Klarstein Kraftwerk Smart 10K
(16 reviews)
A connected portable air conditioner that cools fast: 10,000 BTU, WiFi app control, works with Alexa and Google Home, claimed setup in under 5 minutes.
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Key features
- Power: 2.9 kW (10,000 BTU)
- Connectivity: WiFi, Klarstein app, works with Alexa and Google Home
- Noise level: 48 dB(A) minimum claimed, 55 to 62 dB(A) measured in real use
- Rated 5/5 by an independent test: a 25 m² room cooled by 3°C in 48 minutes
In detail: Klarstein Kraftwerk Smart 10K, connected portable air conditioner 10000 BTU
The Klarstein Kraftwerk Smart 10K is a 3-in-1 portable air conditioner (cooling, ventilation, dehumidifying) rated at 2.9 kW (10,000 BTU), energy class A, that leans on connectivity to stand out: WiFi control through the Klarstein app, compatibility with Amazon Alexa and Google Home for voice control, alongside the supplied physical remote. The claimed 440 m³/h airflow and a temperature range of 18 to 32°C adjustable in 1°C steps allow precise settings depending on needs.
An independent test (maison-et-bricolage.fr), carried out on a 25 m² room, awards it the maximum score of 5/5, particularly praising its cooling speed (a measured 3°C drop in 48 minutes) and how simple it is to set up, in under 5 minutes thanks to the supplied window kit. The unit also includes a 1 to 24 hour programmable timer and 3 fan speeds, for flexible use depending on the time of day.
The R290 refrigerant, more environmentally friendly than traditional gases, equips the unit, whose weight of about 26 kg and dimensions of 35.5 x 82 x 38 cm sit within the average for its category. The roughly 150 cm exhaust hose (15 cm diameter) allows flexible positioning relative to a window.
Noise level is the main thing to watch: while the manufacturer states a minimum of 48 dB(A), the same independent test measures 55 to 62 dB(A) at 1-3 metres from the unit, including in night mode, a level that stays audible and isn't ideal for light sleepers right next to the unit. The relatively short power cord (1.5 m) and the missing CR2032 batteries needed for the remote are other minor practical points to plan for. For daytime use in an office or living room, the Kraftwerk Smart 10K remains a solid, well-connected choice at a reasonable price.
Technical data
Detailed characteristics (EAN: 4060656225666)
Performance
| Type?General technical category the unit belongs to (portable, split, evaporative...). | Monobloc portable, with exhaust hose |
|---|---|
| Cooling capacity?The unit's cooling power, expressed in kW or BTU/h (British Thermal Unit per hour). | 2.9 kW (10,000 BTU) |
| Energy class?European energy efficiency class (from A+++ to G), showing how the unit's consumption compares with similar models. | A |
| Airflow?Volume of air moved by the unit each hour, in m³/h: the higher it is, the faster the room's air is refreshed. | 440 m³/h |
| Noise level?Noise emitted by the unit, in decibels (dB(A)). As a reference, a normal conversation is around 60 dB(A). | 48 dB(A) (minimum claimed) to 65 dB(A) (maximum); an independent test measures 55 to 62 dB(A) at 1-3 m in real use |
| Power draw?Electrical power drawn by the unit while running, expressed in watts (W). | 1,120 W |
| Dehumidifying?Amount of water removed from the air by the unit, usually expressed in litres per 24 hours. | 2.3 to 2.5 L/h according to the manufacturer and retailers (an isolated figure of 23 L/h also circulates but seems inconsistent with the unit's size) |
| Refrigerant?Gas used in the cooling circuit. R290 and R32 are now favoured for their lower environmental impact. | R290 |
Features and connectivity
| Functions?Operating modes offered by the unit (cooling, fan, dehumidifying, heating...). | Cooling, ventilation, dehumidifying (3-in-1) |
|---|---|
| Exhaust hose length?Length of the hose venting hot air outside, usually through a partly open window. | About 150 cm |
| Exhaust hose diameter?Length of the hose venting hot air outside, usually through a partly open window. | 15 cm |
| Connectivity?Ways to control the unit remotely (mobile app, WiFi, voice assistants...). | WiFi, Klarstein app, works with Amazon Alexa and Google Home |
