How to choose your dehumidifier?
Are you noticing persistent damp in your home? A musty smell, laundry that won't dry properly or condensation on your windows — these are all signs that your humidity level is probably too high.
To restore a healthy indoor environment, an air dehumidifier could be the ideal solution. But how do you choose the most suitable model? Bestherm guides you through the process step by step for cleaner, more comfortable air.
Why regulating humidity in your home is essential.
Excess humidity is not only unpleasant — it can also be harmful to your health and your home. According to ADEME (the French Agency for Ecological Transition), the ideal indoor humidity level is between 40% and 60%.
Excessively humid air encourages:
- The growth of mould and fungi
- Condensation on walls and windows
- Unpleasant odours
Over time, these conditions can cause respiratory problems, allergies and damage to your walls and furniture.
First steps to reduce humidity at home
Before investing in a dehumidifier, a few simple habits can help reduce the humidity level in your home:
- Ventilate regularly, especially after showering, doing laundry or cooking
- Cover your pots and use the extractor fan to limit steam
- Dry laundry outdoors or in a well-ventilated room
- Ensure your home is properly insulated and ventilated: a good MVHR system and high-performance windows make a significant difference
- As a complement, a dehumidifier effectively dries the air and improves your comfort
Choosing the right dehumidifier: key criteria
To choose the most suitable dehumidifier, several criteria should be considered:
- Dehumidification capacity: expressed in litres per day, this defines the efficiency of the appliance
- Room size: expressed in m³, this allows you to choose a model capable of effectively treating the air in your space
By taking these criteria into account, you optimise the efficiency of your appliance whilst guaranteeing clean, comfortable air.
| Product | Capacity (L/day) | Power | Volume treated (m³) |
|---|---|---|---|
| NOVA 5L | 5L | 155W | 80–120 m³ |
| KERIA 10L | 10L | 165W | 160–215 m³ |
| ILLA 12L | 12L | 185W | 160–215 m³ |
| ATHEA 20L | 20L | 270W | 220–290 m³ |
| FERYEL 24L | 24L | 305W | 220–290 m³ |
All our dehumidifiers also feature a dedicated slot for an active carbon filter and a HEPA 13 filter, to improve air quality in addition to regulating humidity.
Thanks to this filtration system, our appliances offer a dual benefit: limiting excess moisture whilst contributing to cleaner, healthier indoor air.
Where and how to install your dehumidifier?
To ensure maximum efficiency, follow these recommendations:
- Place the appliance in an enclosed room (keep windows and doors closed during operation)
- Leave a clearance of at least 20cm around and 50cm above the appliance for optimal air circulation
- Avoid outdoor installation or placement in overly ventilated areas
- Ensure the ambient humidity level does not exceed 80% for safe and efficient operation of the appliance
With Bestherm, you benefit from cleaner air and a more comfortable home. Whether you are looking for a discreet model for a bedroom or a powerful dehumidifier for larger rooms, our range adapts to every need.
🔎 Explore the complete Bestherm dehumidifier range now and find the ideal model for your home!



