A moisture absorber or dehumidifier works better in most rooms: it continuously removes moisture from the air and has a much greater capacity. A moisture absorber is inexpensive and silent, but quickly becomes full and is therefore best suited for small, enclosed spaces such as a wardrobe or a car.
What is the difference between a moisture absorber and a dehumidifier?
A moisture absorber is a container or bag with a moisture-absorbing substance. It absorbs moisture from the air and collects it in a reservoir. The device does not require electricity, but the substance becomes saturated over time and must then be replaced. A dehumidifier works actively: air is drawn through it, the moisture is removed and collected in a water tank. You empty the tank yourself, or you drain the water if the device allows it.
The main difference is therefore capacity and continuity. A moisture absorber works on a limited scale until it is full. A dehumidifier continues to work as long as there is electricity and the tank is not full.
When should you choose a moisture absorber?
A moisture absorber is useful for a small volume: a wardrobe, a storage chest, a caravan in winter storage or a drawer with papers. You do not need an electrical outlet and the device makes no noise. For an entire bedroom, bathroom or basement, the capacity is usually too small.
It is also important to note that moisture often has a cause: insufficient ventilation, drying clothes indoors or a leak. Milieu Centraal states that dehumidifiers and moisture absorbers do not solve the moisture problem and do not replace ventilation. Therefore, consider them a useful addition to ventilation, not a replacement.
When should you choose a dehumidifier?
A dehumidifier is suitable for a room that feels structurally damp, for windows that fog up or for clothes dried indoors. Milieu Centraal points out that dehumidifiers can consume a lot of electricity, so it pays to choose the right size and use it effectively. Also read about the situations in which you need a dehumidifier.
Comparison at a glance
| Feature | Moisture absorber | Dehumidifier |
|---|---|---|
| Operation | Passive, absorbs moisture in a substance | Active, removes moisture from the air into a water tank |
| Electricity | Not required | Yes, 80 W with the Dynter DH251 |
| Capacity | Limited, quickly becomes full | Up to 900 ml per day with the Dynter DH251 |
| Suitable for | Wardrobe, chest, caravan, small space | Bedroom, living room, bathroom, basement |
| Maintenance | Refilling or replacement | Emptying and cleaning the tank |
Direct answer: choose a moisture absorber for a wardrobe or other small, enclosed volume and a dehumidifier for an entire room with persistent moisture, and ventilate in both cases as well.
How much does a dehumidifier cost in electricity?
The power of the Dynter DH251 is 80 W, so 0.08 kWh per hour. Assuming 30 cents per kWh, this amounts to approximately 2.4 cents per hour, and about 24 cents after ten hours of use. The actual costs depend on your tariff and how long the device actually runs. You can find more calculation examples in our article about the daily electricity consumption of a dehumidifier.
Product spotlight: Dynter DH251 dehumidifier
The Dynter DH251 dehumidifier is intended for spaces up to 55 m² and weighs only 2.5 kg, so you can easily move it from room to room.
Dehumidification: up to 900 ml per day.
Water tank: 3800 ml, with a safety sensor that switches off the device when the tank is full.
Consumption: 80 W.
Extras: timer from 1 to 24 hours, night mode with the display off and ambient light.
Are you looking for a different size or application? View all Dynter dehumidifiers. If there is mould on the wall, however, a dehumidifier helps reduce moisture, but you must address the cause. Read whether a dehumidifier helps against mould and for persistent mould, visit the page on mould in the home from Milieu Centraal. If your symptoms persist, see your GP: a device is not a treatment.
Frequently asked questions
How long does a moisture absorber last?
This varies by product and room. As soon as the reservoir is full or the substance has dissolved, it will no longer work and you must replace or refill it.
Can I combine a moisture absorber and a dehumidifier?
Yes, for example, a dehumidifier in the room and a moisture absorber in the wardrobe. Also make sure you continue to ventilate.
Is a dehumidifier expensive to run?
The consumption depends on the power. At 80 W and assuming 30 cents per kWh, one hour of use costs approximately 2.4 cents.
Does a moisture absorber help against mould?
Only if the cause of the moisture is removed. According to Milieu Centraal, mould is a sign of moisture problems and insufficient fresh air.
Do I still need to ventilate with a dehumidifier?
Yes. Ventilation is still necessary for fresh air and to remove moisture; a dehumidifier does not replace that.