Our trials showed that moisture absorbers won’t do much to reduce damp in a room that’s routinely used for drying laundry. So moisture absorbers can help with small day-to-day damp issues, but shouldn’t be relied upon for any serious damp-busting. Smart features So-called 'smart' dehumidifiers can be controlled via a smartphone app as well as the standard control panel. This could come in handy if you want to turn your dehumidifier on or off or adjust the settings, such as fan speed, while you're in another room or even out of the house. Keep in mind that smart models tend to be more expensive. Discover which retailers are rated highly by Which? members with our expert guide on the best and worst shops . How to dry clothes indoors during winter

Find out more about improving your indoor air quality at home. Moisture absorbers: can they help with damp? We like that they’re reasonably priced, and once they’re in use, they should last for up to two months, depending on the amount of moisture there is in your motorhome.

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Another feature we like is that the fans will run for five extra minutes to make sure the target humility is met, before turning off for 30 minutes. It will then test the air again, and if all is well, it will turn off for another 30 minutes. Suitable for use in living spaces of up to 15 m sq ideal for caravans, living rooms, kitchens, bedrooms. Product comes with an extra 500 gram refill of Kontrol Krystals.

Dehumidifier manufacturers have started to update their older models or create new ones using refrigerant gases with less of a global warming impact, such as R290. If you buy an older second-hand model, it may use a HFC (hydrofluorocarbon) refrigerant that can be a potent greenhouse gas if leaked. As well as automatically turning off when the tank is full, the dehumidifier also provides cleaner air, thanks to an anti-bacterial filter and ioniser.

The non-electric option is budget-friendly, although you will need to buy tabs for it from time to time – each refill should last for up to three months. You’ll be able to keep an eye on when the tab needs changing, thanks to an indicator. We see this moisture when condensations forms on our windows, an unsightly patch of damp forms or wallpaper or paint work begins to peel or flake. Excess atmospheric humidity can also cause damage to structural wood, furniture, car body work, boat hulls as well as causing unwanted odours and/or musty stale air both of which are detrimental to health and well-being. If you’re running a dehumidifier, keep the door to the room the dehumidifier is in open, so that air can circulate through your home. But close the window, so that damp air outside – which will migrate towards drier spots – isn’t drawn to the drier air indoors. Suitable for use in living spaces of up to 15 m sq ideal for caravans, living rooms, kitchens, bedrooms.