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.
Watch for the following signs that an air duct cleaning is overdue: 1  Dirty supply and return vent covers. 2  Dark filtration lines on the walls, ceiling or carpet that surround the vents. 3  Excessive dust in the home.  Variance in temperature or air flow throughout the 1  house. An increase in the energy needed to operate the HVAC system at desired settings.