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A medium humidifier removes 30 to 35 pints of moisture at 65°F, or 50 to 60 pints at 80°F (about 800 to 1,000-plus square feet). In 2019, the U.S. Department of Energy instituted new dehumidifier testing standards. Nowadays, dehumidifiers are assessed at lower temperatures to better simulate being placed in a real-life environment, such as the basement.
Keep it running all day long and the costs could mount up, but this is an excellent dehumidifier for situations where a refrigerant model just won’t work. We placed data loggers to record humidity and temperature around the room. Once we’d hit our peak humidity target, we switched on the test dehumidifier. It’s difficult to exactly match pint capacity exactly to your square footage. In the real world, dehumidifying needs can vary throughout the year. With a two-litre tank, it might need emptying more regularly than some models, but there’s a 1m hose if you need continuous draining into a sink or drain. And while there’s no timer, you do get a laundry mode and a choice of quiet and turbo functions, and the rotary control is – as advertised – simple and easy to use. Low temperature setting and/or auto-defrost: These features are helpful if the dehumidifier will be in a cool place, as they help ensure the unit can operate properly in cooler temps.Other types include desiccant dehumidifiers, which will use a water-absorbing material, and thermoelectric dehumidifiers, which operate with charged plates. Generally speaking, neither of these latter two types are as effective as condenser models, which is why we only recommend this type in our list. Peltier dehumidifiers also cool the air and condense the moisture content into water, but they do it using a cold heat-sink rather than a compressor. They’re not as effective as compressors, removing smaller amounts of water in a given time, but they’re quieter and more energy-efficient. Peltier dehumidifiers tend to be compact, lightweight units designed for smaller spaces. We narrowed the list down to several models based on features, price, efficiency and ease of use. How to choose the best dehumidifier Low Noise Design- minimise noise and maximise comfort by optimising the refrigeration and air duct systems. The noise is as low as 39dB. The DF Dehumidifier also uses reciprocating compressor technology allowing less vibration to effectively reducing the noise level. A large humidifier removes 40 to 55 pints of moisture at 65°F, or 70 to 90 pints at 80°F (about 1,200 to 1,500-plus square feet).
As a consequence, the biggest dehumidifiers, which originally offered 70-pint capacities, have now been reduced to capacities of 45-50 pints. This is because warm air can hold more water than cool air, so the dehumidifier will naturally absorb less in lower temperatures. This varies according to the design, size and extraction rate. Generally speaking, desiccant dehumidifiers use more energy per hour than a compressor model, but can also work more effectively at removing moisture, which means costs tend to even out. Although the build quality is slightly lower than other units, the up-side to this is that it’s relatively lightweight. It weighs in at 36 pounds versus 40-plus pounds for the other units we tested.Medium-sized models, on the other hand, have been reduced from 50 pints to 30 pints capacities. Whereas small dehumidifiers have moved from 30 pints to roughly 20 pints. Any dehumidifier with a score above 1.8 qualifies for an Energy Star rating. All the dehumidifiers we tested are Energy Star products.
Pumps: Attached to the hose, a pump can send water up to a sink or window. Many can move water up to 15 feet. Dehumidifiers generally come in three sizes: large (45-50-pint capacity), medium (30-pint capacity) and small (20-22-pint capacity). All dehumidifiers have filters to keep dust off the heat exchangers. The Frigidaire has the sturdiest of those tested. In other cases it felt like the filters or clips that held them in place would break sooner or later.
The best dehumidifiers you can buy in 2023
Key specs – Dehumidifier type: Compressor; Tank size: 2.5l; Extraction rate: 10 litres per day; Dimensions: 47.2 x 23.7 x 31.9cm (HWD); Warranty: 5 years parts and labour If you routinely move the units between rooms, particularly between floors, then you may want to go for several smaller units. A 20 pint unit would work well for most small rooms. How Do You Empty A Dehumidifier? This was the best front reservoir design we tested. Front opening reservoirs are often awkwardly shaped. This leads to spilling while emptying. A small humidifier removes 20 to 25 pints of moisture at 65°F, or 30 to 40 pints at 80°F (about 400 to 600-plus square feet).
What bumped the Frigidaire FFAP5033W1 above the other devices we considered is its design. It's sleek and has an attractive digital display, making it easy to see indicator lights and settings. The Frigidaire Gallery wasn’t the fastest at reducing humidity under our test conditions, but it had other strengths. Low Noise Design - minimise noise and maximise comfort by optimising the refrigeration and air duct systems. The noise is as low as 39dB. The Dehumidifier also uses reciprocating compressor technology allowing less vibration to effectively reducing the noise level. The key difference to an air conditioner is that the air is rewarmed before it gets returned to the room. So, moist air goes in, and drier air comes out at about the same temperature as it started. We used multiple humidifiers to create a disgustingly humid environment in a temperature-controlled room. These saturated the room air with water vapor, leaving the dehumidifiers facing a tough performance challenge.
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There are a huge range of dehumidifiers on the market. Before choosing your favorite, here are a few factors you should consider:
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