Noise levels: Sadly noise levels are what lets this mini dehumidifier down. The brand measures them as 39dB, the loudest of all the low cost dehumidifiers in our round-up. And, for such a small unit, it does make a lot of noise. I found I couldn’t leave it on overnight because it irritated me, which is a shame as its light feature means it would otherwise have proved itself a good nightlight. Noise levels: This is where the Silentnight 39899 really comes into its own. When switched on, its operating noise levels are just 25dBA, and when I say it’s whisper quiet, I mean it. I couldn't hear this dehumidifier whilst it was running at all. That makes it perfect for anywhere you want to maintain peace and quiet, and thanks to its green light, I thought it made the perfect addition to a kids bedroom, doubling up as a nightlight when its running. When the dehumidifier is in operation, a green light tells you it's on, this light turns orange when the tank is full and the dehumidifier will automatically shut off when tank capacity is reached.

Then there's noise levels to consider, although as most of cheap dehumidifiers use Peltier condensers noise levels are already lower than more powerful compressor dehumidifiers. All dehumidifier's should give their operating volumes (measured in dB) in the specifications. Water tank capacity is also reduced compared to the ProBreeze's super generous 1.5L tank, with the Silentnight model only able to hold 0.6L of water – which means you'll be emptying the tank a lot more frequently. However, I tested the Challenge 0.5 Litre Mini Dehumidifier several times in my kitchen whilst cooking and found it collected excess moisture caused by steamy conditions efficiently. Energy use Using just 40W of energy to run, the ProBreeze 1500ml Mini dehumidifier is very cheap to operate. I kept a close eye on my smart meter whilst using it and it didn’t even register, at current energy prices costing less that 1p per hour to run.

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Still, the CONOPU dehumidifier performed well during testing. I used it mostly in the kitchen to try to eliminate build up of condensation when I was cooking, and it worked really well at removing some of the excess moisture. In the bedroom, it got rid of some of the morning condensation but I have quite a large room so it struggled to keep up, and unfortunately its noise levels meant I opted not to leave it running all night long. More on that below.

However, if you're able to extend your budget a little then it’s well worth looking at the Meaco Arete One Dehumidifier. This is more of an ivestment, but is our top-rated dehumidifier overall. Plus, it's quiet, easy to use, works superbly and is very energy-efficient compared to other compressor models. Its Smart Laundry Mode also makes it one of the best dehumidifiers for drying washing indoors. There are 10, 12, 20 and 25L models available, and, all offer a built-in air purifier that means they improve indoor air quality in more ways than one. You can get the full details in our MeacoDry Arete One Dehumidifier review. How we tested Price is another really important factor for analysing the quality of Challenge 0.5 Litre Mini Dehumidifier vs other products in the Dehumidifiers category. It’s obvious, but you will need to set your expectations of quality based on your budget and the price of the product you’re looking at, against the price of alternatives. The brand of product you buy can vary in importance, from person to person. Some people will of course be much more particular about the brands they will use. Whilst others aren’t interested in the brand and are more interested in the overall quality or price of the product itself. Thankfully Challenge is a brand that many customers have grown to love over the years and is very popular for items in the Dehumidifiers category. The next step after looking at products in the same category, was to look at products from the same brand, Challenge.Performance: Also capable of reducing moisture in a 15m² space, the Silentnight 39899 600ml Dehumidifier just does so at a slower rate than the ProBreeze 1500ml Mini dehumidifier, extracting 0.3L of water from the air per day in contrast to the ProBreeze's 0.5L. More information on quality can be found in this old but still very helpful article from Harvard Business Review.

Noise levels This dehumidifier uses a Peltier condenser that means there's no noisy compressor to disturb you, however, that doesn't make the ProBreeze 1500ml Mini dehumidifier totally silent, there's still the noise of the fan to adjust to. I left it running in my bedroom overnight, and although the 40dBA noise is noticable and initially bothered me, I soon zoned it out. Plus, there’s no varying fan speed which means its white noise is easier to ignore. Features: Digital Display, Full Tank Indicator, Automatic Shut Off, Removable Water Tank, Visible Water Level, Moisture Trap So let’s carry on with our Challenge 0.5 Litre Mini Dehumidifier review and explore the product’s pricing.

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Noise levels: The official specifications say that this dehumidifier is 37dBA but I barely heard it. I didn’t even realise it was on when I was in the room. It runs so quietly, you occasionally hear the odd drip as the water hits the already collected water in the tray but that’s about it. It’s ideal for use when you’re working or overnight as it won’t disturb the peace.