Allergens, Bacteria, Candle Soot, Chemicals, Cooking Oil Smoke, Cough & Sneeze Debris, Dust, Dust Mites, Exhaust Pollution, Fungal Spores, Gases & Fumes, Industrial Pollution, Mold, Odors, Pet Dander, PM 2.5, Pollen, Tobacco Smoke, Virus Carriers, Viruses, Volatile Organic Compounds (VOCs)