Chem-Dry is a carpet cleaning and upholstery cleaning franchise chain with main offices in Logan, Utah and Nashville, Tennessee. When it was founded in 1977, it was originally based in California. Chem-Dry began franchising in 1978 and now has over 4000 locations worldwide, making it the world's largest carpet cleaning franchise chain. In 2006, Chem-Dry was acquired by The Home Depot.