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.
Typically, duct cleaning takes two to five hours, but it can go on for two days if you have a large house with lots of ducts, Stradford says. On average you should spend $300 to $700. Related: 7 Household Expenses Youâre Probably Wasting Your Money On.