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Karcher SG 4/4 Review | 61 Data compared

Avg. price in UK: ~£1,220
Avg. price in US: ~$1,590
Steam pressure: 4 bar
Heat-up time: 1,080 seconds
Power rating: 2,300 W
Water tank capacity: 2000 ml
Weight: 8 kg

Karcher SG 4/4 review. Compare 61 technical specifications and user reviews to see how this product ranks in the Steam Cleaners category and whether it is worth buying.

6.8

Good

8.1

Excellent

1.8

Very poor

3.7
Hard-floor cleaning
Score components:
30.0%
4.0
Rotating / motorized pads
25.0%
4.0
Swivel / flexible floor head
20.0%
1.0
Heat-up time
15.0%
2.3
Weight
10.0%
10
Power rating
3.4
Upholstery cleaning
Score components:
30.0%
4.0
Upholstery / fabric tool
25.0%
4.0
Extension hose
20.0%
1.0
Heat-up time
15.0%
2.3
Weight
10.0%
6.1
Accessory count
5.6
Grout cleaning
Score components:
30.0%
?
Jet nozzle
25.0%
?
Detail brushes included
20.0%
4.0
Extension hose
15.0%
1.0
Heat-up time
10.0%
2.3
Weight
4.9
Car-interior cleaning
Score components:
25.0%
4.0
Extension hose
20.0%
?
Jet nozzle
15.0%
?
Detail brushes included
15.0%
1.0
Heat-up time
15.0%
2.3
Weight
10.0%
6.1
Accessory count

Best prices in UK

Best rankings

#14 in Best Professional Steam Cleaners
#21 in Best Karcher Steam Cleaners
#89 in Best Steam Cleaners for Sofas and Upholstery
#90 in Best Steam Cleaners for Tiles
#91 in Best Steam Cleaners for Grout
#95 in Best Steam Cleaners for Floors
#116 in Best Steam Cleaners

Verdict

The Kärcher SG 4/4 is a 2,300 W professional steam cleaner producing up to 4 bar of pressure and boiler temperatures as high as 145 °C for chemical-free hygienic cleaning. Its dual-tank system combines a 2.4-litre boiler with a 2-litre clean-water tank, allowing continuous refilling, while the 7.5-metre cable provides a broad working radius. Integrated accessory storage and the VapoHydro function, which progressively adds hot water to the steam, help tackle greasy and stubborn dirt. The principal drawbacks are a warm-up time of around nine minutes, an 8 kg empty weight and a high purchase cost aimed mainly at commercial users.

Technical Specifications of steam cleaner Karcher SG 4/4

Overall score

6.8

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Popularity

What it is: An indicator based on the number of reviews received by products in the Steam Cleaners category.

When it matters: When you prefer products in the Steam Cleaners category that have been chosen and reviewed by many other buyers.

Performance

7.8

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Steam pressure

What it is: Measures the steam pressure of the steam cleaner.

When it matters: This matters when you compare steam cleaners by steam pressure.

Importance: HIGH

Steam temperature

What it is: Measures the steam temperature of the steam cleaner.

When it matters: This matters when you compare steam cleaners by steam temperature.

Importance: HIGH

?

Steam flow rate

What it is: Measures the steam flow rate of the steam cleaner.

When it matters: This matters when you compare steam cleaners by steam flow rate.

Importance: HIGH

Heat-up time

What it is: Measures the heat-up time of the steam cleaner.

When it matters: This matters when you compare steam cleaners by heat-up time.

Importance: MEDIUM

Continuous steam time

What it is: Measures the continuous steam time of the steam cleaner.

When it matters: This matters when you compare steam cleaners by continuous steam time.

Importance: MEDIUM

?

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Tank

9.0

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Cordless

What it is: Shows whether the steam cleaner has cordless.

When it matters: This matters when you compare steam cleaners by cordless.

Importance: LOW

Action radius

What it is: Measures the action radius of the steam cleaner.

When it matters: This matters when you compare steam cleaners by action radius.

Importance: MEDIUM

Stainless steel boiler

What it is: Shows whether the steam cleaner has stainless steel boiler.

When it matters: This matters when you compare steam cleaners by stainless steel boiler.

Importance: LOW

Power rating

What it is: Measures the power rating of the steam cleaner.

When it matters: This matters when you compare steam cleaners by power rating.

Importance: LOW

Water tank capacity

What it is: Measures the water tank capacity of the steam cleaner.

When it matters: This matters when you compare steam cleaners by water tank capacity.

