Dehumidifier Rohnson R-9920 Genius 20 with a power of 320 Watts, ideal for spaces up to 120m2, featuring an advanced dehumidification system, capable of collecting 20 liters of moisture per 24 hours, powerful dual ionization system, UV-C lamp, remote operation via Wi-Fi, and optional HEALTH KIT HEPA 13+Activated Carbon filter for clean air and unwanted odors.
Ultraviolet lamp type C (UV-C) for sterilization
The Ultraviolet UV-C lamp contains the appropriate amount of energy to "break" the molecular structure of microorganisms. It manages to neutralize the viral and bacterial infectious load of the air, thus offering an absolutely hygienic atmosphere in your space.
Dual Ionization System and HEPA 13 Filter for Clean Air
It features a dual ionization system, with a dual ionization pin and a carbon air filter, to sterilize and remove unwanted odors from the space. It absorbs aromatic compounds and chemicals at a molecular level. This filter effectively cleans the ambient air, especially cigarette smoke, fireplace ash, etc. Additionally, the optional HEPA13 + Activated Carbon air filter removes over 99.7% of particles, preventing them from recirculating in the air.
Innovative Air Blade Design
The specialized design of the air impeller in three levels offers a high rate of moisture absorption very quickly and over large surfaces.
Special soundproofing materials
The special soundproofing materials that the device features isolate unpleasant sounds, offering particularly low noise levels. Select the low-speed fan setting and the dehumidifier will operate at the lowest noise levels exactly when necessary. It is ideal for use in rooms during nighttime to enjoy the best conditions even while you sleep.
Clothes Drying
Place the drying rack with the wet clothes that have just been washed in a room. Let the Rohnson dehumidifier dry them quickly, economically, and effectively. The clothes dry, giving them a sense of freshness, while the space remains free from annoying humidity and unwanted odors.
Large Water Tank 6.5 Liters
The largest 6.5-liter water tank ever in a dehumidifier. It offers greater autonomy and ensures continuous operation of the device for many hours.
Ambient light indicator
Three different light indicators for each humidity level (Green, Blue, Red).
Large air supply 195 m3/h for more effective dehumidification
The Rohnson R-9920 Genius 20 dehumidifier features a large air supply for more efficient and economical dehumidification.
Two fan speeds for smoother airflow
The ergonomic air design combined with the choice of 2 fan speeds offers the ideal airflow in the space.
Low power consumption
Reduce costs and make the smart move with a Rohnson R-9920 Genius 20 dehumidifier.
Advanced Genius WI-FI Technology
Keep the ideal conditions of humidity, temperature, and clean atmosphere in your hands while saving money and energy. No matter where you are, get informed and set the ideal temperature and humidity levels in your space with the advanced Genius 20 technology. Download the Rohnson app for free via Google Play or App Store and create the environment you want for you and your family. The Rohnson app features unique advanced functions, high-tech, so you can enjoy the benefits of a modern dehumidifier in your space, no matter where you are.
Share the Genius 20 experience with Wi-Fi usage
Through the application, you can enable the use of the dehumidifier for up to 3 additional users-family members and share the Genius 20 experience.
Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can
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Good dehumidifier, noisy for bedrooms at night. It also emits cold air. Less noisy on the lower setting.
When the air purification is activated, the dehumidification stops. The Ionizer and UV lamp are always activated as described in the instructions, but they are invisible to us!!
Huge 6-liter water tank takes at least 2 days to fill. The second largest water tank after the combo inventor. Great convenience and the tank is also high-quality and ergonomic with a handle. Heavy for elderly individuals when it is full.
Elegant, high-quality, rotating.
Rohnson r-9920 genius Wi-Fi dehumidifier application. In the cycle, when the application is open, the humidity percentage for adjustment does not appear, instead, two dashes - - appear.
Also, I do not see a setting for UV-C in the application, only an 'air clean' button which, when activated, deactivates the dehumidification!!!! The application has deficiencies in its functionality. Is there any problem?
Nice construction, only if it doesn't fit well, it creaks. The noise is quite annoying. It reminds me of a 90s air conditioner. It's difficult to sleep with the device on.
