Air humidifiers appeared more than a century ago. The problem of low humidity has not gone over the years, and therefore it is difficult to overestimate their benefit. Perhaps the only serious minus of these devices is the noise that they emit. Humidity in the apartment should be 60%. In fact, there are less than 30%. Reduced atmospheric humidity in residential premises causes uncomfortable living conditions that lead to overdrying the mucous membranes, upper respiratory tract, eye. A large amount of moisture evaporates through the skin, which begins to quickly grow old. The life of indoor plants directly depends on humidity. Understand that low humidity is almost impossible until home flowers begin to die. The problem is aggravated during the heating season, when the air humidity in apartments does not sometimes exceed even 20%. It is the air humidifiers that will help create an optimal climate in the apartment for both plants and for humans. Traditional air humidifiers cost from 2. 5 thousand rubles, consume approximately 40 watts and easily cope with a room of 30 square meters. m. A more perfect type of moisturizer – ultrasonic. The water inside it breaks down into the smallest droplets, forming the fog. Humidity near the device is about 60%. The farther from the device, the lower the humidity. But he does not make noise at all and controls the level of humidity. Costs such a humidifier from 3. 5 to 7 thousand rubles. The most advanced air sinks are considered the most advanced. Remove the lid, pour water, insert the drum. On special plastic, all the dust, dirt, and the coat of animals accumulate, which during the twisting of the drum enter the tray, which is easily washed. Air washing must be washed under the shower or stream of water every 3-4 days. Such devices cost from 8 thousand rubles. The price depends on the area of the territory that the sink can moisturize. All these devices are useful and safe. But before use, you need to measure humidity in the apartment. Its high level is no less harmful than low.