Indoor Air Pollutants and Allergy Sources
Carpets, cushions and stuffed toys containing dust mites, bacteria, carpet beetles or mold. These biological organisms and their by-products become aerosolized when these items are walked on, sat on or played with.

Off-gassing of irritating volatile organic compounds from carpets, furniture, vinyl-fiberglass screens, leveling compounds, floor tile adhesives, household chemical products and heated plastics in computers,video monitors and photocopiers.

Mold contaminated heating or cooling systems and supply ducts.

Humidifiers, dehumidifiers, refrigerator drip pans and coils containing mold or bacteria.

All pets due to dander/skin cells, feathers, dried saliva on fur (especially cats) and in the case of dogs and cats, all of the pollutants brought indoors on paws or fur after being outdoors.

Scented products: shampoos, candles, sprays, cleaners, detergents, fabric softeners, air fresheners, etc.

Fish tank filtration and aeration systems bubbling algae and other bioaerosols into the air.

Cedar walls and mothballs emit chemicals that can irritate people sensitized to them.

Insect body parts, fecal material and rodent or animal urine/feces in attics, crawl spaces or living areas.

Combustion gases and particulate matter from environmental tobacco smoke, unvented kerosene and gas space heaters, woodstoves, fireplaces, gas stoves, faulty chimneys or flues and cracked furnace heat exchangers.

Soot particles from burning candles in jars. Firewood stored indoors (insects/mold).

Carbonless paper can cause allergic reactions in some people who handle the forms, which causes chemical particulates to become aerosolized.