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Klarstein Grandbreeze Eco Review | 44 Data compared

Avg. price:~£580Cooling capacity:12000 BTU/hMaximum room size:59 m²Maximum noise level:63 dBHeating function:noCooling Energy Efficiency Class:A+

Klarstein Grandbreeze Eco Review: Compare 44 technical specifications and user reviews to see how this product ranks in the Portable Air Conditioners category and whether it is worth buying.

Klarstein Grandbreeze Eco
7.5/10

Overall score

Score
7.5/ 10
✕
What it is
An overall evaluation of products in the Portable Air Conditioners category, based on technical analysis and user reviews.
When it matters
When you need a quick reference for identifying the best products in the Portable Air Conditioners category.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 76% of models
Score components

80%

7.7

Technical score

20%

6.7

User score

â–²Better than 76% of portable air conditioners
6.8

Value for money

Value for money
6.8/ 10
✕
What it is
An indicator that combines the overall score of products in the Portable Air Conditioners category with their prices.
When it matters
When you are comparing products in the Portable Air Conditioners category and want a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 81% of models
Score components

70%

7.5

Overall score

30%

5.2

Price

â–¼Worse than 81%
7.7

Technical score

Technical score
7.7/ 10
✕
What it is
An assessment of technical performance for products in the Portable Air Conditioners category across these key areas: Performance, Features, Design.
When it matters
When you want to compare products in the Portable Air Conditioners category by technical performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 83% of models
Score components

55%

8.2

Performance

30%

7.3

Features

15%

6.8

Design

â–²Better than 83%
6.7

User score

User score
6.7/ 10
✕
What it is
A rating that combines user reviews with the total review volume for products in the Portable Air Conditioners category.
When it matters
When you want to know how products in the Portable Air Conditioners category perform in everyday use and how reliable owners find them over time.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 89% of models
Score components

70%

8.0

User ratings

30%

3.7

Number of reviews

Based on ratings from across the web.
â–¼Worse than 89%
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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 portable air conditioner Klarstein Grandbreeze Eco

Technical score
Technical score
7.7/ 10
✕
What it is
An assessment of technical performance for products in the Portable Air Conditioners category across these key areas: Performance, Features, Design.
When it matters
When you want to compare products in the Portable Air Conditioners category by technical performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 83% of models
Score components:

55%

8.2

Performance

30%

7.3

Features

15%

6.8

Design

7.7
User score
User score
6.7/ 10
✕
What it is
A rating that combines user reviews with the total review volume for products in the Portable Air Conditioners category.
When it matters
When you want to know how products in the Portable Air Conditioners category perform in everyday use and how reliable owners find them over time.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 89% of models
Score components

70%

8.0

User ratings

30%

3.7

Number of reviews

Based on ratings from across the web.
6.7
Popularity
Popularity
3.7/ 10
✕
What it is
An indicator based on the number of reviews received by products in the Portable Air Conditioners category.
When it matters
When you prefer products in the Portable Air Conditioners category that have been chosen and reviewed by many other buyers.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 65% of models
Popularity:
Klarstein Grandbreeze Eco has a popularity score of 3.7 points, which is lower than 63.7% of products in this category.
3.7
Value for money
Value for money
6.8/ 10
✕
What it is
An indicator that combines the overall score of products in the Portable Air Conditioners category with their prices.
When it matters
When you are comparing products in the Portable Air Conditioners category and want a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 81% of models
Score components:

70%

7.5

Overall score

30%

5.2

Price

6.8
Cooling capacity
12,000 BTU/h
Market range: <7k BTU/h – >12k BTU/h
This portable air conditioner delivers 12,000 BTU/h cooling capacity, which is higher than that of 71.3% of portable air conditioners and equal to that of 19.7% of portable air conditioners.
Rated input power
?
Cooling Energy Efficiency Class
A+
This portable air conditioner has cooling energy efficiency class A+, which ranks higher than 89.9% of portable air conditioners and equal to 8.9% of portable air conditioners.
Heating energy efficiency class
?
Number of speeds
3
Market range: <0 – >5
This portable air conditioner offers 3 fan speeds, which is more than 36.8% of portable air conditioners and equal to 61.1% of portable air conditioners.
Show more
Fan-only mode
yes
This portable air conditioner includes a fan-only mode. 99.5% of portable air conditioners support this mode.
Airflow direction control
automatic
This portable air conditioner provides automatic airflow direction control, which ranks higher than 47.3% of portable air conditioners and equal to 52.7% of portable air conditioners.
Night mode
yes
This portable air conditioner includes a dedicated night mode. 74.3% of portable air conditioners offer night mode.
Timer
yes
This portable air conditioner includes a built-in timer. 99.5% of portable air conditioners feature a timer.
Maximum timer duration
24 hours
Market range: <0 hours – >25 hours
This portable air conditioner supports a timer of up to 24 hours, which is longer than that of 7.4% of portable air conditioners and equal to that of 92.6% of portable air conditioners.
Show more
Color
black
Display
yes
This portable air conditioner includes an integrated display. 99.5% of portable air conditioners feature a display.
Control type
touch
Remote control
yes
This portable air conditioner comes with a remote control. 99% of portable air conditioners include a remote.
Handles
yes
This portable air conditioner includes built-in handles for easier carrying. 99.5% of portable air conditioners feature handles.
Show more

