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Key specifications
- Power
- 330 W
- Dimensions
- 30.5 × 23.5 × 49.5 cm
- Net weight
- 12.5 kg
- Dehumidification
- 20 l/day
Verified specifications
- Power
- 330 W
- Dimensions
- 30.5 × 23.5 × 49.5 cm
- Net weight
- 12.5 kg
- Dehumidification
- 20 l/day
- Coverage
- up to 35 m²
- Condensate tank
- 4.3 l
- Noise level
- ≤ 43 dB(A)
- Timer
- 24 h
- Humidity range
- 30–80 %
- Modes
- auto / continuous / sleep
- Continuous drain
- yes
- Tank-full indicator
- yes
Product description
WetAir · WAD-B20L
Up to 20 L/day moisture removal with a 4.3 L tank
WetAir WAD-B20L is rated to remove up to 20 L/day, with suggested coverage up to 35 m². A 4.3 L tank and continuous drainage option give you a choice of how to collect the condensate.

- Moisture removal
- up to 20 L/day
- Rated performance; actual water collection depends on temperature and humidity.
- Tank capacity
- 4.3 L
- Suggested room size
- up to 35 m²
- Performance depends on room conditions.
- Timer
- 24 h
- Power input
- 330 W
How it works
Airborne moisture becomes collected water
The dehumidifier cools air inside the appliance so some water vapour condenses.
Room air enters
A fan draws room air through the unit; clear grilles allow it to circulate freely.
Moisture condenses
On the cold heat exchanger, some water vapour turns into droplets. The amount depends on incoming air temperature and humidity.
Water is collected
Condensate from the WAD-B20L collects in its 4.3 L tank or flows out through a connected continuous drain.
Drier air returns
Air passes the warm part of the system and returns to the room drier and slightly warmer.
The resultThe unit reduces excess humidity, but does not repair leaks or replace ventilation.
Room for collected moisture
The 4.3 L tank holds water until you empty it, with an indicator for a full tank. For extended operation, continuous drainage can be connected following the hose installation instructions.
Operation to suit the room
Automatic, continuous and sleep modes are available, with a timer of up to 24 hours. The 20 L/day rating is not a constant collection rate: cooler or drier air generally yields less water.
Getting started
Prepare water collection
Position level with the clearances specified in the manual. Fit the tank in place; if drainage is needed, connect the hose as instructed without kinks.
Choose the mode
Choose automatic mode for everyday moisture control; use the control panel to select the available settings.
Monitor the result
Check humidity and the full-tank indicator. Moisture from leaks or wet building materials also requires action at its source.
Your questions answered
Should the tank be removed for continuous drainage?
No. Keep the tank correctly fitted even when using the drain hose. Route the hose downhill to the drain without kinks, and check that water flows freely.
Why is daily water collection below the rating?
The rating is measured under specified test conditions. Cooler or drier room air contains less moisture; judge the reduction in humidity, not just litres in the tank.
Manual and service
Model documentation and WetAir support.
Customer reviews
What customers say about this model
Short positive excerpts about this exact model with direct links to public sources.
Where to find WetAir
These links open general WetAir retailer pages and do not confirm stock for this model.