Importance: HIGH

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Versatility

9.1

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Suitable for allergy sufferers

What it is: Shows whether the steam cleaner has suitable for allergy sufferers.

When it matters: This matters when you compare steam cleaners by suitable for allergy sufferers.

Importance: MEDIUM

Product type

What it is: Describes the product type of the steam cleaner.

When it matters: This matters when you compare steam cleaners by product type.

Importance: LOW

canister steam cleaner

Convertible handheld design

What it is: Shows whether the steam cleaner has convertible handheld design.

When it matters: This matters when you compare steam cleaners by convertible handheld design.

Importance: LOW

Steam vacuum function

What it is: Shows whether the steam cleaner has steam vacuum function.

When it matters: This matters when you compare steam cleaners by steam vacuum function.

Importance: LOW

?

Floor nozzle type

What it is: Describes the floor nozzle type of the steam cleaner.

When it matters: This matters when you compare steam cleaners by floor nozzle type.

Importance: LOW

Rectangular floor head

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Accessories

6.3

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Accessory count

What it is: Measures the accessory count of the steam cleaner.

When it matters: This matters when you compare steam cleaners by accessory count.

Importance: MEDIUM

Mop pads included

What it is: Measures the mop pads included of the steam cleaner.

When it matters: This matters when you compare steam cleaners by mop pads included.

Importance: LOW

?

Carpet glider included

What it is: Shows whether the steam cleaner has carpet glider included.

When it matters: This matters when you compare steam cleaners by carpet glider included.

Importance: LOW

?

Extension tubes / wands

What it is: Shows whether the steam cleaner has extension tubes / wands.

When it matters: This matters when you compare steam cleaners by extension tubes / wands.

Importance: LOW

?

Extension hose

What it is: Shows whether the steam cleaner has extension hose.

When it matters: This matters when you compare steam cleaners by extension hose.

Importance: LOW

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Design

6.6

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Wheels

What it is: Shows whether the steam cleaner has wheels.

When it matters: This matters when you compare steam cleaners by wheels.

Importance: LOW

Volume

What it is: Measures the volume of the steam cleaner.

When it matters: This matters when you compare steam cleaners by volume.

Importance: LOW

Weight

What it is: Measures the weight of the steam cleaner.

When it matters: This matters when you compare steam cleaners by weight.

Importance: MEDIUM

Width

What it is: Measures the width of the steam cleaner.

When it matters: This matters when you compare steam cleaners by width.

Importance: LOW

Height

What it is: Measures the height of the steam cleaner.

When it matters: This matters when you compare steam cleaners by height.

Importance: LOW

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Safety

8.0

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Child safety lock

What it is: Shows whether the steam cleaner has child safety lock.

When it matters: This matters when you compare steam cleaners by child safety lock.

Importance: LOW

Safety valve / safety cap

What it is: Shows whether the steam cleaner has safety valve / safety cap.

When it matters: This matters when you compare steam cleaners by safety valve / safety cap.

Importance: LOW

Auto shut-off

What it is: Shows whether the steam cleaner has auto shut-off.

When it matters: This matters when you compare steam cleaners by auto shut-off.

Importance: LOW

Trigger lock / continuous steam lock

What it is: Shows whether the steam cleaner has trigger lock / continuous steam lock.

When it matters: This matters when you compare steam cleaners by trigger lock / continuous steam lock.

Importance: LOW

?

Descaling system

What it is: Shows whether the steam cleaner has descaling system.

When it matters: This matters when you compare steam cleaners by descaling system.

Importance: LOW

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Karcher SG 4/4 vs the average steam cleaner

Why is Karcher SG 4/4 better than the average steam cleaner?

