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Klarstein Iceblock Review | 44 Data compared

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  • Avg. price in UK: ~£520
  • Avg. price in US: ~$750
  • Cooling capacity: 12,000 BTU/h
  • Maximum room size: 59 m²
  • Maximum noise level: 65 dB
  • Heating function: no
  • Cooling Energy Efficiency Class: A

Klarstein Iceblock 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.

7.9

Overall score

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 components:

80.0%

7.9

Technical Score

20.0%

?

User score

Very good
7.9

Technical Score

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 components:

55.0%

8.1

Performance

30.0%

7.1

Features

15.0%

8.4

Design

Very good
?

User score

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 components:

70.0%

?

User reviews

30.0%

?

Popularity

  • 6.9
    Bedroom use

    Score components:

    35.0%

    1.0

    Maximum noise level

    25.0%

    10

    Night mode

    20.0%

    10

    Timer

    20.0%

    10

    Remote control

  • 9.7
    Large rooms

    Score components:

    40.0%

    10

    Cooling capacity

    30.0%

    10

    Maximum room size

    20.0%

    8.7

    Airflow (high speed)

    10.0%

    10

    Airflow direction control

  • 4.9
    Year-round use

    Score components:

    40.0%

    4.0

    Heating function

    30.0%

    4.3

    Dehumidification capacity

    20.0%

    8.0

    Cooling energy efficiency class

    10.0%

    4.0

    Automatic fan speed

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Best prices in UK

    N/A~ £520

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 Klarstein Iceblock is a 3-in-1 portable air conditioner, fan, and dehumidifier featuring a powerful 12,000 BTU (3.5 kW) cooling capacity, a 1,345-watt power consumption, and an energy efficiency class A rating utilizing eco-friendly R290 refrigerant. Designed to manage indoor climates in spaces spanning 35 to 59 m², it provides an airflow rate up to 400 m³/h, a 1.2 l/h dehumidifying performance, and an adjustable temperature range of 16 to 31 °C. Its primary advantages include easy DIY installation with an included window sealing kit, a programmable 24-hour timer, a dedicated low-noise sleep mode (down to 52 dB), and smart integration via the Klarstein app compatible with Amazon Alexa and Google Home. However, it can become quite loud at maximum output, reaching noise levels up to 65 dB, and the high-brightness LED control panel can be distracting in dark bedrooms.

Technical Specifications of portable air conditioner Klarstein Iceblock

Technical Score

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 components:

55.0%

?

Performance

30.0%

?

Features

15.0%

?

Design

7.9
Klarstein Iceblock has a technical score of 7.85 points, which is higher than 86.3% 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 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 components:

70.0%

0.0

User reviews

30.0%

1.0

Popularity

?
Popularity
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.
1.0
Klarstein Iceblock has a popularity of 1 points, which is lower than 66.3% of products in this category.
Ratio quality/price

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 components:

60.0%

7.9

Overall score

40.0%

5.8

Price

7.2
Klarstein Iceblock has a quality-to-price ratio of 7.2 points, which is higher than 66.3% of products in this category.
Cooling capacity
What it is: Cooling capacity is the amount of heat the air conditioner can remove per hour, measured in BTU/h.
When it matters: Higher capacity cools larger or warmer rooms more effectively, provided the unit is sized correctly.

Importance: HIGH

Good value: At least 12,000 BTU/h

12,000 BTU/h
Klarstein Iceblock delivers 12000 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
What it is: Rated input power is the electrical power the unit draws at its specified operating point, measured in watts.
When it matters: Lower rated input power reduces electrical demand, though cooling efficiency also depends on delivered capacity.

Importance: HIGH

Good value: Up to 1,200 W

?
Cooling Energy Efficiency Class
What it is: Cooling energy efficiency class summarizes the efficiency of the unit while cooling, from higher to lower letter grades.
When it matters: A higher cooling efficiency class indicates more cooling output for the electricity consumed.

Importance: HIGH

Good value: A or better

A
Klarstein Iceblock has cooling energy efficiency class A, which ranks lower than 10.7% of portable air conditioners and equal to 89.4% of portable air conditioners.
Heating energy efficiency class
What it is: Heating energy efficiency class summarizes energy efficiency when the unit operates in heating mode.
When it matters: A higher heating efficiency class matters when the portable air conditioner will also provide regular space heating.

