Updated 2 November 2026
Desiccant dehumidifiers for cold rooms
In an unheated bedroom, garage, conservatory or holiday home, a compressor dehumidifier struggles below about 15 °C. A desiccant model keeps pulling water out of cold air.
EcoAir DD2 Simple (desiccant)
- 9 L/day
- 1 °C
- 3 L
A light desiccant dehumidifier that keeps working in cold, unheated rooms down to 1 °C, where compressor models struggle.
EcoAir DD3 Slimline (desiccant)
- 10 L/day
- 39 dB
- 3 L
Slim desiccant dehumidifier with humidity control and laundry mode.
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Desiccant or compressor?
| Desiccant | Compressor | |
|---|---|---|
| Works in cold rooms | Yes, down to around 1 °C | Loses a lot of performance below 15 °C |
| Running cost | Higher (450–650 W) | Lower (170–400 W) |
| Weight and noise | Lighter, often quieter | Heavier |
| Side effect | Warms the room slightly | Warms the room slightly |
If your rooms are heated, a compressor dehumidifier is usually cheaper to run.
Comparison
| Model | Key figure | Best for | |
|---|---|---|---|
| EcoAir DD2 Simple (desiccant) | 9 L/day | Best for cold rooms | Price |
| EcoAir DD3 Slimline (desiccant) | 10 L/day | — | Price |
Our picks in detail
1. EcoAir DD2 Simple (desiccant)
- Extraction: 9 L/day
- Works down to: 1 °C
- Tank: 3 L
- Weight: 6.7 kg
- Extras: economy and laundry modes, antibacterial filter
A light desiccant dehumidifier that keeps working in cold, unheated rooms down to 1 °C, where compressor models struggle. Ideal for garages, conservatories and cold bedrooms.
Pros
- Works in the cold
- Light (6.7 kg)
- Laundry mode
Cons
- Uses more power than a compressor model
2. EcoAir DD3 Slimline (desiccant)
- Extraction: 10 L/day
- Noise: 39 dB
- Tank: 3 L
- Extras: humidity sensor, timer, laundry mode, louvre
Slim desiccant dehumidifier with humidity control and laundry mode. Quiet for a desiccant and good in cold homes.
Pros
- Humidity control
- Quiet for a desiccant
- Laundry mode
Cons
- Price
FAQs
When should I buy a desiccant dehumidifier?
When the room is regularly below about 15 °C: unheated bedrooms, garages, conservatories, caravans and boats.
Are desiccant dehumidifiers expensive to run?
They use more power than compressor models, typically 450–650 W, so about 11.8p–17.1p an hour at 26.32p/kWh. In a cold room they still remove more water per penny.