[header] How to choose an air duct cleaning company [title] Research the background and experience of air duct cleaning companies. [substeps] Ask companies how long they have been in business to determine their experience with cleaning air ducts. If the company itself is newer to the air duct cleaning business, ask the employees about their prior experience. 
Ask companies for referrals from past clients to see if customers were satisfied with their service. You may also ask your friends, neighbors, or other homeowners for recommendations or referrals for air duct cleaning companies.