ventilation pneumonitis https://www.malacards.org/card/ventilation_pneumonitis ICD9:495.7 UMLS:C0155891 humidifier lung humidifiers lung GARD:0022909 MEDGEN:510127 MONDO:0001255 DOID:11289 ventilation systems lung icd11.foundation:1414909625 SCTID:195990006 An extrinsic allergic alveolitis caused by inhalation of antigens from thermophilic actinomycetes species growing in air conditioners and humidifiers. Fungi like Aureobasidium sp and Candida albicans that survive in the contaminated water in humidifiers and air conditioners are also known to cause the disease. hypersensitivity pneumonitis