Need for Humidity: Ideal humidity recommended level is 30-50 percent. During summer, Air conditioners suck out the moisture from air thereby rendering it dry. During winter, air becomes stale and dry. F628 Humidifier Prevents: Dry skin | Sinus congestion / Headache | Dry throat | Nose irritation | Dry cough | Cracked Lips | Bloody Noses Warning : Higher humidity levels also can lead to : Dust mites * Mildew * Mold * Harmful Bacteria Stop using humidifier if humidity level breaches 50% (HYGROMETER) About Deerma Deerma is a fast growing contemporary brand among small home Appliance in South Asian market. Deerma range is so unique and exquisite that it has captivated millions of hearts within a short span of its existence. Deerma is part of a 4Billion USD group which has got it strong roots in design & technology.