Klarstein Grandbreeze Eco vs the average portable air conditioner

246810TotalPerformanceFeaturesDesign
  • 3,000 BTU/h higher cooling capacity
    This portable air conditioner delivers higher cooling capacity than the average portable air conditioner (12000 BTU/h vs 9000 BTU/h).
    12,000 BTU/h vs 9,000 BTU/h
  • 29 m² larger room coverage
    This portable air conditioner covers a larger room area than the average portable air conditioner (59 m² vs 30 m²).
    59 m² vs 30 m²
  • 110 m³/h higher high-speed airflow
    This portable air conditioner delivers higher high-speed airflow than the average portable air conditioner (460 m³/h vs 350 m³/h).
    460 m³/h vs 350 m³/h
  • Higher cooling energy efficiency class
    This portable air conditioner has a better cooling energy efficiency class than the average portable air conditioner (A+ vs A).
    A+ vs A
  • 1 dB quieter at maximum output
    This portable air conditioner is quieter at maximum output than the average portable air conditioner (63 dB vs 64 dB).
    63 dB vs 64 dB
  • 3,000 BTU/h higher cooling capacity
    This portable air conditioner delivers higher cooling capacity than the average portable air conditioner (12000 BTU/h vs 9000 BTU/h).
    12,000 BTU/h vs 9,000 BTU/h
  • 29 m² larger room coverage
    This portable air conditioner covers a larger room area than the average portable air conditioner (59 m² vs 30 m²).
    59 m² vs 30 m²
  • 110 m³/h higher high-speed airflow
    This portable air conditioner delivers higher high-speed airflow than the average portable air conditioner (460 m³/h vs 350 m³/h).
    460 m³/h vs 350 m³/h
  • Higher cooling energy efficiency class
    This portable air conditioner has a better cooling energy efficiency class than the average portable air conditioner (A+ vs A).
    A+ vs A
  • 1 dB quieter at maximum output
    This portable air conditioner is quieter at maximum output than the average portable air conditioner (63 dB vs 64 dB).
    63 dB vs 64 dB
  • 2 °C higher minimum temperature
    This portable air conditioner has a higher minimum temperature setting than the average portable air conditioner (18 °C vs 16 °C).
    18 °C vs 16 °C
  • 0.3 m shorter power cord
    This portable air conditioner has a shorter power cord than the average portable air conditioner (1.5 m vs 1.8 m).
    1.5 m vs 1.8 m
  • 31% higher weight
    This portable air conditioner is heavier than the average portable air conditioner (33.4 kg vs 25.5 kg).
    33.4 kg vs 25.5 kg
  • 17 cm taller cabinet
    This portable air conditioner is taller than the average portable air conditioner (88 cm vs 71 cm).
    88 cm vs 71 cm
  • 4 dB louder minimum operation
    This portable air conditioner is louder at minimum output than the average portable air conditioner (55 dB vs 51 dB).
    Lowest stated operating noise.
    55 dB vs 51 dB
  • 10.5 cm deeper cabinet
    This portable air conditioner is deeper than the average portable air conditioner (46 cm vs 35.5 cm).
    46 cm vs 35.5 cm
  • 12 cm wider cabinet
    This portable air conditioner is wider than the average portable air conditioner (50 cm vs 38 cm).
    50 cm vs 38 cm
  • 65.7% more expensive
    Klarstein Grandbreeze Eco is more expensive than the average portable air conditioner (£580 vs £350).
    £580 vs £350
  • 65.7% more expensive
    Klarstein Grandbreeze Eco is more expensive than the average portable air conditioner (£580 vs £350).
    £580 vs £350
  • 19% lower user score
    User score
    6.7/ 10
    ✕
    What it is
    A rating that combines user reviews with the total review volume for products in the Portable Air Conditioners category.
    When it matters
    When you want to know how products in the Portable Air Conditioners category perform in everyday use and how reliable owners find them over time.
    Score distribution
    â–¼
    â–¼
    <55-66-77-88-99-10
    Klarstein Grandbreeze Eco
    the average portable air conditioner
    Klarstein Grandbreeze Eco has a lower user score than the average portable air conditioner (6.72 vs 8.000).
    6.72 vs 8
  • 4.5% worse value for money
    Klarstein Grandbreeze Eco offers worse value for money than the average portable air conditioner (6.82 vs 7.1).
    6.82 vs 7.13
  • 60.8% less popular
    Klarstein Grandbreeze Eco is less popular than the average portable air conditioner (3.73 vs 6).
    3.73 vs 6.01
  • 2 °C higher minimum temperature
    This portable air conditioner has a higher minimum temperature setting than the average portable air conditioner (18 °C vs 16 °C).
    18 °C vs 16 °C
  • 4 dB louder minimum operation
    This portable air conditioner is louder at minimum output than the average portable air conditioner (55 dB vs 51 dB).
    Lowest stated operating noise.
    55 dB vs 51 dB
  • 0.3 m shorter power cord
    This portable air conditioner has a shorter power cord than the average portable air conditioner (1.5 m vs 1.8 m).
    1.5 m vs 1.8 m
  • 31% higher weight
    This portable air conditioner is heavier than the average portable air conditioner (33.4 kg vs 25.5 kg).
    33.4 kg vs 25.5 kg
  • 17 cm taller cabinet
    This portable air conditioner is taller than the average portable air conditioner (88 cm vs 71 cm).
    88 cm vs 71 cm
  • 12 cm wider cabinet
    This portable air conditioner is wider than the average portable air conditioner (50 cm vs 38 cm).
    50 cm vs 38 cm
  • 10.5 cm deeper cabinet
    This portable air conditioner is deeper than the average portable air conditioner (46 cm vs 35.5 cm).
    46 cm vs 35.5 cm
  • 97.2% larger external volume
    This portable air conditioner has a larger external volume than the average portable air conditioner (202400 cm³ vs 102623.4 cm³).
    202,400 cm³ vs 102,623.407656 cm³

