

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

Third-party reviews

Based on 35 buyer reviews from online shops.
Reviews last updated: August 2026 · How we calculate this
Read buyer reviews on Amazon →

What we like about Nilfisk AERO 21 INOX

  • Powerful suction for both wet and dry messes
  • Relatively quiet operation compared to other industrial shop vacuums
  • Durable and premium feel thanks to the stainless steel (INOX) container
  • Convenient 'Push & Clean' semi-automatic filter cleaning system
  • Compact, lightweight, and easy to transport to job sites
  • Onboard accessory storage and integrated hose management
  • Built-in power outlet with AutoOnOff feature for synchronized power tool operation

What we don't like about Nilfisk AERO 21 INOX

  • The power cord and suction hose are often reviewed as being too short
  • The power cord does not automatically rewind and must be manually wrapped
  • Fleece filter bags can be expensive to replace regularly
  • The included floor nozzle and extensions feel basic compared to the robust motor unit

Verdict

The Nilfisk AERO 21 INOX is a compact professional wet and dry vacuum with a 1,250 W motor, up to 3,600 L/min airflow, 210 mbar vacuum and a 20 L stainless-steel container. Push&Clean semi-automatic filter cleaning, a washable PET filter rated above 99.9%, an AutoOnOff power-tool socket, blower function and 64 dB(A) noise are key benefits. Its 20 L capacity may be modest for large intensive jobs, and the supplied plastic and aluminium extension tubes are less flexible than higher-tier systems.

Compare Nilfisk AERO 21 INOX with other products in the Wet-Dry Vacuums category

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