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1200 ml larger water tank capacity
Karcher SG 4/4 has a larger water tank capacity than the average steam cleaner (2000 ml vs 800 ml).
What it is: Measures the water tank capacity of the steam cleaner.
When it matters: This matters when you compare steam cleaners by water tank capacity.
Importance: HIGH
Karcher SG 4/4 has a larger water tank capacity than the average steam cleaner (2000 ml vs 800 ml).2000 ml vs 800 ml
1400 ml larger boiler capacity
Karcher SG 4/4 has a larger boiler capacity than the average steam cleaner (2400 ml vs 1000 ml).
What it is: Measures the boiler capacity of the steam cleaner.
When it matters: This matters when you compare steam cleaners by boiler capacity.
Importance: MEDIUM
Karcher SG 4/4 has a larger boiler capacity than the average steam cleaner (2400 ml vs 1000 ml).2400 ml vs 1000 ml
3.79 m longer action radius
Karcher SG 4/4 has a longer action radius than the average steam cleaner (11 m vs 7.21 m).
What it is: Measures the action radius of the steam cleaner.
When it matters: This matters when you compare steam cleaners by action radius.
Importance: MEDIUM
Karcher SG 4/4 has a longer action radius than the average steam cleaner (11 m vs 7.21 m).11 m vs 7.21 m
800 W higher power rating
Karcher SG 4/4 has a higher power rating than the average steam cleaner (2300 W vs 1500 W).
What it is: Measures the power rating of the steam cleaner.
When it matters: This matters when you compare steam cleaners by power rating.
Importance: LOW
Karcher SG 4/4 has a higher power rating than the average steam cleaner (2300 W vs 1500 W).2300 W vs 1500 W
41 g/min higher steam flow rate
Karcher SG 4/4 has a higher steam flow rate than the average steam cleaner (82 g/min vs 41 g/min).
What it is: Measures the steam flow rate of the steam cleaner.
When it matters: This matters when you compare steam cleaners by steam flow rate.
Importance: HIGH
Karcher SG 4/4 has a higher steam flow rate than the average steam cleaner (82 g/min vs 41 g/min).82 g/min vs 41 g/min
0.5 m longer hose
Karcher SG 4/4 has a longer hose than the average steam cleaner (2.5 m vs 2 m).
What it is: Measures the hose length of the steam cleaner.
When it matters: This matters when you compare steam cleaners by hose length.
Importance: MEDIUM
Karcher SG 4/4 has a longer hose than the average steam cleaner (2.5 m vs 2 m).2.5 m vs 2 m
0.5 bar higher steam pressure
Karcher SG 4/4 has a higher steam pressure than the average steam cleaner (4 bar vs 3.5 bar).
What it is: Measures the steam pressure of the steam cleaner.
When it matters: This matters when you compare steam cleaners by steam pressure.
Importance: HIGH
Karcher SG 4/4 has a higher steam pressure than the average steam cleaner (4 bar vs 3.5 bar).4 bar vs 3.5 bar
2.5 m longer power cord
Karcher SG 4/4 has a longer power cord than the average steam cleaner (7.5 m vs 5 m).
What it is: Measures the power cord length of the steam cleaner.
When it matters: This matters when you compare steam cleaners by power cord length.
Importance: LOW
Karcher SG 4/4 has a longer power cord than the average steam cleaner (7.5 m vs 5 m).7.5 m vs 5 m
41 g/min higher steam flow rate
Karcher SG 4/4 has a higher steam flow rate than the average steam cleaner (82 g/min vs 41 g/min).
0.5 bar higher steam pressure
Karcher SG 4/4 has a higher steam pressure than the average steam cleaner (4 bar vs 3.5 bar).
1200 ml larger water tank capacity
Karcher SG 4/4 has a larger water tank capacity than the average steam cleaner (2000 ml vs 800 ml).
1400 ml larger boiler capacity
Karcher SG 4/4 has a larger boiler capacity than the average steam cleaner (2400 ml vs 1000 ml).
3.79 m longer action radius
Karcher SG 4/4 has a longer action radius than the average steam cleaner (11 m vs 7.21 m).
800 W higher power rating
Karcher SG 4/4 has a higher power rating than the average steam cleaner (2300 W vs 1500 W).
0.5 m longer hose
Karcher SG 4/4 has a longer hose than the average steam cleaner (2.5 m vs 2 m).
2.5 m longer power cord
Karcher SG 4/4 has a longer power cord than the average steam cleaner (7.5 m vs 5 m).
0.6 mm wider cleaning width
Karcher SG 4/4 has a wider cleaning width than the average steam cleaner (32 mm vs 31.4 mm).
60 mm shorter
Karcher SG 4/4 is shorter than the average steam cleaner (270 mm vs 330 mm).
Includes a descaling reminder
Karcher SG 4/4 has a descaling reminder, while the average steam cleaner does not.

Why is Karcher SG 4/4 worse than the average steam cleaner?