Importance: LOW

Good value: A or better

?
Number of speeds
What it is: The number of selectable fan speeds determines how finely airflow and noise can be adjusted.
When it matters: More speed settings make it easier to balance cooling intensity, sound, and comfort.

Importance: MEDIUM

Good value: At least 3 speeds

3
Klarstein Iceblock offers 3 fan speeds, which is more than 36.8% of portable air conditioners and equal to 61.1% of portable air conditioners.
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Fan-only mode
What it is: Fan-only mode circulates room air without running the refrigeration cycle.
When it matters: This mode provides lower-power airflow when cooling is unnecessary.

Importance: MEDIUM

Good value: yes

yes
Klarstein Iceblock includes a fan-only mode. 99.5% of portable air conditioners support this mode.
Airflow direction control
What it is: Airflow direction control describes whether outlet air can be aimed automatically, manually, or not at all.
When it matters: Better directional control spreads conditioned air more evenly without repositioning the unit.

Importance: MEDIUM

Good value: automatic

automatic
Klarstein Iceblock 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
What it is: Night mode adjusts operation for sleeping hours, typically reducing sound, light, or abrupt temperature changes.
When it matters: Night mode is useful when the unit runs in a bedroom or other light- and noise-sensitive space.

Importance: MEDIUM

Good value: yes

yes
Klarstein Iceblock includes a dedicated night mode. 74.3% of portable air conditioners offer night mode.
Timer
What it is: A timer lets the unit start, stop, or change operation after a scheduled interval.
When it matters: Timer control helps cool a room before use and avoids running the unit longer than necessary.

Importance: MEDIUM

Good value: yes

yes
Klarstein Iceblock includes a built-in timer. 99.5% of portable air conditioners feature a timer.
Maximum timer duration
What it is: Maximum timer duration is the longest interval that can be scheduled before automatic operation changes.
When it matters: A longer timer window offers more flexibility for overnight use and advance scheduling.

Importance: MEDIUM

Good value: At least 24 hours

24 hours
Klarstein Iceblock 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.
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Color
What it is: Color describes the main exterior finish of the portable air conditioner.
When it matters: Finish color matters when the unit will remain visible and should suit the room decor.

Importance: LOW

white
Display
What it is: A display shows settings such as target temperature, operating mode, or timer status on the unit.
When it matters: A display makes current settings easier to check without opening an app or using the remote.

Importance: LOW

Good value: yes

yes
Klarstein Iceblock includes an integrated display. 99.5% of portable air conditioners feature a display.
Control type
What it is: Control type identifies whether settings are entered through touch controls, physical buttons, or both.
When it matters: The interface style affects tactile feedback, cleaning, accessibility, and ease of use.

Importance: LOW

touch
Remote control
What it is: A remote control operates core functions from across the room without touching the unit.
When it matters: Remote access is convenient when the air conditioner is beside a window, across the room, or used from bed.

Importance: LOW

Good value: yes

yes
Klarstein Iceblock comes with a remote control. 99% of portable air conditioners include a remote.
Handles
What it is: Integrated handles provide secure grip points for moving or repositioning the unit.
When it matters: Handles reduce awkward lifting when the air conditioner is moved between rooms or stored.

Importance: LOW

Good value: yes

yes
Klarstein Iceblock includes built-in handles for easier carrying. 99.5% of portable air conditioners feature handles.
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Klarstein Iceblock vs the average portable air conditioner

  • 3000 BTU/h higher cooling capacity
    Klarstein Iceblock delivers higher cooling capacity than the average portable air conditioner (12000 BTU/h vs 9000 BTU/h).
    What it is: Cooling capacity is the amount of heat the air conditioner can remove per hour, measured in BTU/h.
    When it matters: Higher capacity cools larger or warmer rooms more effectively, provided the unit is sized correctly.

    Importance: HIGH

    Good value: At least 12,000 BTU/h

    Klarstein Iceblock delivers higher cooling capacity than the average portable air conditioner (12000 BTU/h vs 9000 BTU/h).12000 BTU/h vs 9000 BTU/h
  • 29 m² larger room coverage
    Klarstein Iceblock covers a larger room area than the average portable air conditioner (59 m² vs 30 m²).
    What it is: Maximum room size is the largest floor area the manufacturer recommends the unit should cool.
    When it matters: A larger rated area is important when cooling open-plan spaces or larger rooms.

