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A humidifier is a household appliance or device designed to increase the moisture level in the air ... The cost of these filters is about $10–15 per cartridge or 10 ...
To eliminate most complaints caused by CO 2, the total indoor CO 2 level should be reduced to a difference of no greater than 700 ppm above outdoor levels. [90] The National Institute for Occupational Safety and Health (NIOSH) considers that indoor air concentrations of carbon dioxide that exceed 1000 ppm are a marker suggesting inadequate ...
On November 11, 2011, six humidifier disinfectants which contain PHMG and PGH were recovered. PHMG and PGH was banned in 2011, and new cases ceased occurring. [1] [2] However, later on, the Korea Centers for Disease Control and Prevention did not find a causal relationship that CMIT and MIT in humidifier disinfectants cause pulmonary fibrosis.
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