Expert reviews

In-depth analysis and verdict from leading tech publications

T
testmagazin.sk
21/07/2022
Summary of the review
Klarstein Grandbreeze Eco mobilná klimatizácia – recenzia

Third-party reviews

Based on ratings from across the web.
Reviews last updated: August 2026 · How we calculate this

What we like about Klarstein Grandbreeze Eco

  • Powerful 12,000 BTU compressor cools down medium to large rooms quickly
  • Highly economical to run due to its energy efficiency class A+ rating
  • Versatile 3-in-1 functionality operating as an air conditioner, dehumidifier, and fan
  • Includes a telescopic exhaust hose and window sealing kit right out of the box
  • Easy to move between rooms thanks to integrated smooth-rolling floor castors
  • Convenient operation via a 24-hour timer, clear LED display, and remote control

What we don't like about Klarstein Grandbreeze Eco

  • Generates significant operational noise like most single-hose portable units
  • Requires proper window positioning and a matching window frame to route the bulky exhaust hose
  • Lacks the advanced Wi-Fi app or smart voice assistant controls found on Grandbreeze 'Smart' models
  • Heavy and large chassis layout takes up notable floor space and requires physical effort to lift

Verdict

The Klarstein Grandbreeze Eco 12K is a versatile 3-in-1 portable air conditioner featuring a powerful 12,000 BTU (3.5 kW) cooling capacity, designed to efficiently cool spaces from 42 to 59 m² with a maximum airflow of 460 m³/h. Operating across a temperature range of 18 to 32 °C, the unit utilizes eco-friendly R290 refrigerant to offer cooling, a fan mode with 4 speeds, and a dehumidifying mode capable of extracting up to 1.35 L/h of moisture. Its primary pros include a highly cost-effective and eco-friendly A+ energy efficiency rating (EER 3.1), user-friendly controls via an LED panel or remote control, and an included window sealing kit alongside built-in castor wheels for easy mobility. However, its main cons are a noticeable operational noise level that peaks between 63.5 and 65 dB, and a typical portable design limitation where the required exhaust hose radiates significant heat during operation.

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