De'Longhi Tasciugo AriaDry DEX212SF Review

De'Longhi is best known in the UK for heaters and air conditioners, and the Tasciugo AriaDry range applies the same engineering focus on quiet operation and air quality to dehumidifiers. The DEX212SF sits in the middle of the range as a 12L/day model, positioned for a typical UK bedroom, home office or living room rather than a whole house.

What sets it apart from a straightforward compressor unit is the 3-action filtration system: a dust filter to catch larger particles, a removable allergen filter, and an active carbon filter to reduce musty damp smell and odours. For a household dealing with dust mites, asthma or general allergies alongside condensation, that's a meaningful extra over a dehumidifier that only extracts moisture. The trade-off for the slim, upright design (just 22cm deep) is a smaller water tank than some bulkier 20L rivals, at 2.1 litres.

De'Longhi pitches the DEX212SF specifically at buyers who want one machine to do double duty — tackling condensation on windows and damp walls while also cutting down on the dust mites and airborne mould spores that tend to accompany a humid room. That's a slightly different emphasis to a pure extraction-focused rival like the Russell Hobbs, and it's reflected in the price: you're paying partly for filtration, not just litres per day.

The DEX212SF's upright, narrow-footprint design is also worth noting if floor space is tight — at 22cm deep it slots into a gap beside furniture that a bulkier 20L compressor unit simply wouldn't fit into, which is part of why it's a popular choice for smaller UK bedrooms and box rooms rather than larger open-plan spaces.

For a bedroom, the DEX212SF's 36dB noise level and slim profile make it a reasonable choice to leave running overnight next to a wardrobe or chest of drawers, somewhere it isn't blocking airflow. Its filtration is a genuine benefit here if dust mites or allergies are part of the reason you're buying — running it during the day as well as overnight helps more air pass through the filter stack.

For drying laundry indoors, switch to the dedicated laundry mode, close the door, and position the unit near the clothes airer rather than across the room — like other compressor units, it works fastest in an enclosed space where the extracted moisture doesn't just get replaced by air from elsewhere in the house.

Because the 2.1L tank is relatively small for a 12L/day extraction rate, connecting the continuous drainage hose is worth doing from day one if you plan to run it unattended for more than a few hours — check De'Longhi's manual for the exact hose fitting, and route it to a nearby drain, sink or gutter outlet rather than leaving it to fill and shut off partway through a cycle.

If allergies are the main driver behind the purchase, it's worth replacing the active carbon and allergen filters on the schedule De'Longhi recommends in the manual rather than leaving the originals in indefinitely — a clogged filter reduces both airflow and the filtration benefit that's the main reason to choose this model over a cheaper unit with the same extraction rate.

De'Longhi also recommends leaving a gap of at least 20-30cm behind the unit for the air intake to draw freely — pushing it flush against a wall or wardrobe restricts airflow and can reduce both the extraction rate and the effectiveness of the 3-stage filtration, since less air is being pulled through the filters per hour.