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Suntec 17353 Coolfixx 3.5 Review | 44 Data compared

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  • Avg. price in UK: ~£450
  • Avg. price in US: ~$430
  • Cooling capacity: 12,000 BTU/h
  • Maximum room size: 60 m²
  • Maximum noise level: 65 dB
  • Heating function: yes
  • Cooling Energy Efficiency Class: A

Suntec 17353 Coolfixx 3.5 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.

7.7

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%

7.0

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%

7.2

Features

15.0%

8.1

Design

Very good
7.0

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%

7.4

User reviews

30.0%

6.1

Popularity

User score:
United Kingdom
amazon
3.7
(47)

(Reviews last updated: August 2026)

Very good
  • 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

  • 7.1
    Year-round use

    Score components:

    40.0%

    10

    Heating function

    30.0%

    3.6

    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

Best rankings

?

Available: ranking among products currently available (including other versions of this product).
All: ranking among all products in the database.

Verdict

The Suntec 17353 Coolfixx 3.5 Eco R290 is a versatile 4-in-1 portable air conditioner designed for rooms up to 60 m² (130 m³), featuring an energy efficiency class A rating, a robust cooling capacity of 12,000 BTU/h (1,540W power consumption), a heating output of 9,500 BTU/h, a dehumidification rate of 1.1 liters per hour, and 3 ventilation settings driving up to 400 m³/h of air circulation. Key performance pros include its eco-friendly R290 refrigerant, a precise manual temperature range of 16–31 °C, full smart integration via the Suntec Wellness app alongside a standard remote control, and a functional 1–24 hour timer combined with a darkened sleep mode. However, notable drawbacks include its substantial weight of 32 kg, a relatively high full-load operating noise level of up to 65 dB, and the mandatory requirement of routing a bulky exhaust hose to an external window for proper cooling functionality.

Technical Specifications of portable air conditioner Suntec 17353 Coolfixx 3.5

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%

7.2

Features

15.0%

8.1

Design

7.9
Suntec 17353 Coolfixx 3.5 has a technical score of 7.85 points, which is higher than 86.8% 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%

7.4

User reviews

30.0%

6.1

Popularity

User score:
United Kingdom
amazon
3.7
(47)

(Reviews last updated: August 2026)

7.0
Suntec 17353 Coolfixx 3.5 has a user score of 7.01 points, which is lower than 86.8% of products in this category.
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.
6.1
Suntec 17353 Coolfixx 3.5 has a popularity of 6.1 points, which is higher than 51.1% 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%

7.7

Overall score

40.0%

6.5

Price

7.3
Suntec 17353 Coolfixx 3.5 has a quality-to-price ratio of 7.3 points, which is higher than 74.2% 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
Suntec 17353 Coolfixx 3.5 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
Suntec 17353 Coolfixx 3.5 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

A
Suntec 17353 Coolfixx 3.5 has heating energy efficiency class A, which ranks lower than 54.2% of portable air conditioners and equal to 45.8% of portable air conditioners.
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
Suntec 17353 Coolfixx 3.5 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
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
Suntec 17353 Coolfixx 3.5 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
Suntec 17353 Coolfixx 3.5 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
Suntec 17353 Coolfixx 3.5 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
Suntec 17353 Coolfixx 3.5 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
Suntec 17353 Coolfixx 3.5 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
Suntec 17353 Coolfixx 3.5 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
Suntec 17353 Coolfixx 3.5 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
Suntec 17353 Coolfixx 3.5 includes built-in handles for easier carrying. 99.5% of portable air conditioners feature handles.
Show more

Suntec 17353 Coolfixx 3.5 vs the average portable air conditioner

  • 3000 BTU/h higher cooling capacity
    Suntec 17353 Coolfixx 3.5 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

