Dehumidifier comparison: effectively reduce humidity!
Dehumidifiers help you to create a good indoor climate. Humidity can be reduced with a dehumidifier.
Humidity is an important value for the indoor climate. It indicates how much water is contained in the air. If there is too much water in the air, this can lead to mould. Too little humidity, on the other hand, can irritate the mucous membranes.
It is always advisable to keep an eye on the humidity level. Corresponding sensors cost no more than an ordinary thermometer.
Multifunctional measuring devices that display humidity and temperature at the same time are recommended. They are priced between €10-20.Relative and absolute humidity
So that no misunderstandings arise in the further course of the article: There is absolute humidity on the one hand, and relative humidity on the other.
With the absolute is the amount of air (usually in grams)that is contained in a certain amount of air (usually one cubic metre). Assume that there are 5 grams of water in every cubic metre of air in a room. Then the absolute humidity corresponds to 5g/m³.
The relative humidity indicates the extent to which the air is saturated with water. That sounds more complicated than it is. Here is the explanation:
Warm air can absorb more water than cold air. If the air is 10°C warm, it can absorb a maximum of approx. 9.5 grams of water per m². If it is 20° warm, it is approx. 17.5 grams [ 1 ] .
If we have a cubic metre of air that is 10°C warm and contains 9.5 grams of water, then the relative humidity is 100%. More water is therefore not possible. If it contains only 5.25 grams of water, the relative humidity is 50%.
In short: The relative humidity indicates the percentage of water saturation in the air.
Recommended dehumidifiers in the test
Now that we've taken a good look at how they work and their additional functions, let's take a look at some recommended products.
I have compiled the following ranking list according to criteria that are as objective as possible. I would like to give you a good overview and make your purchase decision easier.
Pro Breeze dehumidifier 20 litres in 24 hours dehumidification capacity
Advantages
❌ Disadvantages
The Pro Breeze dehumidifier with a dehumidification capacity of 20 litres per day was a real surprise for me - in a positive sense. What at first glance looks like a typical, white household dehumidifier turns out in practice to be a powerful and well thought-out helper against excessive humidity, mould and musty odours.
What struck me immediately was that the appliance is compact and can be moved flexibly around the home thanks to its wheels and carrying handle - be it from the bedroom to the bathroom or, as in my case, to the laundry room. That's where it currently does most of its work and impresses across the board. Despite its rather small dimensions (25 × 39 × 66 cm), it extracts moisture from the air in no time at all. It also ensures faster results when drying laundry - a real plus point in winter or in rainy weather.
Operation is kept simple: You switch on the device, set the desired target value and the Pro Breeze gets to work. The humidity is measured reliably and the LED display provides information about the current status at all times. I particularly like the automatic switch-off when the tank (5.5 litres) is full. Alternatively, you can also connect a drain hose, which makes it a reliable partner for continuous operation - for example during remodelling or construction work.
My practical test showed that the measured values are correct! In comparison with two separate hygrometers, the device's values were usually only off by 1 %. That speaks in favour of a really good internal sensor. In terms of operating noise, the dehumidifier remains pleasantly restrained. Of course, it is not completely silent, but it is perfectly acceptable for living rooms. I wouldn't place it right next to the bed for sleeping, but in closed rooms you can hardly hear it from outside.
One small thing I noticed: the water tank is not so easy to push in and out - it requires a bit of feeling. And in automatic mode, the appliance reacts somewhat sluggishly, which probably has to do with the internal sensor logic. If you want to maintain a constant humidity level, you should operate the appliance manually or with a timer.
What I particularly like is that it is efficient - both in terms of consumption and results. Whether for construction work, in damp cellars or simply to improve the room climate - the Pro Breeze delivers. The solid workmanship, simple operation and, above all, the powerful dehumidification performance make it a real recommendation for me. Absolutely ideal, especially for rooms up to 30 m² (approx. 195 m³).
