The Holmes carbon air filters have lived up to my expectations and then some. As a family with a slew of chronic allergy issues the carbon air filters have had a tremendous effect our my family in the best way possible. They filter our odors from the kitchen and our dogs allergens which in our open floor plan home is not easy. The Holmes carbon filters have really made clean odorless air possible. I love them and am very thankful for the improvement in our overall sinus/allergy issues.