In the context of increasing air pollution and prolonged dry weather, many families choose humidifiers as a solution to improve the air in the house, reduce dry skin, dry throat and shortness of breath. However, according to experts, if used incorrectly, this device can cause significant health risks.
Dr. Majeed Pasha, a respiratory expert at Fortis Hospital (Bengaluru, India) said that humidifiers are only really beneficial when used and maintained properly. Conversely, being subjective can turn this device into a source of pollution in the house.
Risk of mold and bacteria
According to Dr. Pasha, the biggest risk comes from water stagnation in humidifiers. If not cleaned regularly, water tanks can become an ideal environment for bacteria and mold to grow. These microorganisms are then released into the air through steam and penetrate directly into the respiratory tract.
Consequences may include allergies, sinusitis, lung irritation, or worsening respiratory diseases such as asthma. Children, the elderly, and people with weakened immune systems are the most vulnerable.
Excessive humidity harms the respiratory tract
Humidity helps reduce dryness and discomfort, but if it exceeds the safe threshold (over 50–60%), the indoor environment will become favorable for mites and mold to develop. Signs of excessive humidity include water vapor on glass doors, damp walls, moldy odors, or crooked wooden furniture.
Experts warn that many people mistakenly believe that the higher the humidity, the better, while in reality this can cause prolonged respiratory symptoms and worsen the air quality in the house.
Mineral dust from tap water
Ultrasonic humidifiers when using tap water can discharge very small mineral particles into the air. These particles exist in the form of fine dust and can enter the respiratory tract when inhaled. This increases the risk of respiratory irritation, especially in people with asthma or allergies.
According to Dr. Pasha, to reduce the risk of affecting health, distilled water or mineral water should be used instead of regular tap water.
How to use a safe humidifier
According to experts, humidifiers only promote benefits and are not harmful when used properly. Users should discharge old water and clean the tank daily, avoiding water stagnation in the machine for a long time. Distilled water should be used instead of tap water to limit the spread of impurities into the air. At the same time, it is necessary to monitor the humidity in the room with a humidifier and maintain a suitable level of about 40–50%. For machines with filters, periodic replacement of filters as recommended by the manufacturer is necessary to ensure air quality and safety for health.