    Suntec 17353 Coolfixx 3.5 delivers higher cooling capacity than the average portable air conditioner (12000 BTU/h vs 9000 BTU/h).12000 BTU/h vs 9000 BTU/h
  • 30 m² larger room coverage
    Suntec 17353 Coolfixx 3.5 covers a larger room area than the average portable air conditioner (60 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

    Suntec 17353 Coolfixx 3.5 covers a larger room area than the average portable air conditioner (60 m² vs 30 m²).60 m² vs 30 m²
  • 50 m³/h higher high-speed airflow
    Suntec 17353 Coolfixx 3.5 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

    Suntec 17353 Coolfixx 3.5 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
  • Provides heating
    Suntec 17353 Coolfixx 3.5 provides heating, the average portable air conditioner does not.
    What it is: A heating function reverses or supplements normal operation to warm the room.
    When it matters: Heating extends seasonal usefulness and can replace a separate spot heater in mild weather.

    Importance: LOW

    Good value: yes

    Suntec 17353 Coolfixx 3.5 provides heating, the average portable air conditioner does not.
  • 4.3% better value for money
    Suntec 17353 Coolfixx 3.5 offers better value for money than the average portable air conditioner (7.33 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.
    Suntec 17353 Coolfixx 3.5 offers better value for money than the average portable air conditioner (7.33 vs 7.026).7.33 vs 7.03
  • 3000 BTU/h higher cooling capacity
    Suntec 17353 Coolfixx 3.5 delivers higher cooling capacity than the average portable air conditioner (12000 BTU/h vs 9000 BTU/h).
  • 30 m² larger room coverage
    Suntec 17353 Coolfixx 3.5 covers a larger room area than the average portable air conditioner (60 m² vs 30 m²).
  • 50 m³/h higher high-speed airflow
    Suntec 17353 Coolfixx 3.5 delivers higher high-speed airflow than the average portable air conditioner (400 m³/h vs 350 m³/h).
  • Provides heating
    Suntec 17353 Coolfixx 3.5 provides heating, the average portable air conditioner does not.

Total
Overall
Performance
Features
  • No automatic fan-speed control
    Suntec 17353 Coolfixx 3.5 does not adjust fan speed automatically, while the average portable air conditioner does.
  • 1 dB louder at maximum output
    Suntec 17353 Coolfixx 3.5 is louder at maximum output than the average portable air conditioner (65 dB vs 64 dB).
  • Lower heating energy efficiency class
    Suntec 17353 Coolfixx 3.5 has a lower heating energy efficiency class than the average portable air conditioner (A vs A+).
  • 1 °C lower maximum temperature
    Suntec 17353 Coolfixx 3.5 has a lower maximum temperature setting than the average portable air conditioner (31 °C vs 32 °C).
  • 0.8 dB louder minimum operation
    Suntec 17353 Coolfixx 3.5 is louder at minimum output than the average portable air conditioner (51.8 dB vs 51 dB).
  • 6 l/24 h lower dehumidification capacity
    Suntec 17353 Coolfixx 3.5 offers lower moisture removal than the average portable air conditioner (26.4 l/24 h vs 32.4 l/24 h).
  • 25.5% higher weight
    Suntec 17353 Coolfixx 3.5 is heavier than the average portable air conditioner (32 kg vs 25.5 kg).
  • 9 cm wider cabinet
    Suntec 17353 Coolfixx 3.5 is wider than the average portable air conditioner (47 cm vs 38 cm).
  • 4.5 cm deeper cabinet
    Suntec 17353 Coolfixx 3.5 is deeper than the average portable air conditioner (40 cm vs 35.5 cm).
  • 5 cm taller cabinet
    Suntec 17353 Coolfixx 3.5 is taller than the average portable air conditioner (76 cm vs 71 cm).
  • 39.2% larger external volume
    Suntec 17353 Coolfixx 3.5 has a larger external volume than the average portable air conditioner (142880 cm³ vs 102623.407656 cm³).
  • No automatic fan-speed control
    Suntec 17353 Coolfixx 3.5 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

