Dehumidifiers are often placed in living areas and may well run for long periods, including overnight. In these cases, a noisy machine can be an irritation and disturb your sleep, so your choice of dehumidifier may be influenced by the noise it makes.
What affects the noise a dehumidifier makes?
All dehumidifiers have an intake fan to draw moist air in and an exhaust fan to expel dried air, and some models have a compressor that extracts the moisture. Each of these components makes a noise and the positioning of them can affect the overall noise level, as can the fan speeds.
Clearly, setting a lower fan speed will reduce the noise level but that also limits what the dehumidifier can do. When manufacturers quote a noise level this refers to the noise level at the lowest speed setting, so in practice the dehumidifier will often be louder.
Quietest Dehumidifiers in the UK
Newer dehumidifiers tend to be more energy efficient and, as a consequence, less noisy. On this page we will compare the quietest models we could find for sale in the UK. All these are desiccant dehumidifiers or use peltier technology so they don’t have a compressor which reduces the noise levels.
Note that sound intensity is measured in decibels (dB) and the logarithmic scale goes up in powers of ten so that each increase of ten is equivalent to a ten-fold increase in sound intensity (broadly representing a doubling in perceived loudness). To get a feel for the decibel scale, a whisper measures 15 dB while normal conversation is 60 dB.
1. REIDEA 700ml Dehumidifier
Noise Level: Below 25 dB
This is the quietest of the models reviewed at 25 dB and is towards the bottom of the price range. Despite this, it’s capable of removing up to 300 millilitres of water a day at a setting of 30⁰ C, so you’ll be emptying its 700 millilitres capacity tank every two days.
The product is small and compact, with a height of 27 centimetres and its 1.3 kg weight means it’s easy to move from room to room. The relatively low price is reflected by the absence of some features that higher priced products possess, although it does use peltier technology for quiet operation, has automatic off for when the tank is full and a multi-layer mesh filter to clean the air of dust and other substances.
This REIDEA dehumidifier has an attractive design with minimal controls and a full face of dense grills to maximise air throughput. It’s suitable for those wanting a quiet and no-nonsense dehumidifier that’s suitable for small areas but, if you want additional features, you may need to look elsewhere.
2. EcoAir DD122 Mini Compact Desiccant Dehumidifier
Noise Level: 32 dB
This is advertised as a compact dehumidifier although it’s taller than the REIDEA at 44 centimetres and is much heavier at 6 kilos. Although it’s somewhat noisier than the model reviewed above at 32 dB, it’s more powerful and can extract up to six litres of moisture a day at the highest setting. This will mean you have to empty the 1.8 litre capacity tank frequently though, and this extraction rate is unlikely to be maintained except in very damp buildings.
The EcoAir is a mid-priced model that has additional features to justify the price. In addition to fan and temperature settings and an automatic shut-off mechanism that kicks in when the tank is full, other features include:
- A temperature and humidity level sensor that automatically switches between full power, economy power and standby modes so that energy consumption is minimised and the air doesn’t become too dry
- A laundry mode to dry your clothes
- Three-position swing louvre that channels air flow over a wide or targeted area
- Anti-allergenic deodorising filter to mask odours and improve air quality
- Tilt-over protection to prevent spillage
On the automatic setting, the humidity level is set at 50% and can’t be adjusted and there is no indication of what humidity is achieved.
The high throughput of this machine means it’s suitable for those wanting to remove high levels of moisture and to dry laundry, although energy use can be relatively high for the latter. This is an effective machine but may not be the best for those needing a precise control of their environment.
3. Hysure 700ml Dehumidifier
Noise Level: Below 33 dB
At 27 centimetres high this is another compact model that is, along with the EECOO, the cheapest reviewed here (at the time of writing). It has a similar appearance to the REIDEA, with a full face of dense grills to achieve maximum air intake.
The low price is reflected by a lack of controls — a simple on/off switch controls the operation. Nevertheless, it used peltier technology to achieve a relatively quiet 32 dB when running.
The manufacturer states that this machine will take in up to 300 millilitres of water a day from an area of 15-20 square metres. This will mean the 700 millilitre tank will need emptying every two days. The indicator goes from green to orange when the tank is almost full.
If you want a small, compact and cheap dehumidifier that looks good in your house, this may well be the one for you. However, if you need something with greater capacity, throughput and control, you may have to spend a little more.
4. De’Longhi Compressor Free Compact Dehumidifier
Noise Level: 34 dB
This is the largest of the dehumidifiers reviewed at 47 centimetres tall and is also the most expensive. However, the price is reasonable considering that you get a relatively quiet machine with a good range of features.
The De’Longhi Compressor Free Compact Dehumidifier is a desiccant dehumidifier with a 2-litre tank plus an ioniser and microbial filter for dust, bacteria and mould spores. The control panel gives you access to the functions, including a laundry drying programme with turbo or economy settings as well as three settings for the dehumidifier function that include automatic to maintain a 55% relative humidity. There’s a timer to save energy and a swing function to change the angle of air output.
De’Longhi has been the dehumidifier manufacturer of choice for some years and this is its first desiccant version. It’s a relatively powerful machine that can extract up to six litres of moisture a day, though it isn’t the quietest on this list. If you need all the features, it may be worth paying the price but if not, cheaper models are available.
5. EECOO 700ml Dehumidifier
Noise Level: 35 dB
This EECO dehumidifier is one of the cheapest models reviewed here, though it’s the least quiet on this list. It’s also one of the most compact at only 27 centimetres high.
In view of the size and price, the EECO is a relatively basic device that is capable of removing up to 300 millilitres of water a day from an area of up to 215 square feet (20 square metres). As such, its 700 millilitre tank is adequate, although there’s a bigger model available with a 2-litre capacity and a price that is more than double.
Controls are limited to an on/off button, although the LED goes from green to yellow when the tank is full and the machine shuts off. Peltier technology contributes to the relative quiet operation and the low energy output of 23 watts.
If you want a cheap and simple to operate machine that reduces moisture levels in a small area, this model is ideal. But look elsewhere if you need more power and features, such as the ability to dry your laundry.