Comfee dehumidifier 10L/24h, room size approx. 40m³(16m²)
Advantages
❌ Disadvantages
I tested the Comfee 10L/24h dehumidifier in various rooms in my household - from the bathroom to the bedroom to the cellar. Especially in the cold season, when laundry is drying indoors and ventilation is often neglected, the humidity was regularly too high in my home. This is exactly where this appliance comes into its own.
With a dehumidification capacity of up to 10 litres per day, the appliance is ideal for rooms up to around 16 m² (approx. 40 m³). This is also evident in practice: after just 30 to 45 minutes, a noticeable difference in the air quality was noticeable. I was able to significantly reduce the drying time of my hanging laundry, especially in the bathroom.
Operation is intuitive and simple - ideal if you just want a reliable appliance without a lot of bells and whistles. The LED display can be used to set target humidity values between 35 % and 85 %, as well as a timer and various modes. I personally find the reduced menu navigation very pleasant - less is sometimes more.
I was also pleasantly surprised by the mobility of the appliance: castors and a carrying handle make moving it around child's play. One clever detail is the frost protection mode, which switches on automatically and protects the appliance from damage caused by the cold - this was particularly important in an unheated cellar.
However, there are also some minor drawbacks. The operating noise is clearly audible, especially in very quiet rooms. It's not an unpleasant sound - more of a steady hiss - but I wouldn't leave it running in the bedroom at night. The water tank is also relatively small (2 litres), which means that it fills up quickly when the humidity is high and needs to be emptied more often.
Another detail: although there is an automatic switch-off when the target value is reached or the tank is full, there is no simple timer function for "run for x hours and then switch off". That would have been a practical feature.
Despite these minor criticisms, I am very satisfied with the Comfee dehumidifier. It delivers a strong performance, is solidly built and does exactly what it is supposed to do: reliably dehumidify the room air. If you are looking for a simple, effective appliance for typical living spaces, you definitely can't go wrong with this model.
KLAMER dehumidifier electric 20L - 180m³
Advantages
❌ Disadvantages
A big plus is the high air circulation rate of 180 m³/h, which is also reflected in the rapid effect. Rooms are pleasantly dry again within a short time. I was particularly impressed by how efficiently the dehumidifier works when drying laundry. The humidity drops and the laundry dries faster - without any unpleasantly stuffy room air.
The appliance is conveniently mobile. The four castors and practical handle make it easy to move. Despite its power, the KLAMER is comparatively quiet - ideal for daytime use in the living room. However, it is too loud for the bedroom, as many buyers confirm. It is therefore better to switch it off at night.
Operation is intuitive. I particularly like the three-colour LED display for the current humidity status (blue, green, red). The humidity display is also surprisingly precise - compared with an external hygrometer, the values were only around 5 % apart.
One small point of criticism is the position of the water tank: this is located at the back - including the fill level indicator. This makes it a little awkward to use in small rooms, as you may have to turn the appliance to see the water level or remove the tank. You should also make sure to switch off the appliance a few minutes before emptying it, otherwise water may run out.
All in all, the KLAMER dehumidifier is a real workhorse - reliable, cleverly designed and efficient. The workmanship is high quality and the price-performance ratio is absolutely right. If you can live with the rear tank removal, you will get an all-round successful appliance that does its job excellently.
Newentor 20L dehumidifier Electric basement 39dB
Advantages
❌ Disadvantages
The appliance not only works efficiently, but also extremely quietly. At just 39 dB in operation, it is even suitable for sensitive environments such as the bedroom or living room.
The indoor climate improved noticeably after just a few hours. I noticed a significant reduction, especially in the bathroom, where there is often a lot of moisture. The air in the cellar now also feels much fresher and more pleasant. The dehumidifier keeps the humidity constantly at a low level - ideal for mould prevention.
Operation is extremely simple: the touch display is clearly laid out, shows the current humidity and allows precise control of the target values. The 1.5 metre long drain hose supplied is a real convenience plus - so you don't have to keep emptying the tank. Those who still rely on the tank will find a sufficiently large volume and an automatic switch-off function when the tank is full.
The appliance has a modern, high-quality look. It blends unobtrusively into the room, takes up little space and can be moved quickly if necessary. Thanks to its compact construction and sophisticated design, it is suitable for rooms up to 50 m² or 150 m³.
In addition to the performance, the energy efficiency is definitely a highlight: even with regular use, I have not noticed any noticeable increase in my power consumption. The appliance works reliably, efficiently and without any annoying background noise. An all-round successful overall package.
I would also like to emphasise the 10-year guarantee - a strong sign of confidence from the manufacturer. For me, this is a clear plus point and an expression of quality and durability.
Comfee dehumidifier, 30L/24h, room size approx. 180m³(80m²)
Advantages
❌ Disadvantages
The appliance manages to significantly reduce even high humidity levels in a very short time. In damp cellar rooms in particular, you will notice a noticeable difference after just a few hours - not only in the room climate, but also through the disappearance of musty odours.
The operating concept is well thought-out and user-friendly: a clear display shows the current humidity and allows you to set a desired value. The integrated hygrostat regulates the appliance automatically and keeps the selected target humidity constant. In addition to automatic mode, the Comfee also offers continuous operation and a timer function. The large water tank can be easily removed and checked for maintenance - alternatively, it can be permanently drained via a drain hose.
The design is sleek and modern. Thanks to the castors and carrying handle, the appliance is easy to move despite its size. Ideal if you want to gradually dehumidify several rooms.
One point of criticism: in automatic mode, the fan runs continuously, even if the compressor is already switched off. This is technically understandable, as the sensor measures the humidity inside - but it leads to a constant noise level and unnecessary power consumption. If you want to avoid this, you should switch to continuous operation with a timer or an external timer. What's more, the appliance is simply too big and too loud for smaller flats - but it is ideal for cellars, storage rooms or larger living spaces.
Nevertheless, the advantages clearly outweigh the disadvantages: The performance is top, operation is simple and the price-performance ratio is fair. If you want to dehumidify large areas effectively, this model is the right choice.
Bosch Dry 1000 dehumidifier
Advantages
❌ Disadvantages
The Bosch Dry 1000 (or Dry 2000) impressed me right from the start with its efficiency, quiet operation and user-friendly operation. I tested the appliance in various rooms - from the bathroom to the bedroom to the living room - and it reliably and effectively provided a noticeably drier indoor climate everywhere.
The dehumidification performance is strong: within just a few hours, water clearly collects in the 2.5 litre tank - a clear sign of how much moisture was actually present in the room air. The Bosch works quickly and thoroughly, especially in the bathroom or when drying laundry. The laundry dries faster and the room climate remains pleasant.
One of the biggest plus points for me is the Volume - or rather: the lack of it. The Bosch is barely audible in normal mode and even quieter in night mode. Even in the bedroom it does not disturb and can run overnight without any problems. Anyone who is sensitive to noise will love this dehumidifier.
The Operation works via an intuitive touch panel. In addition to automatic mode, a night mode and a special laundry mode are also available. In automatic mode, the appliance adapts to the current humidity level - this saves energy and reduces unnecessary running. The integrated hygrostat regulates precisely and reliably.
Also mobile the appliance cuts a fine figure: thanks to the smooth-running castors, it can be easily moved from room to room. The 2.5 litre tank is sufficient for several hours of operation, but the condensation water can also be drained directly via a hose if required - although the hose could be a little longer.
The Processing is - typically Bosch - high quality. The appliance looks stable, well thought-out and is visually unobtrusive and modern. For me, it is a clear recommendation if you are looking for an appliance that is uncomplicated, quiet and efficient.
Innvitop dehumidifier Electric 12L/24h with digital humidity display
Advantages
❌ Disadvantages
The Innvitop dehumidifier with 12 litres of dehumidification capacity per day has particularly impressed me in small to medium-sized rooms such as the bathroom or bedroom. Despite its compact size, it delivers an amazing performance and manages to dry humid air noticeably and quickly.
The digital humidity display on the appliance provides reliable information about the current room humidity at all times - a practical feature that you wouldn't necessarily expect in this price range. The target values are also easy to set, which makes everyday life much easier. The whole thing is complemented by a timer and a laundry drying function - particularly helpful in the more humid winter months.
