Ключевые слова: air, aircon, airduct, asthma, background, bacteria, building, ceiling, chest, cleaning, coil, cold, conditioner, conditioning, coolant, copd, cough, dirt, dirty, disease, duct, dust, fan, filter, filtration, fungus, grill, health, heating, hole, home, illness, industrial, industry, infection, interior, lung, maintenance, metal, molding, office, pattern, pneumoniae, respiratory, sick, streptococcus, texture, top, vent, ventilation,