    Suntec 17353 Coolfixx 3.5 does not adjust fan speed automatically, while the average portable air conditioner does.
  • 25.5% higher weight
    Suntec 17353 Coolfixx 3.5 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

    Suntec 17353 Coolfixx 3.5 is heavier than the average portable air conditioner (32 kg vs 25.5 kg).32 kg vs 25.5 kg
  • 6 l/24 h lower dehumidification capacity
    Suntec 17353 Coolfixx 3.5 offers lower moisture removal than the average portable air conditioner (26.4 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

    Suntec 17353 Coolfixx 3.5 offers lower moisture removal than the average portable air conditioner (26.4 l/24 h vs 32.4 l/24 h).26.4 l/24 h vs 32.4 l/24 h
  • 1 dB louder at maximum output
    Suntec 17353 Coolfixx 3.5 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

    Suntec 17353 Coolfixx 3.5 is louder at maximum output than the average portable air conditioner (65 dB vs 64 dB).65 dB vs 64 dB
  • Lower heating energy efficiency class
    Suntec 17353 Coolfixx 3.5 has a lower heating energy efficiency class than the average portable air conditioner (A vs A+).
    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

    Suntec 17353 Coolfixx 3.5 has a lower heating energy efficiency class than the average portable air conditioner (A vs A+).A vs A+
  • 9 cm wider cabinet
    Suntec 17353 Coolfixx 3.5 is wider than the average portable air conditioner (47 cm vs 38 cm).
    What it is: Width is the side-to-side cabinet dimension of the portable air conditioner.
    When it matters: A narrower unit occupies less wall and floor space beside a window.

    Importance: LOW

    Good value: Up to 35 cm

    Suntec 17353 Coolfixx 3.5 is wider than the average portable air conditioner (47 cm vs 38 cm).47 cm vs 38 cm
  • 4.5 cm deeper cabinet
    Suntec 17353 Coolfixx 3.5 is deeper than the average portable air conditioner (40 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

    Suntec 17353 Coolfixx 3.5 is deeper than the average portable air conditioner (40 cm vs 35.5 cm).40 cm vs 35.5 cm
  • 1 °C lower maximum temperature
    Suntec 17353 Coolfixx 3.5 has a lower maximum temperature setting than the average portable air conditioner (31 °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

    Suntec 17353 Coolfixx 3.5 has a lower maximum temperature setting than the average portable air conditioner (31 °C vs 32 °C).31 °C vs 32 °C
Total
Overall
Performance
Features
Design

Graphic comparison of Suntec 17353 Coolfixx 3.5 and other products in the Portable Air Conditioners category

Attribute category
Attribute
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Third-party reviews

United Kingdom
amazon
3.7
47 Reviews

(Reviews last updated: August 2026)

What customers like about Suntec 17353 Coolfixx 3.5?

  • Powerful 12,000 BTU cooling capacity suitable for medium to large rooms up to 60 m²
  • Versatile 4-in-1 functionality that cools, heats, dehumidifies, and ventilates
  • Convenient smart ecosystem integration with Wi-Fi control via a smartphone app and a remote control
  • Eco-friendly operation utilizing sustainable R290 refrigerant
  • Solid build quality and good overall value for the price ratio

What customers dislike about Suntec 17353 Coolfixx 3.5?

  • High operational noise levels reaching up to 65 dB, which users report can disrupt sleep or watching television
  • Noticeably louder operation specifically when using the heating function
  • Bulky and heavy footprint weighing approximately 32 kg, making it hard to move between floors
  • Mixed user feedback regarding long-term durability and the product's lifespan
  • Requires proper management of the heavy exhaust hose and window sealing kit to remain efficient

Expert reviews

D
darty.com
12/10/2023
Summary of the review
Suntec Wellness CoolFixx Portable Air Conditioner (Hot & Cold) Review
(Translated)Show original

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