The dehumidifier is Pleasantly quiet in operationThe fan is very quiet, sometimes barely audible - even at higher fan speeds, it remains discreetly in the background. This makes it interesting not only for bathrooms and kitchens, but also for living rooms and bedrooms. Although night mode is not explicitly named, it can also be used at night thanks to its low noise level.
Mobility is also a given thanks to the compact dimensions and castors. The water tank of around 1.6 litres is sufficient for the size of the appliance, but can fill up quickly in high humidity. If you need longer running times, simply use the drain hose supplied - a welcome option.
The only point of criticism: The workmanship of the tank seems a little fragile on some models, and there have been a few reports of a grazing fan noise. However, this was not the case with my device - it runs evenly, quietly and reliably.
The bottom line is that with the Innvitop you get a very well-balanced overall package: quiet, compact, with good performance and ideal for smaller rooms - and at a really fair price.
Use of a dehumidifier
The appliance is used in rooms in which the humidity is to be reduced. The dehumidifier requires several hours or days to do this (depending on its own capacity, the size of the room and the water content of the air).
In private rooms, these devices are often used to Room with poor ventilation to dehumidify. Primarily when moisture peaks occur. This happens, for example, when bathing, showering, cooking, drying laundry or exercising.
Larger models are used on construction sites or for dehumidification after water damage. They have a correspondingly higher output and noise level, which is why they are less suitable for private users.
Types and function
There are different technologies that can be used to extract water from the air. Some require a power supply, others do not. The latter require a special filter or granulate. However, the filter or granulate must be replaced at regular intervals.
Dehumidifier with Peltier element
A Peltier element is a very exciting component: if current flows through it, it generates a temperature difference. Conversely, a temperature difference at the element can generate a current flow.
The Peltier element is used for cooling.As mentioned in the section on relative humidity, cold air can hold less moisture than warm air. If the air is cooled by the Peltier element, condensation will form. You can observe the same thing if water condenses on the window panes when cooking or after showering.
The disadvantage of the Peltier element is its lower efficiency (compared to compressor technology). On the other hand, dehumidifiers with a Peltier element are much quieter. They are therefore particularly recommended for use in private rooms.
Dehumidifier with compressor
Dehumidifiers with compressors also cool the air. Only the method of cooling is different. In principle, the cooling method is comparable to that of a refrigerator. A compressor is also installed in a refrigerator. Sometimes you can even hear it humming.
Let's take a look at how cooling works using a compressor. It will be a little technical, but there is a practical summary at the end. Here we go:
In addition to the compressor, the refrigerant is the key component of the cooling system. Just like water, the refrigerant can be gaseous, solid or liquid.
Water freezes from 0°C, evaporates from 100°C and is liquid in between. The refrigerant, on the other hand, evaporates at room temperature.
When a liquid is vaporised, regardless of whether it is water or a refrigerant, it absorbs heat energy. You also have to place a saucepan of water on a hot hob for the water to evaporate.
Conversely, as soon as the vapour becomes liquid again - i.e. condenses - it releases this energy again. And there we have the whole principle:
If we vaporise the refrigerant at one point, it absorbs heat energy from there. We then channel the refrigerant to another point and allow it to condense there. The absorbed heat energy is then released again.So we have transported the heat from one place to another. The place from which we have taken the heat has become colder. Logical, isn't it?
Vaporising the refrigerant is simple. As I said, it already vaporises at room temperature. After the refrigerant has been channelled to another location, it should condense. But how do we do that? Would we have to cool it again?
This is where the compressor comes into play. It compresses the vapour, i.e. increases the pressure. And if the refrigerant is under high pressure, the temperature at which it condenses drops.
Summary of the mode of operation
The dehumidifier with compressor cools the air, which causes the water vapour from the air to condense on the cold cooling device.
A refrigerant is used for cooling, which absorbs heat energy during evaporation and releases it again during condensation. Consequently, the place where the heat energy is absorbed is cooled.
Advantages and disadvantages
Dehumidifiers that work with a compressor are more efficient than models with a Peltier element. They can extract more moisture from the air. Larger models are used for drying on construction sites, for example, and can remove several litres per hour from the air.
