We have selected the best rated products for March 2021.
Best Value Dehumidifier: Our Score = 87%
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Choosing a Dehumidifier: Buying Guide (Updated March 2021)
Damp and humidity is a common problem in many homes, not to mention garages, caravans and cellars. Not only can persistent moisture in the air lead to damage to both the structure and everything inside, it can also result in allergies and health problems. As such, investing in a good dehumidifier can be a great decision.
Types of dehumidifiers:
Dehumidifiers are available in two basic formats: Refrigerant (or compressor), and desiccant.
A refrigerant dehumidifier works by condensing air on cold metal plates or coils, then collecting the resulting moisture in a tank. They work best in warmer conditions, and so are ideal for inside the home. They’re energy efficient and work quickly, but are also louder than desiccant models.
A desiccant dehumidifier works by using absorbent material to collect water from the air, then heating the material to extract the moisture. They work well in cold temperatures, plus are light and easy to move around, so would be well suited for use in garages, outhouses and vacant caravans or holiday homes. However, as they use heating to extract the water, they are less energy efficient than refrigerant models.
Dehumidifiers are measured by the amount of moisture they can extract from the air in a 24-hour period, and your needs will be dictated by the area you plan to use it in. A small model of around 5-10 litres will work absolutely fine in a small space such as a caravan or second bedroom, but for a frequently used living room you’ll probably want to look for something larger, at around 10-20 litres.
You can also find mini-dehumidifiers if you have just a cupboard or other small area that needs the damp removing.
The tank capacity will dictate how often you need to empty the dehumidifier’s reservoir. The reservoir should be easily accessible, and often have handles to make carrying it to the sink easier. Also check that it has an enclosed top, as you don’t want to be worrying about spillage as you carry it. Some models also have a continuous drain facility, which enables you to attach a hose and run it to a low-level drain (be aware that the dehumidifier will have to be higher than the drain for this to work).
Humidistats allow you to choose the desired humidity levels in the air, and the dehumidifier will cycle on and off to maintain this.
Timers allow you to pre-set when you want the dehumidifier to come on and switch off, allowing you to choose the most energy-saving profile.
Auto-defrost is used by refrigerant dehumidifiers when it gets cold enough that the extracted moisture starts to freeze on the coils. The dehumidifier defrosts automatically before restarting the dehumidifying cycle. (Desiccant models don’t need this feature due to their design).
Filtration – some models also provide extra air filtration, purifying the air as it’s dehumidified. This can be particularly useful for allergy sufferers.
Physical size can also be a factor – large models can weigh over 13kg, and be difficult to manoeuvre up and down stairs. Consider where you’ll be planning to use the unit, and for larger models look for inbuilt wheels.