Ultrasonic humidifiers offer a few advantages over evaporative humidifiers. All the drawbacks of ultrasonic humidifiers result from the fact that the humidifier releases water droplets into the air, not water vapor. This causes several problems. First, while most of the water droplets will eventually evaporate into water vapor, some of them will settle out of the air and onto nearby surfaces before they have a chance to evaporate.
This will be more of a problem if the air in the room is cold or if the air already has a high moisture content. The result is a damp area or even a puddle of water near the humidifier. This is why ultrasonic humidifiers need to be placed on a shelf or dresser instead of on the floor, so the water droplets have more time to evaporate before settling to the floor. A much bigger problem is the fact that any substances in the water will be propelled into the air along with the water droplets.
These substances will be either minerals or biological contaminants. Minerals are present in all tap water, and if you know you have hard water in your area, your water has more minerals than most. These trace amounts of minerals are carried into the air along with the water droplets when an ultrasonic humidifier is in operation in an evaporative humidifier, the minerals are left behind.
At the very least, these minerals will settle out of the air and leave a fine white dust on surfaces near the humidifier. At worst, anyone in the room can inhale these minerals. Because of the concern that people can inhale the aerosolized particles in the white dust, studies have examined the effects on the lung tissue of mice using tap water in ultrasonic humidifiers Umezawa et al.
Though the aerosol particles did not cause severe inflammation of the lungs in mice, the study authors concluded that demineralized water should be used instead of tap water to reduce any risk.
The EPA also recommends using distilled water instead of tap water in ultrasonic humidifiers. Distillation is the most effective method for removing minerals from water.
If the water in an ultrasonic humidifier, or the humidifier itself, is contaminated with bacteria or mold, it will emit those substances, exposing anyone in the room to them. All humidifiers have the potential to become breeding grounds for bacteria or mold. However, the EPA has found that ultrasonic humidifiers tend to disperse more biological agents than evaporative humidifiers.
There is one potential problem with ultrasonic humidifiers not related to water. While the vibrations they generate may be too high frequency for you to hear, they might be within the hearing range of your dog. There have not been any studies on the effects of ultrasonic humidifiers on dogs, but if you plan to use one in a room with dogs, the sound may be painful or uncomfortable for them.
However, there is no solid evidence that humidifiers can relieve symptoms for young children, though it can make them feel better. The infant recovered, and doctors who treated him though it may have been the chemicals found in the white dust. The study investigator documented this case because he wanted to draw attention to the fact that the lungs of babies and small children may be more sensitive to the chemicals produced by an ultrasonic humidifier. The harder the water being used for the humidifier is, the more your ultrasonic humidifiers will discharge a grey dust into the room.
This is caused by the water mineral deposits in hard water. This dust specifically comes from and ultrasonic humidifier and not an evaporative humidifier because the former lacks a filter, this sometimes make it appear as if the room your humidifier is in is especially dusty.
There are several ways to combat this, such as changing the type of water being used in the humidifier, but overall, if you want to avoid this problem, choose an evaporative humidifier. So which type of humidifier is best for you? It really depends on what you value the most a quiet machine, a low output of mineral dust, or a lower price up front.
For this reason, light sleepers should stay away from using evaporative humidifiers in their bedrooms. Owning a humidifier comes with costs, both upfront costs, and costs associated with the continued operation and maintenance of the humidifier. Generally, ultrasonic humidifiers have a larger upfront cost, while evaporative humidifiers have greater operating costs. Ultrasonic humidifiers usually cost a little bit more to purchase. This is because their working principle is a little more complicated and requires more parts to work.
Evaporative humidifiers are usually a bit cheaper upfront. As your evaporative humidifier operates, it pulls in air from your home to add moisture to it. When your humidifier brings in air, it can pull in dust, smoke, and other air particles. These particles get trapped in the filter, and over time the filter will become embedded with particles that hinder its performance. Both types of humidifiers require cleaning every weeks. Both types of humidifiers come with extra features that go beyond the simple task of adding moisture to your air.
One final thing to remember when selecting your humidifier is that it can cause excessive moisture buildup inside your space. This is usually seen on the inside of windows or other cold surfaces inside your home. Excessive humidity and moisture buildup happens when the warm, moist air inside your home comes into contact with a cold surface. The cold surface forces water to condensate out of the air, and form as droplets on the cold surface.
There is no sure-fire way to prevent moisture and condensation from occurring inside your home while using a humidifier. Ultrasonic humidifiers can sometimes cause moisture buildup on the surface that they sit on. This usually happens when an ultrasonic humidifier is placed on the floor or a large table. The reason that this happens is that the water mist particles do not have enough time to evaporate into the air after being dispersed out of the ultrasonic humidifier.
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