Good morning,
I bought the Rohnson 9920 yesterday because of its 320 watts and large water tank. Yesterday, when I turned it on at 17:00 and checked the power consumption meter, I saw that it does not exceed 230 watts. I should note that the meter is highly accurate and has been tested with many devices.
Nevertheless, from yesterday at 17:00 until now at 05:48, it has managed to reduce the humidity in a 40 sqm space by only 8 degrees, from 66 to 58, with a room temperature of 19 degrees. I spoke with the store where I purchased it as well as with the manufacturer (they haven't responded yet), and the company that supplied it told me to come and give me another one on Monday in case I received a faulty one. After the replacement, I will measure the power consumption again, and if it still shows 230 watts instead of the advertised 320 watts, then it's not worth it. For the same price, the inventor eva ii pro is available, which I have and it is excellent, just with a smaller tank.
It also mentions a UV lamp, but even in complete darkness, I couldn't see anything shining inside, except for the green indicator in the front that shows the humidity level.
Translated from Greek ·
Water container size
Material quality
Is it economical in electricity consumption?
Moderate noise
Humidity control
Value for money
Did you find this review helpful?
Brand reply:
Αγαπητέ καταναλωτή,
Ευχαριστούμε για το σχόλιο αναφορικά με την εμπειρία σας αναφορικά το με προϊόν που προμηθευτήκατε.
Θα θέλαμε να σας ενημερώσουμε ότι το όργανο μέτρησης ρεύματoς , βλέπει την στιγμιαία κατανάλωση ρεύματος και όχι τις μέγιστες τιμές που είμαστε υποχρεωμένοι να αναφέρουμε σαν εισαγωγείς στο ταμπελάκι της συσκεύής.
Για παράδειγμα η κατανάλωση ρεύματος της συγκεκριμένης συσκευής είναι 320W με 27°C και ποσοστό υγρασίας 60%.Αυτές είναι μέγιστες τιμές που δεν υπάρχουν στο χώρο σας την στιγμή της μέτρησης. Συνεπώς η κατανάλωση ρεύματος στιγμιαία είναι μικρότερη από την μέγιστη αναγραφόμενη.
Διαθέτουμε πιστοποιητικά από τα πιο έγκυρα εργαστήρια πιστοποίησης παγκοσμίως την TUV !
Επίσης η λάμπα UV δεν πρέπει να έρχεται σε επαφή με ανθρώπινο μάτι για λόγους ασφαλείας και γι αυτόν δεν είναι εφικτό να έχετε οπτική επαφή
Είμαστε στην διάθεση σας να επικοινωνήσετε και απ ευθείας με την εταιρία ΒΑΣΙΛΗΑΣ Α.Ε για να ζητήσετε να μιλήσετε με τμήμα Marketing για οποιαδήποτε διευκρίνηση
It is efficient, has good construction, and its container is very large. However, it is not quiet in any case. I operate it daily during hours when I am not at home.
Translated from Greek ·
Humidity control
Water container size
Material quality
Value for money
Is it relatively economical in electricity consumption?
Not that it's necessary, but it cannot connect to wifi since it exclusively requires 2.4 GHz. It's ancient, basically. Other than that, it works very well.
It seems to do the job and the first impressions are very good. Just be aware that it is not as quiet as it claims to be, it makes a sound like a refrigerator (compressor) + fan. You definitely can't sleep next to it, but if it's in another room and you're not very sensitive to sounds, it's okay.
By far the best dehumidifier. Firstly, it has the largest tank available, 6 liters, and believe me, this makes a difference. Secondly, it is the most complete, with an ionizer, UV sterilization, and WiFi. The last one is not a joke, you can program it to work during off-peak hours and solve the issue of usage cost. Thirdly, it has a 5-year warranty from the company, which was impeccable when I needed it. For me, the second of the two identical machines I have was a replacement for an older model that broke down after 3 years of daily use due to the power company... It's not silent, but no one is in full operation. However, it doesn't bother your ears either...
I have had the dehumidifier in my possession since December, and I am very satisfied with its use. It lowers the humidity very quickly, and with the use of Wi-Fi, it becomes a breeze. The large tank has saved me, I truly forget to empty it.
Very quiet. Solid construction immediately removed the humidity. Although the meter reads 69 and the air conditioner read 80. I will come back with a newer evaluation
The worst electrical device I have ever purchased. It cannot remove humidity. Another type of Rohnson dehumidifier, much smaller in size, immediately removes humidity in the same space. It is noisy and shakes. Failed purchase. Stay away.
