Stanley Steemer’s carpet cleaning service is certified asthma and allergy friendly™ by the Asthma and Allergy Foundation of America. What does it mean to be certified asthma & allergy friendly™? All certified asthma & allergy friendly™ products and services undergo extensive scientific testing in independent accredited laboratories to ensure that they meet the standards adopted by the Asthma and Allergy Foundation of America. In fact, Stanley Steemer® is the first carpet cleaning service to earn this certification, removing an average of 94% of common household allergens from the carpet we clean. Those common household allergens include dust, pollen and pet dander to name a few.