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960 seconds longer heat-up time
Karcher SG 4/4 has a longer heat-up time than the average steam cleaner (1080 seconds vs 120 seconds).
No detachable water tank
Karcher SG 4/4 does not have a detachable water tank, while the average steam cleaner does.
No swivel / flexible floor head
Karcher SG 4/4 does not have a swivel or flexible floor head, while the average steam cleaner does.
No upholstery / fabric tool
Karcher SG 4/4 does not have an upholstery or fabric tool, while the average steam cleaner does.
4 kg heavier
Karcher SG 4/4 weighs more than the average steam cleaner (8 kg vs 4 kg).
149.5 mm deeper
Karcher SG 4/4 is deeper than the average steam cleaner (470 mm vs 320.5 mm).
26 mm wider
Karcher SG 4/4 is wider than the average steam cleaner (320 mm vs 294 mm).
960 seconds longer heat-up time
Karcher SG 4/4 has a longer heat-up time than the average steam cleaner (1080 seconds vs 120 seconds).
What it is: Measures the heat-up time of the steam cleaner.
When it matters: This matters when you compare steam cleaners by heat-up time.
Importance: MEDIUM
Karcher SG 4/4 has a longer heat-up time than the average steam cleaner (1080 seconds vs 120 seconds).1080 seconds vs 120 seconds
No upholstery / fabric tool
Karcher SG 4/4 does not have an upholstery or fabric tool, while the average steam cleaner does.
What it is: Shows whether the steam cleaner has upholstery / fabric tool.
When it matters: This matters when you compare steam cleaners by upholstery / fabric tool.
Importance: LOW
Karcher SG 4/4 does not have an upholstery or fabric tool, while the average steam cleaner does.
No detachable water tank
Karcher SG 4/4 does not have a detachable water tank, while the average steam cleaner does.
What it is: Shows whether the steam cleaner has detachable water tank.
When it matters: This matters when you compare steam cleaners by detachable water tank.
Importance: LOW
Karcher SG 4/4 does not have a detachable water tank, while the average steam cleaner does.
4 kg heavier
Karcher SG 4/4 weighs more than the average steam cleaner (8 kg vs 4 kg).
What it is: Measures the weight of the steam cleaner.
When it matters: This matters when you compare steam cleaners by weight.
Importance: MEDIUM
Karcher SG 4/4 weighs more than the average steam cleaner (8 kg vs 4 kg).8 kg vs 4 kg
No swivel / flexible floor head
Karcher SG 4/4 does not have a swivel or flexible floor head, while the average steam cleaner does.
What it is: Shows whether the steam cleaner has swivel / flexible floor head.
When it matters: This matters when you compare steam cleaners by swivel / flexible floor head.
Importance: LOW
Karcher SG 4/4 does not have a swivel or flexible floor head, while the average steam cleaner does.
149.5 mm deeper
Karcher SG 4/4 is deeper than the average steam cleaner (470 mm vs 320.5 mm).
What it is: Measures the depth of the steam cleaner.
When it matters: This matters when you compare steam cleaners by depth.
Importance: LOW
Karcher SG 4/4 is deeper than the average steam cleaner (470 mm vs 320.5 mm).470 mm vs 320.5 mm
9.38x more expensive
Karcher SG 4/4 is more expensive than the average steam cleaner (£1220 vs £130).
Karcher SG 4/4 is more expensive than the average steam cleaner (£1220 vs £130).£1,220 vs £130
4.51x lower user score
Karcher SG 4/4 has a lower user score than the average steam cleaner (1.77 vs 8).
What it is: A rating that combines user reviews with the total review volume for products in the Steam Cleaners category.
When it matters: When you want to know how products in the Steam Cleaners category perform in everyday use and how reliable owners find them over time.
Karcher SG 4/4 has a lower user score than the average steam cleaner (1.77 vs 8).1.77 vs 8

Graphic comparison of Karcher SG 4/4 and other products in the Steam Cleaners category

Attribute category

Attribute

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Third-party reviews

United Kingdom

United States

(Reviews last updated: August 2026)

What customers like about Karcher SG 4/4?

Continuous and uninterrupted operation: Features a 2-tank system that allows the fresh water tank to be refilled without waiting for the boiler to cool down.
Powerful performance: Generates a strong 4 bar steam pressure that easily tackles neglected kitchen appliances, grease, and dirt.
Highly adjustable: Includes stepless variable steam control and the VapoHydro feature to adjust steam saturation (from dry steam to hot water).
Build quality: Designed with a robust, commercial-grade, and durable build.
User-friendly: Easy to operate with a convenient integrated accessory compartment and temperature display.

What customers dislike about Karcher SG 4/4?

Premium price point: Requires a higher initial investment compared to smaller, domestic steam cleaners.
Size and footprint: While compact for a commercial unit, it is heavier and bulkier to store and maneuver than entry-level consumer models.
Initial wait time: Despite the continuous refill system, the machine still requires a brief initial warm-up period.

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