Translated from Greek ·
Water container size
Material quality
Is it relatively economical in electricity consumption?
To dry the clothes, it should be in a closed room, not in a more open space. Generally, though, for its price, it has done what we expected. It is NOT quiet
Perhaps the best purchase I have made for my home. The house is about 80 square meters and is located in front of the sea.
I have been using the dehumidifier for 10 days now. The humidity before I bought it was at 75%. On the first day, it worked continuously for about 9 hours with the fan speed set to high until it lowered the humidity to the 50% that I had set. Now it easily keeps the humidity below 50% and operates for a total of 3-4 hours throughout the day with the fan speed set to low.
It is not very quiet, especially when it is running at full speed, but I consider it reasonable for a device that blows air. Personally, it doesn't bother me.
The water tank is quite large and you actually forget to empty it.
The connection to Wi-Fi is very easy and works flawlessly. The app is not anything extraordinary, but it has several functions such as a timer and presets for automatic dehumidification.
I have the dehumidifier in the kitchen and there is a slight difference of 3-4% with the living room and bedrooms, but I consider it completely normal.
The build quality is excellent, sturdy construction without any creaking in the plastic parts.
The activated carbon filter is not included, you have to buy it separately and it costs 20 euros.
The ionizer eliminates various odors and freshens the atmosphere.
An exceptional device, I am really very satisfied.
I mainly got it for the container, which is huge. My apartment is 55 square meters, and I needed something bigger and more efficient than the previous one, due to the dryer, cooking, and bathroom. Overall, it is good. Some observations I have to make are the following. Its hygrometer does not work well. It shows quite large differences compared to another one I have at a distance of 4 meters, like 10% difference sometimes. As a result, I have set it to 55% desired humidity, and it has gone up to 67% in the room and has not started. This annoys me quite a bit. Its app, ok, you can control it remotely, but it does not show you the actual humidity of the room according to the above. Just a simple app. I would like it to have Alexa skill so that I can create a scenario for it to trigger with the WiFi hygrometer I have, which works correctly but unfortunately it does not have. It is a quite quality construction though. It is not a bad purchase. Just for the huge container alone, I would prefer it over others.
In no case is it silent, as stated in the description.
The construction is mediocre, (it is evident in the quality of its plastics).
We bought it for its silence, and it is not.
Also, it slightly trembles during its operation.
In the positives:
- Large bin! A big enough bin to forget to empty it.
- Removes moisture where it should.
- Wheels for easy transportation within the house.
In the negatives:
- You can't exactly call it silent, but not terribly noisy either.
I did not try the ionizer.
Translated from Greek ·
Humidity control
Water container size
Material quality
Value for money
Moderate noise
Is it relatively economical in electricity consumption?
Very good construction. One thing I will tell you....... my husband accidentally dropped it on it at night (he didn't see it), the machine took a strong hit (my heart skipped a beat at night) but it continues to work flawlessly.
As for dehumidification, we are next to the sea, it reduces it to 55%. I have it on almost all day.
I put it in the bathroom, every time I take a bath and within an hour it doesn't leave a single drop.
At night, you can't have it in the room, you will wake up with a headache. Basically, no matter what you buy, it will make the same noise, since it operates with a fan.
I don't know what to expect from the dehumidifier as I didn't have any other experience. It definitely does the job for which it was purchased, although it doesn't lower the humidity particularly quickly (55 sq.m.). It needs to work all day to reach 55%.
It makes noise within reasonable limits, sometimes it bothers, other times not so much. It's difficult to sleep with the dehumidifier on, though. The ionizer should do something as well, but I didn't see any significant difference.
The container is huge, I empty it twice a week, maybe even less frequently, and the mobile app is amazing. Overall, it's a decent purchase.
I have had it for a year, without any previous experience with another dehumidifier, I am completely satisfied! Last year I moved and the house had a lot of humidity, with the walls dripping, but with the dehumidifier we calmed down!
Perfect construction! Knock on wood, I don't want to jinx it! The humidity levels here in Lemnos, specifically in Kaspaka, are extremely high. So far, it seems to be doing its job and more. Easy to connect to Wi-Fi, and even my grandma can set it up...
