Prices in euros from Amazon.de, as of 11 June 2026. Prices and availability may differ on Amazon.co.uk.
Misted-up windows, damp corners, musty smell: we compared six dehumidifiers that fit into small flats, cellars and bathrooms, from the compressor workhorses with 12 to 20 litres per day against real mould to the whisper-quiet Peltier minis for the bedroom. Sorted by dehumidifying capacity, room size, tank volume, noise and technology. All listed on Amazon.de, prices from €50.
Reasoning and all data in the table below
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Editorial rating based on manufacturer specs and Amazon catalogue data. We do not trial products ourselves. How we rate
| Model | Position | Dehumidification | Room size | Tank | Noise level | Technology | Price | Rating | Recommendation |
|---|---|---|---|---|---|---|---|---|---|
 01 · Pro Breeze 12L dehumidifier★ against mould |
Our pick | 12 L/day | up to 20 m² | 1.8 L | 38 dB | Compressor | from €115 | 8,6 |
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 02 · Comfee MDDF-16DEN7-WFApp + Alexa |
Smart pick | 16 L/day | up to 32 m² | 3 L | about 45 dB | Compressor + app | from €156 | 8,3 |
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 03 · TROTEC TTK 54 Eup to 40 m² |
Cellar pick | 18 L/day | up to 40 m² | 3 L | 48 dB | Compressor | from €147 | 8,0 |
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 04 · Klarstein DryFy 20L20 L · 5 L tank |
Power | 20 L/day | up to 22 m² | 5 L | 46 dB | Compressor | from €201 | 8,1 |
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 05 · Pro Breeze 1,500 ml mini dehumidifierQuiet for the bedroom |
Quiet mini | 500 ml/day | small rooms | 1.5 L | quiet | Peltier | from €55 | 7,4 |
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 06 · Jialexin 1,500 ml mini dehumidifierunder €50 · sleep mode |
Budget pick | 350 ml/day | small rooms | 1.5 L | <40 dB | Peltier | from €50 | 7,0 |
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Which dehumidifier suits which room, damp problem and noise requirement.
The best all-rounder in the comparison: 12 L/day for rooms up to 20 m², a humidistat automatically keeps the desired humidity below the mould threshold, and the 38 dB sleep mode (Quiet-Mark) is quiet enough for the bedroom. A continuous drain hose is included. At around €115, the most affordable complete solution against damp walls.
The smart one among the compressor units: 16 L/day for up to 32 m², controllable via Wi-Fi app and Alexa. A dedicated laundry drying mode draws the moisture out of hanging washing in winter, and the 3 L tank has to be emptied less often than on the Pro Breeze. Three years of warranty. Ideal if you want to control the unit remotely.
The robust workhorse for cellar, laundry room and large rooms: 18 L/day for up to 40 m², the largest area in the comparison. Precise humidistat (35 to 85%), continuous drain hose and a spare parts supply guaranteed for 10 years. No app and, at 48 dB, not for the bedroom, but durable and strong.
The powerhouse: 20 L/day, the highest output, and at 5 litres the largest tank in the comparison, so it needs emptying less often. Fully equipped with humidistat, timer, auto-restart after a power cut and laundry mode. At 46 dB and 15 kg, a compressor working unit, not a quiet mini.
If even a 38 dB compressor is too much: this Peltier mini works whisper-quietly without a compressor and is practically inaudible at night. Up to 500 ml/day for small rooms such as bathroom, bedroom or wardrobe. Not a mould killer for large rooms, but the quiet specialist for small zones.
The cheapest quiet entry: a Peltier mini for under €50 with a real sleep mode (display + LED off) and timer, comfort that some more expensive minis lack. Up to 350 ml/day for small, warm rooms.
That depends mainly on the room size: for a bedroom or a small flat up to about 20 m², 10 to 12 L/day is enough, for example the Pro Breeze 12L. For larger rooms up to 32 m² the Comfee 16L is right, for cellars or large areas up to 40 m² the TROTEC with 18 L. The quiet Peltier minis (350 to 500 ml/day) are only meant for individual small zones such as the bathroom or a wardrobe.
These are two different classes of appliance. Compressor dehumidifiers (Pro Breeze 12L, Comfee, TROTEC, Klarstein) draw 12 to 20 litres per day and are the real answer to mould in flat and cellar, but audible and heavier. Peltier minis (Pro Breeze Mini, Jialexin) are whisper-quiet and cheap, but manage only 350 to 500 ml/day and lose a lot of effectiveness in the cold. Rule of thumb: against mould and in large or cold rooms, a compressor; for the quiet bedroom or small bathroom, a Peltier mini.
Yes, because it tackles the cause: mould only germinates from a relative humidity of about 60%. A dehumidifier with a humidistat keeps the humidity permanently at 50 to 55% and so takes away the mould's basis for life. What matters is the right capacity for the room; a mini that is too weak in a large, damp cellar achieves little. For acute damp problems, a compressor unit with 12 to 20 L/day is the right choice.
The quietest are the Peltier minis such as the Pro Breeze Mini: they work without a compressor and are barely audible at night. Among the powerful compressor units, the Pro Breeze 12L with its 38 dB sleep mode is the best choice. Units with 46 to 48 dB (Klarstein, TROTEC), on the other hand, are too loud for continuous night-time operation in the bedroom.
Compressor units draw 220 to 440 watts, but thanks to the humidistat run only when humidity is too high; realistically that is roughly €0.15 to €0.40 per operating hour, depending on model and mode. The Peltier minis are much more economical at 40 to 72 watts, but also draw much less water. Via the humidistat and a timer (for example on the Comfee or Jialexin), consumption can be limited in a targeted way.
Quiet HEPA units from 19 dB for allergy sufferers and against pollen: Levoit, Philips, Winix, Xiaomi.
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Torn between two specific models? Here is the direct comparison: