Mold
In its 1993 report Indoor Allergens, the Institute of Medicine concluded that airborne fungal allergens (mold) were most often associated with allergic diseases including asthma and hypersensitivity pneumonitis.
Pets
According to the Asthma and Allergy Foundation of America, 15 to 30 percent of people with allergies have allergic reactions to cats and dogs.
Pollen and Dust
The American Academy of Pediatrics states that dust is one of the most powerful biological allergens! Airborne pollen and dust particles that settle into furniture and carpets are easily disturbed and sent back into the air which can trigger allergy attacks.
Dust Mites
According to The Asthma and Allergy Foundation of America, about 20 million Americans have a dust mite allergy! These microscopic creatures are one of the most powerful biological allergens found in ALL homes and businesses. They migrate into mattresses, furniture and carpets. One-half teaspoon of dust can contain over 1,000 dust mites.