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Ideal Home reviewer Joanne Lewsley tested the Princess Smart 20L dehumidifier for more than a month in a period home, including a bedroom prone to condensation. She found the Wi-Fi app straightforward to use and compared the unit’s humidity readings with an independent monitor; the supplied report does not give numerical humidity changes or a quantified moisture-removal result.
Ideal Home reviewer Joanne Lewsley tested the Princess Smart 20L dehumidifier for more than a month in a period home, including a bedroom prone to condensation, and reported that its app-based controls were straightforward to use. The test offers a real-home look at a 20-litre-per-day compressor model, but the available report does not provide numerical results showing how much humidity fell or how quickly the room dried.
Lewsley used the dehumidifier in several rooms, comparing conditions in a damp bedroom with thick walls and limited seasonal ventilation against drier areas of the house. She also compared the humidity readings shown on the machine and in its app with readings from an independent monitor. The report describes the testing approach but does not publish the readings or the size of any difference between them.
The unit can be controlled through its top panel or the Princess app, which displays room humidity and allows users to adjust fan speed, set humidity targets, create schedules and switch the machine on or off remotely. Lewsley said connecting it to Wi-Fi and adding it in the app took a few minutes. The model also works with Google Assistant, according to the report.
Listed specifications include a 3.7-litre tank, a continuous-drain option with a hose, a recommended room size of up to 20 square metres and a stated noise range of 39 to 44 decibels. The unit is 57.2 centimetres tall and weighs 12 kilograms. The source gives a recommended retail price of £230 and says it was available at B&Q, but does not establish whether that price or availability remains current.
What the Bedroom Test Shows
The report matters to people weighing whether a smart dehumidifier suits a room where condensation is a recurring problem. It describes practical features that may affect daily use: remote operation, humidity monitoring, scheduling and the choice between emptying a tank and using a drain hose. The reviewer also tested the machine in more than one room rather than relying only on manufacturer specifications.
At the same time, the available findings do not establish that this model prevents mould, solves damp caused by building defects or delivers a particular reduction in humidity. Readers should treat the review as one household’s experience, not a controlled comparison or a guarantee of results in every home. The missing numerical measurements make it difficult to judge the size of the reported impact on the bedroom.
Princess Smart 20L Wi-Fi dehumidifier
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How the Month-Long Test Worked
The tester selected a period home with thick walls and limited ventilation, where condensation tends to build up during colder weather. The bedroom was described as particularly prone to damp and occasional mould, making it a relevant setting for assessing routine moisture control. The machine was also used in drier parts of the house to check how it operated under different conditions.
Alongside humidity comparisons, Lewsley assessed setup, app and manual controls, noise on both fan settings, and routine tasks such as emptying the tank and removing the filter. The report says the unit arrived with castor wheels attached, its filter in place and a hose for continuous drainage. The manual recommends leaving about 20 centimetres of clearance around it and keeping it out of direct sunlight.
“Connecting it is as simple as downloading the Princess app, connecting to Wi-Fi, creating an account and adding the device, all of which took just a few minutes.”
— Joanne Lewsley, Ideal Home reviewer
20L compressor dehumidifier with humidity sensor and app control
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Humidity Results Still Unreported
The supplied report does not include the independent monitor’s readings, the humidity levels before and after operation, or a measured time for the bedroom to reach a target. It also does not state how much water the machine collected during the month. Without those figures, the extent of any change in moisture levels is not possible to quantify from this material.
The report excerpt also ends during its description of the unit’s appearance. It does not include a full account of the reviewer’s conclusions about long-term performance, maintenance, energy use or whether the machine reduced condensation or mould. Those outcomes should not be inferred from the testing method or from the product’s stated capacity.
digital hygrometer indoor humidity monitor
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Check the Full Review Findings
The next useful information would be the full review’s reported humidity readings, water collection and final assessment of performance over the testing period. Readers considering a purchase should also check current retailer pricing and the manufacturer’s guidance for room size, drainage and placement, since the cited £230 price is a listed RRP rather than confirmation of today’s price.
For now, the published material supports a limited conclusion: the reviewer used the smart controls and tested the unit in a damp bedroom over an extended period, but the results provided here do not quantify how much the room’s humidity changed. Further findings are needed to judge its moisture-control performance.
dehumidifier continuous drain hose
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Key Questions
Which dehumidifier did Ideal Home test?
The review tested the Princess Smart 20L, a compressor dehumidifier with Wi-Fi controls and a stated extraction capacity of up to 20 litres per day.
Where was the dehumidifier tested?
Reviewer Joanne Lewsley used it for more than a month in a period home, including a bedroom prone to condensation and drier rooms elsewhere in the house.
What can the Princess app control?
According to the report, users can check displayed humidity, change fan speeds and humidity settings, set schedules and timers, and switch the unit on or off remotely.
Did the report show how much humidity fell?
Not in the supplied material. It says the reviewer compared the unit’s readings with an independent monitor, but gives no numerical readings or measured reduction.
What is the listed price and tank capacity?
The source lists a £230 recommended retail price and a 3.7-litre tank. The price is not confirmed as current, and the machine also has a continuous-drain option.
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