| Features?Operating modes offered by the unit (cooling, fan, dehumidifying, heating...). | 1 to 24h timer, 3 fan speeds, remote control (CR2032 battery not included) |
Dimensions and power supply
| Temperature range?Minimum and maximum temperatures the unit can be set to. | 18 to 32°C, adjustable in 1°C steps |
|---|---|
| Weight?The unit's weight, an important factor for a portable air conditioner regularly moved between rooms. | About 26 kg |
| Dimensions?Width, depth and height of the unit (W x D x H). | 35.5 x 82 x 38 cm |
| Power supply?Electrical voltage and frequency required to run the unit. | 220-240V~, 50-60Hz |
Additional information
| Warranty?Period during which the manufacturer commits to repairing or replacing the unit in case of failure, excluding damage or misuse. | 2 years |
|---|
Comparison
In a similar price bracket (£250 to £500), the Klarstein Kraftwerk Smart 10K regularly comes up against the Comfee Breezy Cool 2.6, another connected portable air conditioner, in searches like "Klarstein vs Comfee air conditioner". Here is how the two compare, based on the public specifications of both manufacturers.
| Criterion | Kraftwerk Smart 10K | Comfee Breezy Cool 2.6 |
|---|---|---|
| Cooling capacity | 2.9 kW (10,000 BTU) | 2.6 kW (9,000 BTU) |
| Airflow | 440 m³/h | 338 m³/h |
| Connectivity | WiFi, Klarstein app, Alexa, Google Home | WiFi, MSmart Home app, Alexa, Google Home |
| Noise level | 48 to 65 dB(A) | 53 to 64 dB(A) |
| Price observed | ≈£459 | ≈£260 |
In short, the Kraftwerk Smart 10K offers slightly higher power and airflow, at a notably higher price than the Comfee Breezy Cool 2.6. Both share comparable connectivity (WiFi, Alexa, Google Home) and a similar noise level: the choice mostly comes down to available budget versus the need for extra power.
Related video
Video: Que vaut le climatiseur mobile Klarstein Kraftwerk Smart ? Le test ! - Published on 1 August 2023
Our tester's verdict: Christophe Delpuech
The independent test we were able to review (maison-et-bricolage.fr), carried out on a 25 m² room, sets the tone: the Kraftwerk Smart 10K cools quickly and effectively, with a measured 3°C drop in 48 minutes, and a maximum score of 5/5 from this reviewer. Setup, claimed to take under 5 minutes, matches what most buyers report, window kit included. Control through the Klarstein app works properly, with Alexa and Google Home compatibility a nice bonus for a unit at this price point. The downside most consistently mentioned is noise level: the same test measures 55 to 62 dB(A) at 1-3 metres from the unit, a figure well above the 48 dB(A) minimum stated by the manufacturer, which, in real bedroom use, doesn't suit every light sleeper, with several reviews outright advising against prolonged nighttime use right next to the bed. Other minor practical gripes: a power cord seen as a touch short (1.5 m) and a remote supplied without its CR2032 batteries. For quickly cooling a daytime room, office or living room, the performance-to-price ratio remains solid; for a bedroom, it's better to keep it away from the bed or accept a trade-off on night-time quiet.
Frequently asked questions: Klarstein Kraftwerk Smart 10K, connected portable air conditioner 10000 BTU
With some caution: an independent test measures 55 to 62 dB(A) at 1-3 metres from the unit, well above the 48 dB(A) minimum stated by the manufacturer, which can disturb light sleepers if the unit is placed too close to the bed. It's better suited to daytime use in an office or living room.
Once connected over WiFi through the Klarstein app, the unit can be adjusted remotely from a smartphone and controlled by voice thanks to its compatibility with Amazon Alexa and Google Home.
An independent test claims setup in under 5 minutes thanks to the supplied window kit, matching what most buyer reviews report for a standard window.
No, the remote runs on a CR2032 battery that isn't included in the box, a practical detail worth planning for before first use.
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Page published on 31 July 2026