How Do Allergens Get Into Carpet? The answer to the question “how do allergens get into carpet” is simple: the carpet is a giant air filter. Allergens will be caught by some kinds of carpeting more efficiently than others. It is important to follow this to its logical conclusion: if the allergens are being trapped in your carpet, then they are not floating around in the air where they can have an effect on you. Allergens get into carpet through…