    Importance: HIGH

    Good value: At least 30 m²

    Klarstein Iceblock covers a larger room area than the average portable air conditioner (59 m² vs 30 m²).59 m² vs 30 m²
  • 50 m³/h higher high-speed airflow
    Klarstein Iceblock delivers higher high-speed airflow than the average portable air conditioner (400 m³/h vs 350 m³/h).
    What it is: High-speed airflow is the maximum volume of air the fan can move per hour.
    When it matters: Higher maximum airflow circulates cooled air through the room more quickly.

    Importance: HIGH

    Good value: At least 350 m³/h

    Klarstein Iceblock delivers higher high-speed airflow than the average portable air conditioner (400 m³/h vs 350 m³/h).400 m³/h vs 350 m³/h
  • 3% better value for money
    Klarstein Iceblock offers better value for money than the average portable air conditioner (7.24 vs 7.026).
    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.
    Klarstein Iceblock offers better value for money than the average portable air conditioner (7.24 vs 7.026).7.24 vs 7.03
  • 0.5 cm shallower cabinet
    Klarstein Iceblock is shallower than the average portable air conditioner (35 cm vs 35.5 cm).
    What it is: Depth is the front-to-back cabinet dimension of the portable air conditioner.
    When it matters: A shallower unit protrudes less into the room and leaves more usable floor space.

    Importance: LOW

    Good value: Up to 35 cm

    Klarstein Iceblock is shallower than the average portable air conditioner (35 cm vs 35.5 cm).35 cm vs 35.5 cm
  • 3000 BTU/h higher cooling capacity
    Klarstein Iceblock delivers higher cooling capacity than the average portable air conditioner (12000 BTU/h vs 9000 BTU/h).
  • 29 m² larger room coverage
    Klarstein Iceblock covers a larger room area than the average portable air conditioner (59 m² vs 30 m²).
  • 50 m³/h higher high-speed airflow
    Klarstein Iceblock delivers higher high-speed airflow than the average portable air conditioner (400 m³/h vs 350 m³/h).
  • 0.5 cm shallower cabinet
    Klarstein Iceblock is shallower than the average portable air conditioner (35 cm vs 35.5 cm).

Total
Overall
Performance
Design
  • No automatic fan-speed control
    Klarstein Iceblock does not adjust fan speed automatically, while the average portable air conditioner does.
  • 2 °C lower maximum temperature
    Klarstein Iceblock has a lower maximum temperature setting than the average portable air conditioner (30 °C vs 32 °C).
  • 1 dB louder at maximum output
    Klarstein Iceblock is louder at maximum output than the average portable air conditioner (65 dB vs 64 dB).
  • 1 dB louder minimum operation
    Klarstein Iceblock is louder at minimum output than the average portable air conditioner (52 dB vs 51 dB).
    Lowest stated operating noise.
  • 3.6 l/24 h lower dehumidification capacity
    Klarstein Iceblock offers lower moisture removal than the average portable air conditioner (28.8 l/24 h vs 32.4 l/24 h).
  • 25.5% higher weight
    Klarstein Iceblock is heavier than the average portable air conditioner (32 kg vs 25.5 kg).
  • 3.5 cm taller cabinet
    Klarstein Iceblock is taller than the average portable air conditioner (74.5 cm vs 71 cm).
  • 4 cm wider cabinet
    Klarstein Iceblock is wider than the average portable air conditioner (42 cm vs 38 cm).
  • 6.7% larger external volume
    Klarstein Iceblock has a larger external volume than the average portable air conditioner (109515 cm³ vs 102623.407656 cm³).
  • No automatic fan-speed control
    Klarstein Iceblock does not adjust fan speed automatically, while the average portable air conditioner does.
    What it is: Automatic fan speed lets the unit adjust airflow without manual speed changes.
    When it matters: Automatic adjustment improves convenience and can maintain a steadier room temperature.

    Importance: LOW

    Good value: yes

    Klarstein Iceblock does not adjust fan speed automatically, while the average portable air conditioner does.
  • 2 °C lower maximum temperature
    Klarstein Iceblock has a lower maximum temperature setting than the average portable air conditioner (30 °C vs 32 °C).
    What it is: Maximum set temperature is the highest thermostat target available in the unit controls.
    When it matters: A higher maximum setting provides a broader adjustment range, especially on models with heating.

