Overview (3) Heidi Klum was born in Bergisch Gladbach, a small city near Cologne, Germany, in 1973. Her career as a top fashion model and swimsuit star began almost by accident when, on a lark, she submitted photos to a model competition hosted by Petra, a young woman's magazine.
The National Air Duct Cleaners Association recommends getting your air ducts cleaned every three to five years. Ed Mack, owner of Air Duct Professionals in Lake Elsinore, California, says homeowners should consider doing it every two to five years, depending on their circumstances.
Your HVAC system and air ducts should be cleaned for the same reason that your home needs cleaning. Suppose that your home had not been cleaned for three to five years? Most home owners keep very clean homes and they cannot believe what is commonly found in HVAC systems. Even new homes have air ducts which are filled with construction debris. It is recommended that HVAC systems be cleaned every three to five years.