The disadvantage is the volume. The appliance emits a humming noise similar to that of a running refrigerator.
Dehumidifier with granulate
Models with granulate collect the moisture in the granulate. The porous and very dry granulate absorbs the water from the air and does not require a fan.
The clear advantage of dehumidifiers that rely on granulate is that they Not tied to a power socket are. However, the granulate can only absorb a certain amount of water before it needs to be replaced.
In terms of price, dehumidifiers with Granules relatively favourable. As no electronics are installed, the price is correspondingly lower. The granules themselves don't cost much either. Depending on the manufacturer, you can get several kilograms for around €10.
This type of dehumidifier is recommended where high humidity only needs to be combated sporadically. If high humidity occurs regularly, then a model with a Peltier element or compressor is more appropriate.
Additional functions
The appliances differ in their dehumidification technology and in the additional functions that simplify their use.
Automatic switch-off
In my opinion, the most necessary additional function is the automatic switch-off. This is because the collected water usually ends up in a container in the appliance. If this is full, the appliance should be able to recognise this and switch itself off.
Larger models are sometimes equipped with a Drain hose equipped. They eliminate the worry of an overflowing water tank. However, they also require some kind of automatic switch-off function:
Dehumidifiers that work with a cooling system must prevent the water from icing up on the heat sink. If the water freezes there, the dehumidifier can no longer work properly. Therefore, either the temperature must be carefully regulated by the appliance or it switches off the cooling at regular intervals to defrost.
Timer
A timer, or a Integrated timer are definitely useful. All you have to do is switch the appliance on and set a time frame. The dehumidifier then switches itself off after the set time.
This can help with short-term peaks in humidity, especially in private households. For example, it could help to switch the appliance on for a certain amount of time after showering. A dehumidifier can also be helpful when drying laundry.
Air filter
As many dehumidifiers have a fan, it makes perfect sense to install an air filter. Appliances with such an air filter dehumidify and purify the air at the same time.
Depending on the filter, various substances such as pollen or Dust filtered out of the room air become.
Humidity display
As mentioned at the beginning; it is essential to keep an eye on the humidity reading. Only then can you use a dehumidifier in a targeted manner. If a corresponding display is installed on the appliance, this will of course help.
Sensor control
Modern models not only measure the humidity, but also react independently on it. If they measure an increased value, they switch on automatically. This function is practical in the kitchen or bathroom, for example. Moisture peaks occur there several times a day, which a dehumidifier with sensor control automatically counteracts.
Purchase criteria for dehumidifiers
After we have looked at the functionality and the possible extras, we derive the most important purchase criteria. Here they are in a nutshell:
- Capacity (litres per hour)
- Size of the collection container
- Energy consumption
- Volume
- Additional functions
- Dimensions
- Design
- Price
Performance
How much water the appliance can collect in a certain time is the most important value for me. After all, I don't want it to run all day, but to make progress in as short a time as possible.
Capacity
So that the Container If the container needs to be emptied, it should be large enough. Specifically, it should be able to hold at least 500ml.
Energy consumption
The Energy consumption determines the operating costs to a large extent. After all, the dehumidifier often runs for several hours. You can use the electricity cost calculator to find out approximately how much it will cost you to operate:
Cost per hour: 0.00 €
Cost per day: 0.00 €
Costs per month: 0.00 €
Costs per year: 0.00 €
Volume
The Volume is particularly important for models that are to be operated in private rooms. A constant humming noise is distracting when working, relaxing and certainly also when sleeping. Before buying, pay attention to the manufacturer's volume specifications. This should be around 40dB.
Additional functions
About which Additional functions The features of the dehumidifier can be a decisive factor in the purchase decision. As already mentioned, displays showing the current temperature and humidity are practical. A timer or sensor control is even better. With the Timer you can specify how long the device should run. One Sensor control measures the humidity itself and switches the dehumidifier on and off automatically.
Dimensions
If the appliance is to be installed in your own four walls, then it is worth considering the Dimensions must be taken into account. Dehumidifiers are generally somewhat bulky. But there are clear differences in size.
