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Voltman Kub-E 12000 BTU Review | 46 Data compared

Avg. price:~£1,270Cooling capacity:3.5 kWSeasonal cooling efficiency (SEER):?Maximum indoor-unit sound power level:50 dB

Voltman Kub-E 12000 BTU Review: Compare 46 technical specifications and user reviews to see how this product ranks in the Air Conditioners category and whether it is worth buying.

Voltman Kub-E 12000 BTU
7.0/10

Overall score

Score
7.0/ 10
✕
What it is
An overall evaluation of products in the 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 Air Conditioners category.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 83% of models
Score components

80%

7.3

Technical score

20%

5.8

User score

â–¼Worse than 83% of air conditioners
5.2

Value for money

Value for money
5.2/ 10
✕
What it is
An indicator that combines the overall score of products in the Air Conditioners category with their prices.
When it matters
When you are comparing products in the 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 98% of models
Score components

70%

7.0

Overall score

30%

1.0

Price

â–¼Worse than 98%
7.3

Technical score

Technical score
7.3/ 10
✕
What it is
An assessment of technical performance for products in the Air Conditioners category across these key areas: Performance, Features, Design.
When it matters
When you want to compare products in the Air Conditioners category by technical performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 58% of models
Score components

40%

7.0

Performance

40%

8.8

Features

20%

4.8

Design

â–¼Worse than 58%
5.8

User score

User score
5.8/ 10
✕
What it is
A rating that combines user reviews with the total review volume for products in the Air Conditioners category.
When it matters
When you want to know how products in the 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 98% of models
Score components

70%

6.2

User ratings

30%

4.9

Number of reviews

Based on ratings from across the web.
â–¼Worse than 98%
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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 air conditioner Voltman Kub-E 12000 BTU

Technical score
Technical score
7.3/ 10
✕
What it is
An assessment of technical performance for products in the Air Conditioners category across these key areas: Performance, Features, Design.
When it matters
When you want to compare products in the Air Conditioners category by technical performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 58% of models
Score components:

40%

7.0

Performance

40%

8.8

Features

20%

4.8

Design

7.3
User score
User score
5.8/ 10
✕
What it is
A rating that combines user reviews with the total review volume for products in the Air Conditioners category.
When it matters
When you want to know how products in the 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 98% of models
Score components

70%

6.2

User ratings

30%

4.9

Number of reviews

Based on ratings from across the web.
5.8
Popularity
Popularity
4.9/ 10
✕
What it is
An indicator based on the number of reviews received by products in the Air Conditioners category.
When it matters
When you prefer products in the Air Conditioners category that have been chosen and reviewed by many other buyers.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 68% of models
Popularity:
Voltman Kub-E 12000 BTU has a popularity score of 4.9 points, which is higher than 68% of products in this category.
4.9
Value for money
Value for money
5.2/ 10
✕
What it is
An indicator that combines the overall score of products in the Air Conditioners category with their prices.
When it matters
When you are comparing products in the 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 98% of models
Score components:

70%

7.0

Overall score

30%

1.0

Price

5.2
Split configuration
monoblock
Cooling capacity
3.5 kW
Market range: <2.5 kW – >5.5 kW
This air conditioner delivers a cooling capacity of 3.5 kW, which is higher than that of 45.9% of air conditioners and the same as that of 20% of air conditioners.
Indoor-unit capacity configuration
12,000 BTU/h
Seasonal cooling efficiency (SEER)
?
Seasonal heating efficiency (SCOP)
?
Show more
Inverter compressor
yes
Does this air conditioner use an inverter compressor? yes. 12.4% of air conditioners do, while 87.6% do not.
Heating function
yes
Can this air conditioner heat the room? yes. 7.3% of air conditioners can, while 92.7% cannot.
Active air purification
no
Does this air conditioner actively purify the air? no. 27% of air conditioners do not, while 73.1% do.
Dehumidification mode
yes
Does this air conditioner include dehumidification mode? yes. 6.8% of air conditioners do, while 93.2% do not.
Fan-only mode
yes
Does this air conditioner offer fan-only mode? yes. 6.2% of air conditioners do, while 93.8% do not.
Show more
Color
?
Body material
metal
Display
yes
This air conditioner includes a display (yes); 18% of air conditioners do not, while 82% do.
Display position
front center
Physical control methods
remote control
This air conditioner provides remote control physical controls, ahead of 1.1% of air conditioners and equal to 81.5%.
Show more

