Venta review: a humidifier that fixes the worst part of humidifiers

Photograph: Courtesy PhotoView image in fullscreen Photograph: Courtesy PhotoVenta review: a humidifier that fixes the worst part of humidifiersVenta’s evaporative mechanism add cool moisture without mist, mineral dust or disposable filters

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If you live with forced-air heating, you know that winter can bring chapped lips, dry eyes and waking up with a scratchy throat. A common ultrasonic humidifier attacks the issue with an eye-catching stream of cool mist – and they work well. But as I found out after setting up two of them, they also bring an unwelcome guest: dust.

Minerals dissolved in the water travel with those droplets, leaving a messy residue behind. With two running, it was like an invisible dust storm rolled through every day, raining fine white powder everywhere. It coated furniture, clogged air filters and even choked computer fans. I don’t mind dealing with household dust, but a maddening amount accumulated daily.

Distilled water can fix this issue, but it would also saddle me with the plastic waste, hassle and expense of hauling gallons of water home from the store every week. Instead, I started looking for a different approach and found Venta humidifiers, which use natural evaporation to efficiently humidify air while leaving the minerals behind.

View image in fullscreen Photograph: Alan Truly/The GuardianVenta LW15 $280 at Abt Electronics Venta LW25 Humidifier $300 at AmazonA different way to humidifyThe Venta looks a bit like a shorter, fatter desktop computer. Instead of breaking water into droplets, these German-built humidifiers use evaporation – turbocharged. Inside, a stack of plastic platters rotate slowly like a ferris wheel, dipping into a reservoir at the bottom then exposing the freshly wetted section to a fan that pushes dry room air across it. The water evaporates into the passing air, while minerals remain in the tank.

There was no dramatic plume when I first turned mine on, which made it hard to tell whether anything was happening. But as the water level dropped, my humidity gauge rose. The white dust stopped accumulating and I stopped having to wipe down tables every single day

Like an ultrasonic model, the Venta is quiet and adds cool moisture, making it useful beyond winter. Air conditioning also removes moisture, so I sometimes need a humidifier during hot weather when our heat pump runs frequently.

View image in fullscreen Photograph: Alan Truly/The GuardianSome humidifiers heat water to produce steam. That works, but boiling water uses more energy, and adding heat in the summer is counterproductive. Venta adds moisture efficiently without noticeably changing the room temperature, or my electricity bill. Using just 4W for the smallest model, they’re even more efficient than ultrasonic humidifiers, which typically use at least 15 watts.

Cheap humidifiers keep producing mist until they run dry or someone turns them off. Nicer models use an electronic humidity sensor to regulate output, which is useful but not foolproof. The reading reflects conditions where the sensor happens to sit, often beside or inside the humidifier, while a large room can have noticeably different humidity levels from one area to another.

The Venta regulates itself naturally. Dry air readily absorbs moisture from the wet platters. As relative humidity rises, evaporation slows.

My SwitchBot Hub 2, which also controls our heat pump, displays temperature and humidity, but I like having a humidifier whose output naturally tapers as the air becomes more humid rather than relying entirely on a sensor or my memory.

That matters because excessive moisture can be as troublesome as dry air. Preventing mold means controlling excess moisture, rather than simply cleaning it after it appears.

View image in fullscreen Photograph: Alan Truly/The GuardianFewer refills and fewer partsMy other frustration with ultrasonic humidifiers was how often I had to fill them. They pump out a steady mist regardless of what the air can absorb, inevitably wasting some water. In contrast, every drop from an evaporative humidifier makes it into the air, so even the 1.4-gallon reservoir on the smallest Venta model, the LW15, lasts well over a day. The LW15 is rated for spaces up to 300 sq ft, but the same no-frills design is available as the Venta LW25 for rooms up to 430 sq ft and the Venta LW45 for spaces up to 600 sq ft.

One low-speed motor gently turns the evaporation cylinder while a fan moves air through the machine. There’s no wick filter to change, no demineralizing cartridge to replace and it will not clog your home’s air purifier filters (which can become a significant part of their lifetime cost).

View image in fullscreen Photograph: Alan Truly/The GuardianCleaning still mattersFilter-free doesn’t mean maintenance-free. Any appliance that holds standing water needs regular attention to prevent bacteria growth.

I give the inside a quick brushing as needed and deliver a deeper cleaning with vinegar every four to six weeks. Fortunately, the reservoir is wide open once the top is removed, so I can reach the bottom and corners easily with a brush.

The evaporation cylinder takes a little more effort. The closely stacked platters give mineral deposits places to collect, so they need an occasional vinegar soak to dissolve buildup before rinsing. Venta sells a $25 water treatment additive that is intended to reduce mineral buildup, but regular manual cleaning works for me. Either way, periodic inspection and cleaning are still essential, but less frequent than the alternatives.

View image in fullscreen Photograph: Alan Truly/The GuardianA cleaner solution to dry airFor all these perks, you pay a premium. Even the smallest Venta costs several times as much as an ultrasonic humidifier, but I consider it an investment in comfort that I’ll use for many years. My LW15 runs quietly, needs fewer refills and works just as well with summer air conditioning as it does with winter heating.

Ultrasonic humidifiers still make sense for occasional use in a small room, particularly with low-mineral or distilled water. But for regular use, I prefer Venta’s absurdly simple approach that sustainably puts only what I actually want into the air: water.

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