Already the owner of a second Inventor Eva II pro dehumidifier. The differences are chaotic. The build quality of the Rohnson is unacceptable. There are holes in the plastic body that look like they were cut by hand. All the buttons (water drawer and filter cover) have a vague feeling, and the joint points do not align in almost any point, a sample of low quality. Upon startup, the fan almost always produces a metallic sound, which stops with a slight movement of the dehumidifier. As for the functions: The ionizer does not work parallel to the dehumidification (a big negative). The "automatic" mode is not automatic, but continuous. In drying mode, the Inventor of the same nominal performance has noticeably faster results.
In a 59 sqm house with humidity at 70-80%, it brings it down to 50-55% in a few hours. When used for drying clothes, the whole house smells like fabric softener as if you opened a bottle and poured it on the walls. If you use the ionizer, in 60 minutes it truly eliminates even the slightest odor and the space feels different as soon as you enter, it's indescribable. In the bedroom, even during sleep mode, I have an issue with the noise it makes, but it doesn't bother my wife. Lastly, it also helps with the room temperature, lowering it by 1-2 degrees. It truly is one of the best purchases one can make for a dehumidifier. I no longer wake up with a headache every morning and my joint pain from the humidity is gone. Our bedsheets are not damp and the house feels warmer and fresher, all thanks to a device that consumes 300 watts. It also simultaneously dries our clothes, making them smell like fabric softener, not like a fireplace or gas. In the spring, I will also try the HEPA13 filter for my allergies, which is a huge issue for me, and I go through antihistamines like candy.
So far, I am satisfied with everything. It has fast narration and in terms of ionization function, it cleans the air so well that you feel like you slept in the mountains. I definitely recommend it!
We have had it for 2 years and use it occasionally, when it becomes necessary. It dries wet clothes with autumn temperatures directly from the washing machine in a closed room in 3-4 hours. You can't say it works completely silently, but it is tolerable. The main thing is that it is efficient, meaning it reduces the humidity in a 50 sqm house and the difference is noticeable. You forget to empty the 6.5-liter container. Quality plastics, nothing creaks.
Edit: We are now in the third year, it hasn't made any noise, and we made the mistake of not using the Air Clean function. IT IS THE BEST, especially when you have smoking guests, it literally doesn't smell like smoke at all and it is relatively quiet
Second time I buy it. It is AMAZING. I have it both at home in Piraeus and in Paros. In the high function, it reduces humidity to 55% (from 80-90) in two hours. I would buy it again and again.
+It reduces humidity to the desired level within a few hours in a 70sqm house.
+Large water collection tank.
•Average build quality (the lid does not close properly if the hepa filter is installed).
-It makes noise as loud as an air conditioner in its high mode and in its "quiet" mode, it makes noise like an air conditioner in its medium mode. Therefore, it cannot be considered quiet.
-High electricity consumption compared to the competition.
Very good and reliable. Refreshes the atmosphere. I really never had a dehumidifier before and I saw a crazy difference in levels, dropping it from 70% to 50%! However, the only drawback is that it definitely is not 37db as mentioned. Nevertheless, it is value for money, the 5-year warranty is without any requirement for service that other manufacturers ask for, and the tank is huge. If some consider the instructions uninterrupted, the service is excellent. They also send a HEPA filter from there with cash on delivery for €20.
The instructions for use are inadequate. I resorted to YouTube for instructions. I understood that those who bought this dehumidifier have the same problem
The review concerns a small apartment in an area with high humidity. Because the apartment is small, it removed the humidity in a few hours and refreshed the atmosphere nicely, even without the Ionizer. Initially, it emitted cold air which became lukewarm once the humidity was gone, and the sensation of temperature increased as if the space had warmed up. The Ionizer helped a lot with cigarette smoke and kitchen odors after frying. The noise is like having the extractor fan on in the small staircase. It doesn't bother us even though the space is small. In a larger apartment, it might not be heard at all depending on its placement. It is quite large in volume, suitable for many square meters. Stylish and modern. So far, I am satisfied.
Quite good so far, I've had it for a week and we've seen a difference. As for the noise that some comments mention, it's fine, especially on the first level, you don't even notice it.