Voltman Kub-E 12000 BTU vs the average air conditioner

246810TotalPerformanceFeaturesDesign
  • 6 dB lower indoor sound power
    This air conditioner operates with a quieter indoor unit than the average air conditioner (50 dB vs 56 dB).
    50 dB vs 56 dB
  • 9 m² larger room coverage
    This air conditioner covers a larger room area than the average air conditioner (44 m² vs 35 m²).
    44 m² vs 35 m²
  • 4.95x more popular
    Voltman Kub-E 12000 BTU is more popular than the average air conditioner (4.95 vs 1).
    4.95 vs 1
  • 4.95x more popular
    Voltman Kub-E 12000 BTU is more popular than the average air conditioner (4.95 vs 1).
    4.95 vs 1
  • 6 dB lower indoor sound power
    This air conditioner operates with a quieter indoor unit than the average air conditioner (50 dB vs 56 dB).
    50 dB vs 56 dB
  • 9 m² larger room coverage
    This air conditioner covers a larger room area than the average air conditioner (44 m² vs 35 m²).
    44 m² vs 35 m²
  • 5x heavier indoor unit
    This air conditioner has a heavier indoor unit than the average air conditioner (43.5 kg vs 8.7 kg).
    43.5 kg vs 8.7 kg
  • Lower cooling energy class
    This air conditioner has a less efficient cooling energy class than the average air conditioner (A vs A++).
    A vs A++
  • 29.5 cm taller indoor unit
    This air conditioner has a taller indoor-unit height than the average air conditioner (58.5 cm vs 29 cm).
    58.5 cm vs 29 cm
  • 19.5 cm wider indoor unit
    This air conditioner has a wider indoor unit than the average air conditioner (100 cm vs 80.5 cm).
    100 cm vs 80.5 cm
  • 95 m³/h lower indoor-unit airflow
    This air conditioner delivers a lower indoor airflow rate than the average air conditioner (500 m³/h vs 595 m³/h).
    500 m³/h vs 595 m³/h
  • 36.8% worse value for money
    Voltman Kub-E 12000 BTU offers worse value for money than the average air conditioner (5.2 vs 7.1).
    5.2 vs 7.12
  • 2.54x more expensive
    Voltman Kub-E 12000 BTU is more expensive than the average air conditioner (£1,270 vs £500).
    £1,270 vs £500
  • 37.4% lower user score
    User score
    5.8/ 10
    ✕
    What it is
    A rating that combines user reviews with the total review volume for products in the Air Conditioners category.
    When it matters
    When you want to know how products in the 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
    Voltman Kub-E 12000 BTU
    the average air conditioner
    Voltman Kub-E 12000 BTU has a lower user score than the average air conditioner (5.82 vs 8.000).
    5.82 vs 8
  • 36.8% worse value for money
    Voltman Kub-E 12000 BTU offers worse value for money than the average air conditioner (5.2 vs 7.1).
    5.2 vs 7.12
  • 2.54x more expensive
    Voltman Kub-E 12000 BTU is more expensive than the average air conditioner (£1,270 vs £500).
    £1,270 vs £500
  • 37.4% lower user score
    User score
    5.8/ 10
    ✕
    What it is
    A rating that combines user reviews with the total review volume for products in the Air Conditioners category.
    When it matters
    When you want to know how products in the 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
    Voltman Kub-E 12000 BTU
    the average air conditioner
    Voltman Kub-E 12000 BTU has a lower user score than the average air conditioner (5.82 vs 8.000).
    5.82 vs 8
  • Lower cooling energy class
    This air conditioner has a less efficient cooling energy class than the average air conditioner (A vs A++).
    A vs A++
  • 95 m³/h lower indoor-unit airflow
    This air conditioner delivers a lower indoor airflow rate than the average air conditioner (500 m³/h vs 595 m³/h).
    500 m³/h vs 595 m³/h
  • 5x heavier indoor unit
    This air conditioner has a heavier indoor unit than the average air conditioner (43.5 kg vs 8.7 kg).
    43.5 kg vs 8.7 kg
  • 29.5 cm taller indoor unit
    This air conditioner has a taller indoor-unit height than the average air conditioner (58.5 cm vs 29 cm).
    58.5 cm vs 29 cm
  • 19.5 cm wider indoor unit
    This air conditioner has a wider indoor unit than the average air conditioner (100 cm vs 80.5 cm).
    100 cm vs 80.5 cm

Third-party reviews

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

What we like about Voltman Kub-E 12000 BTU

  • No outdoor unit required, making it perfect for apartments, historical buildings, and strict co-ownership regulations.
  • Reversible 4-in-1 system providing cooling, heating, ventilation, and dehumidification.
  • Easy DIY installation that requires no certified refrigeration technician and no refrigerant handling.
  • Smart remote control functionality via Wi-Fi, Tuya app, and smartphone compatibility.
  • Energy-efficient DC Inverter technology that optimizes power consumption.
  • Equipped with a 1000W PTC heating resistor to improve heating performance in extreme cold weather.
  • Features a very quiet Silent Mode suitable for nighttime use in bedrooms.

What we don't like about Voltman Kub-E 12000 BTU

  • Requires drilling two large 180mm core holes through the exterior wall for air intake and exhaust.
  • Heavy wall-mounted unit weighing over 43 kg, requiring sturdy structural support.
  • Can be noticeably loud (up to 58 dB) when running at full power or outside of Silent Mode.
  • Requires proper drainage management for the moisture collected during dehumidification.

Verdict

The Voltman Kub-E 12000 BTU (Model VOM541123) is a wall-mounted monoblock reversible air conditioner and heat pump that delivers 3,500W of cooling capacity and 2,930W of heating capacity, ideal for spaces between 25 and 35 square meters. This 4-in-1 DC Inverter system handles cooling, heating, ventilation, and dehumidification (1 liter/day) with an airflow rate of 520 m³/h, utilizing eco-friendly R290 gas and an integrated 1,000W PTC heating resistor. Its main advantages include a design that requires no external outdoor unit or refrigerant handling, allowing for straightforward DIY setup via two wall punctures, alongside a high heating COP of 3.6 (A+ energy rating) and smart control through Tuya WiFi, Amazon Alexa, or Google Home. However, notable drawbacks include its heavy 49.5 kg weight, low cooling efficiency rating with an EER of 2.6 (Class A), and potential sound levels reaching up to 48 dB (or 58 dB peak power), which can be noticeable despite its 39 dB silent night mode.

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