Design
The often box-shaped devices are rarely a real feast for the eyes. Therefore, as far as looks are concerned, I recommend as monochrome as possibleinconspicuous housings. White or light grey are ideal here. Flashing displays, convoluted designs or a clunky stand contribute to an unsettling overall impression.
It is better to have a box that is as even as possible, in one colour and can stand flush on the floor and against the wall. If you can also hide unnecessary cable lengths in the appliance, all the better.
Price
Electric dehumidifiers are priced at 50-150€. Models that work with granules are available from around €10.
The price depends on the dehumidification performance as well as the additional functions and the design. We have already looked at the additional functions a dehumidifier can have.
Whether and to what extent the extras justify a surcharge depends on your application. In principle, I wouldn't want to spend more than €200 on a device for a private household. The Lower limit is in my eyes about 40-50€.
Rent a dehumidifier
It is not always necessary to buy a dehumidifier. The purchase costs are relatively high, especially for larger appliances such as construction dryers. However, if the construction dryer is only to be used for a short time, then it is worth hiring it.
My first port of call would be the nearest DIY store choose. It's always a good idea to call first. This may save you a journey or two.
If there is no DIY store in your area that rents out dehumidifiers, you may be able to find one at the Internet. With a bit of luck, you may even find corresponding offers on eBay Classifieds. Advertisements there often have a fair price and contact with the provider is uncomplicated via chat or telephone.
FAQs on dehumidifiers
A dehumidifier removes excess moisture from the room air by drawing in the air and passing it over a cooled surface, causing the water vapour to condense and be collected in a container. The dried air is then released back into the room.
The suitability of a dehumidifier depends on its capacity, which is measured in litres per day. Smaller models are suitable for rooms up to around 20 m², while more powerful appliances can also work efficiently in larger rooms of up to 50 m² or more. Pay attention to the manufacturer's specifications for the maximum room size.
The efficiency of a dehumidifier depends on the room temperature, humidity and the capacity of the appliance. Most appliances work optimally at a room temperature of 20-30 °C. At lower temperatures, efficiency decreases as the air contains less moisture.
Power consumption varies depending on the model and running time. Typical appliances consume between 200 and 600 watts per hour. To minimise energy consumption, it is advisable to only run the dehumidifier until the desired humidity level is reached.
How often the water tank needs to be emptied depends on the room humidity, the capacity of the dehumidifier and the size of the collection tank. As a rule, the container must be emptied every 1-3 days. Some models also offer the option of continuous water drainage so that emptying is not necessary.
Yes, a dehumidifier can reduce the risk of mould growth by lowering the humidity to a healthy level. Mould thrives in humid environments, so a dehumidifier helps to keep the indoor climate dry and therefore mould-free.
A dehumidifier can be useful all year round, especially in humid summer months or in poorly ventilated rooms in winter. During the heating season, it can help to keep the indoor climate comfortable and prevent excessive moisture that could lead to condensation on windows or mould.
Conclusion
Keeping an eye on the indoor climate is always a good thing. If you notice increased humidity, the first thing to do is to Correct ventilation.
But in some rooms this is not always so easy. Be it because there are no windows, No proper draught or simply arises too frequently and too Many moisture peaks (e.g. in the bathroom or kitchen).
To speed up the air exchange, an air filter can be installed in living and working areas. Ceiling fan help. If there are air ducts in the bathroom or kitchen, the typical Bathroom fan can be used to help.
If these options have been exhausted and the desired effect has still not been achieved, a dehumidifier can help. Although it often consumes more energy than fans, it removes moisture effectively.
The opposite of a dehumidifier
If you want to increase the humidity rather than reduce it, there is also a suitable appliance class for this:
Diffuser
Recommended diffusers and how you can use them to improve the indoor climate.
Diffusers vaporise liquid and thus increase the humidity. They can also be filled with fragrances and essential oils, which they then distribute over several hours.
Sources
[1] ↑ https://de.wikipedia.org/wiki/Luftfeuchtigkeit
