During winter the dry heated air in homes and offices can irritate the nose and the throat. This irritation is reduced by use of humidifiers. Humidifiers add moisture to the air, which helps ease coughing and congestion due to low humidity. Humidity refers to the amount of water which is in form of vapor in the air. During the winter, air holds less moisture than in warmer days … [Read more...] about Humidifiers create perfect conditions for mould and bacteria growth in winter