Humidifier – NSL – System one Heated Philips (USA)

Ahumidifieris a device that increaseshumidity(moisture) in a single room or an entire building. In the home, point-of-use humidifiers are commonly used to humidify a single room, while whole-house or furnace humidifiers, which connect to a home’sHVACsystem, provide humidity to the entire house. Medicalventilatorsoften include humidifiers for increased patient comfort. Large humidifiers are used in commercial, institutional, or industrial contexts, often as part of a larger HVAC system.

Low humidity may occur in hot, drydesert climates, or indoors in artificially heated spaces. In winter, especially when cold outside air is heated indoors, the humidity may drop to as low as 10–20%. This low humidity can cause adverse health effects, by drying outmucous membranessuch as the lining of the nose and throat, and can causerespiratory distress.^[1]The low humidity also can affect wooden furniture, causing shrinkage and loose joints or cracking of pieces.^[2]Books, papers, and artworks may shrink or warp and become brittle in very low humidity.^[3]

In addition,static electricitymay become a problem in conditions of low humidity, destroying semiconductor devices, causingstatic clingof textiles, and causing dust and small particles to stick stubbornly to electrically charged surfaces.^[4]

Overuse of a humidifier can raise the relative humidity to excessive levels, promoting the growth ofdust mitesand mold, and can also causehypersensitivity pneumonitis(humidifier lung).^[5]A relative humidity of 30% to 50% is recommended for most homes.^[6]A properly installed and locatedhygrostat应该用于监视和控制湿度列弗吗els automatically, or a well-informed and conscientious human operator must constantly check for correct humidity levels.