    Importance: LOW

    Good value: At least 30 °C

    Klarstein Iceblock has a lower maximum temperature setting than the average portable air conditioner (30 °C vs 32 °C).30 °C vs 32 °C
  • 25.5% higher weight
    Klarstein Iceblock is heavier than the average portable air conditioner (32 kg vs 25.5 kg).
    What it is: Weight is the mass of the portable air conditioner before installation accessories are attached.
    When it matters: A lighter unit is easier to carry, reposition, and move between floors.

    Importance: MEDIUM

    Good value: Up to 25 kg

    Klarstein Iceblock is heavier than the average portable air conditioner (32 kg vs 25.5 kg).32 kg vs 25.5 kg
  • 1 dB louder at maximum output
    Klarstein Iceblock is louder at maximum output than the average portable air conditioner (65 dB vs 64 dB).
    What it is: Maximum noise level is the loudest stated sound output, usually produced at full cooling or fan speed.
    When it matters: Lower maximum noise makes intensive cooling less disruptive during work, conversation, or sleep.

    Importance: MEDIUM

    Good value: Up to 60 dB

    Klarstein Iceblock is louder at maximum output than the average portable air conditioner (65 dB vs 64 dB).65 dB vs 64 dB
  • 3.6 l/24 h lower dehumidification capacity
    Klarstein Iceblock offers lower moisture removal than the average portable air conditioner (28.8 l/24 h vs 32.4 l/24 h).
    What it is: Dehumidification capacity is the maximum volume of moisture the unit can remove from the air in 24 hours.
    When it matters: Higher capacity is more effective in large, persistently humid, or moisture-prone rooms.

    Importance: HIGH

    Good value: At least 24 l/24 h

    Klarstein Iceblock offers lower moisture removal than the average portable air conditioner (28.8 l/24 h vs 32.4 l/24 h).28.8 l/24 h vs 32.4 l/24 h
  • 48.6% more expensive
    Klarstein Iceblock is more expensive than the average portable air conditioner (£520 vs £350).
    Klarstein Iceblock is more expensive than the average portable air conditioner (£520 vs £350).£520 vs £350
  • 3.5 cm taller cabinet
    Klarstein Iceblock is taller than the average portable air conditioner (74.5 cm vs 71 cm).
    What it is: Height is the vertical dimension of the portable air conditioner.
    When it matters: A shorter cabinet fits more easily below windows, shelves, and other height restrictions.

    Importance: LOW

    Good value: Up to 70 cm

    Klarstein Iceblock is taller than the average portable air conditioner (74.5 cm vs 71 cm).74.5 cm vs 71 cm
  • 6.01x less popular
    Klarstein Iceblock is less popular than the average portable air conditioner (1 vs 6.005).
    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.
    Klarstein Iceblock is less popular than the average portable air conditioner (1 vs 6.005).1 vs 6.01
Total
Overall
Performance
Features
Design

Graphic comparison of Klarstein Iceblock and other products in the Portable Air Conditioners category

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Third-party reviews

What customers like about Klarstein Iceblock?

  • Powerful and effective room cooling capacity (up to 12,000 BTU)
  • Convenient smart home integration via Wi-Fi and the Klarstein mobile app
  • Versatile 3-in-1 functionality operating as an air conditioner, fan, and dehumidifier
  • Smooth mobility facilitated by built-in floor rollers and side handles
  • User-friendly controls featuring a digital display, remote control, and a 24-hour programmable timer
  • Comes equipped with an easy-to-install window sealing kit and exhaust hose

What customers dislike about Klarstein Iceblock?

  • High operating noise levels (up to 65 dB), making it disruptive for light sleepers or bedroom use
  • Bulky, heavy, and physically space-consuming design
  • Inefficiencies inherent to single-pipe systems, where negative pressure can pull warm outside air back into the room
  • Noticeable impact on electricity bills due to high power consumption under continuous maximum load

Expert reviews

T
twofoodiesonaplane.com
18/08/2025
Summary of the review
Living with Klarstein Portable AC in Germany
S
smart-home-fox.de
21/06/2026
Summary of the review
The 5 Best Portable Air Conditioners: Review & Comparison | 2026
(Translated)Show original

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