These are great. You can get them in Asda, Wilko's and other places too. Very satisfying to see the water collect!"(Recommended by Mumsnet user BigbreastsBiggerbeard) Our verdict So, if you’re after the smallest dehumidifier on the market, we think the Russell Hobbs RHDH1061G wins the accolade of best small dehumidifier, with good all round performance for its size housed in one of the smallest builds on the market – along as you don't expect too much from that 0.3L extraction rate. That depends on your humidity levels and what you’re trying to achieve. You don’t always have to leave your dehumidifier on, but you may want to if your damp problem is severe. Also, it can be cheaper to run them at night. They are brilliant, we have one running every night, makes a huge difference, we brought ours based on the number of bedrooms in our house. Saves wiping down windows in the mornings. Drying of washing when you can’t hang it outside at this time of year, Well worth the money, ours is full every morning."(Vetted by Mumsnet user Roselilly36) Our verdict

Domestic dehumidifiers can extract up to 25 litres of water per day. We have largely focused on 20l models since these are the most popular for domestic use. For larger spaces, damper environments or colder temperatures, choose something more powerful. (Or vice versa for smaller spaces.)

Why you should trust us

Humidity Selector - You can select your desired humidity between 35% and 80%. When it reaches this target, it will automatically switch off. When the humidity rises naturally, it will automatically switch on again.

Finally, air ionizing is a really good "Nice to have" feature. This will really benefit asthma, hay fever and allergy sufferers the most. On the noise front, it's about the same as a fan oven. I've read people have slept quite easily with it whirring away in the bathroom next door.

Should you leave a dehumidifier on all the time?

Humidity levels: Relative humidity (RH) should sit between 30 to 60%, and most models have a built-in humidistat to keep the room at your chosen level. Devices with an auto-setting monitor adjust the moisture levels in the room, which can save on electricity.

As Chris Michael, Managing Director of the air quality brand Meaco says, inside the home, 'excess moisture in the air can come from drying clothes in the house, boiling vegetables, putting the kettle on, bathing, showering, open flame gas style heating, damp clothing, breathing, and the damp British weather.' From older, draughty houses to unheated, low-traffic spaces like a garage or basement, experts recommend a desiccant dehumidifier, like the EcoAir DD1 Simple, as the most effective type in colder temperatures (far more than its compressor counterparts). What’s more, Mumsnetters love this model for its compact, slimline design with a portable carry handle and its ability to quietly extract up to seven litres of water daily (so you won’t be disturbed whilst sleeping or working from home!). While we know that Pro Breeze is a good quality brand of dehumidifiers and is very popular with users, you can see from our comparison chart that the Newentor is a much more energy-efficient choice for those that want high-performance while saving on their energy bills. Final thoughts The unit isn't the lightest or most compact we've tested, but then we wouldn't expect that from a machine this powerful. However, built-in wheels, a retractable carry handle, and cable tidy make it easier to move around the house and store neatly away when it's not in use. If you’re looking for a small dehumidifier, then the Russell Hobbs RHDH1061G Portable Dehumidifier is about as compact as it gets, measuring just H22 x W14 x D14cm and weighing in at 0.9kg.

A compressor dehumidifier is the most common type in the UK as it works best in higher temperatures, such as in a heated home. The Pro Breeze 12L Low Energy Dehumidifier is a popular choice thanks to its relatively low price point that makes it one of the best value compressor dehumidifiers you can buy.

As explained above, make sure you’re using your dehumidifier at times of day when it will be the cheapest and most effective. Does a dehumidifier use a lot of electricity? This dehumidifier is designed for managing fairly low moisture levels in small rooms up to 15m² or 2200 cubic feet, so it isn't going to cope with major damp issues or be able to control humidity within an entire house like larger capacity dehumidifiers. That said, the ProBreeze 1500ml Mini dehumidifier still impressed us during testing, and as long as you don't expect too much of it, this mini dehumidifier has a lot of plus points, not least its affordability. The advantage of this type of dehumidifier is that it works well in warm and cold spaces. The only downside is that they tend to release warm air into a room, which you may not want in an already-heated home. However, they are ideal for a cold garage, loft or conservatory as they can operate below 10 degrees, unlike a compressor dehumidifier. They are also much quieter, so they might be a preferable option for you to use in a bedroom. Their main disadvantage is that they use a lot more energy and therefore cost more to run. Refrigerant (compressor) dehumidifier Type: Compressor Dehumidifier | Extraction amount: 300ml | Tank capacity: 600ml | Dimensions: H22 x W14 x D14cm | Weight: 0.9kg | Power: N/A | Cost per hour: N/A | Noise level: 35dB | Max room size: 15m²| Laundry mode: No | Warranty: 2 year What we likeThis will help improve your indoor air quality and is great if you have pets or family members that suffer with asthma or allergies. Yes, I have two. One upstairs and one downstairs. Its the challenger brand from argos. They make a huge difference." (Brand tried and trusted by Mumsnetter Pixiedust1234) Our verdict Just like the larger models, there a hose for continuous drainage. But it also has an ionizer which many other don't have. Portability: If you plan to move the dehumidifier around or use it in different rooms, consider its size, weight, and the presence of caster wheels or handles for easy mobility. Compact and portable models are ideal for versatility. That will be especially useful over the winter months as it means you won’t have to keep your heating on as long to dry your clothes, reducing your energy bills in the process,” says Wood.